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2-Stroke Racing Go Kart Find!

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In this video we start working on the new project....a 2 stroke go kart with a Yamaha kt-100 engine. The kt 100 is a two stroke motor that is capable of 15 horsepower in this 10,000 rpm go kart. This is a completely race legal go cart that we are super excited to get completely dialed in and make some awesome videos with it.
This barn find racing go kart has not run for a few years now and definitely needs quite a bit of work to get it back into its prime so be sure to stay tuned for videos of it in the future.
Thanks for watching and be sure to subscribe!
*Be sure to check your local laws before driving any non-registered motorized vehicle. Do not attempt these activities at home. All content produced by Build Break Repeat is for entertainment purposes only.*
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21 авг 2024

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Комментарии : 541

@CarsandCameras 6 лет назад

I’ve been looking for one of those engines for years, $400 is a killer deal

@hotrodj21 6 лет назад

CarsandCameras yamaha also still sells them

@michaelmcginnis9029 6 лет назад

Sounds like the plug could be dead

@daniellittlewood9670 6 лет назад

CarsandCameras get a vintage kart

@jackharris8932 6 лет назад

Could you guys sub to my link

@utericers5281 6 лет назад

Come to Australia! We still race them here. Got mine for 200 running and rebuilt

@jarradpowell8231 6 лет назад

The BCR on the head will be the kart shop that RE built this motor, I rebuild these ever 10 hours when in race conditions,we still use these motors in Australia for a bit of fun. To prime the carb, take spark plug out and place palm over intake and turn motor over until you feel fuel on your hand. The high and low jets are your fuel meters, start with low jet 1 and a half turn out and high jet at 3/4 turn that's a good start. Supposing this is the walbro carbs we use here. Make sure you haven't got gunk in your crankcase from when you cleaned it. Most importantly have fun these things are sick,wait until you get to use it on a track.

@jarradpowell8231 6 лет назад

Also don't idle these motors on a stand without load, your exhaust will clog itself up and spark plug will go to shit. Also probably need a rebuild kit through the carb.

@BuildBreakRepeat 6 лет назад

Jarrad Powell Ok awesome, thanks

@jarradpowell8231 6 лет назад

Build Break Repeat easy done lads!! Let me know of you have any other questions but sounds like you have a pretty healthy motor for the time being! Keep up the great vids!

@joe5878 6 лет назад

Make sure you have the right oil mixes, also check compression, another cheaper and easier way to deal with low compression is put some 2 stroke oil down the cylinder before starting

@mikec1544 6 лет назад

Check the compression. Low compression in 2 smokes makes it act like that. New plug and new gaskets, clean the carb it should run like a top

@justinblanck5287 6 лет назад

Get a carb rebuild kit, the little gaskets may be dryed out. Your compression should be more than 110lb. Your magneto may need to be timed, that will be under the flywheel just like a durt bike, it may have markings on it to time it. The kart looks to be a 80s, most likely margay or yamah, there should be a number stamped on the inside of on of the front king pine holders.

@rickburnout666 6 лет назад

When starting my 1990's 100cc class one kart similar to yours I always put my hand over the air intake to draw the fuel up to get it to fire up no problem

@BuildBreakRepeat 6 лет назад

rickburnout666 I’ll try it. Thanks

@wheeln24-79 6 лет назад

Build Break Repeat I'd put a new spark plug in it first. 2 strokes can foul a spark plugs quickly so might be a good idea to have a few around. It'll look like it's getting apart but won't be strong enough to run. The hand over the carb to draw fuel in is a good tip. You can to the same thing by placing your hand over the exhaust outlet and instead of sucking fuel it'll force fuel up into the carb. You can hold your hand over the exhaust until it starts to run, If you can't find any initial carbs setting online turn the high speed all the way in and set it to 1-1/2 turns out and the low speed needle to 3/4 out. There's probably a air speed screw too and that'll take some fine tuning to get it set right. But you'll love how much power you'll get out of that little engine and It'll teach you a lot about tuning. Keep your eyes on the lookout for a 2 stroke dirt bike you can get a enjoin out of. You could probably pick one up for real cheap. A 125 on that little cart would be sick! You'll have to rig up a shift lever and a clutch lever to get it off the line but you won't need to clutch after that to shift up and down. Just imagine having 6 gears! I'm sure you already thow this but they can got up to100mph with the right gearing. This cart the way it is now is still gonna be a blast! Looking forward to next video when you get it going!

@wheeln24-79 6 лет назад

Build Break Repeat Oh yeah and look into getting a kidney belt. Those racing carts can make you sore from how hard they turn. A lot of race car drivers start out racing go carts they're good practice and they'll reach you a lot about turning at high speed. I see a lot of drifting and bonuts in your future lol. Just be careful and keep having fun! Your channel is awesome!

@Aaron-bk2ue 6 лет назад

Kt100s in general are very finicky engines. The coils fail often due to the heat of the engine when racing along withe the cdi box. If it runs good cold and dies when warm it'll need a coil soon. As for the carb the high speed needle should be 2 1/2 out and low speed is 1 3/8. Adjust as needed when full throttle. Also the compression should be anywhere from 110 to 150. But chances are its the carb or main coil.

@BuildBreakRepeat 6 лет назад

Aaron Ok cool thanks.

@rdspix 4 года назад

Nice old Yamaha kt100. That’s what I started racing years ago

@davidferris7258 6 лет назад

I personally like to run my 2 strokes with a little extra rich mixture because its better to use a little more gas than risk hurting the motor. And if it still doesnt run check your fuel/oil mixture. Good luck.

@nybriks7336 6 лет назад

Take your carb out and clean the idle circuit with carb cleaner an unscrew all needle jets spray them thru also, an blow out holes. Make sure diaphragm has no dry rot damage gas has a tendency to do so after sitting for a while an can gum up an make stick. Check spacing on your excitor coil if its too close it wont successfully spark possibly grounding itself out, causing spoty spark. Also check your spark plugs always, there your window to your motor. Make sure the gas oil mixture is correct

@AuMechanic 6 лет назад

^^^ do what he said.

@jones420of88 6 лет назад

Nothing like drying cylinder up with some starting fluid lol

@ExperimentalFun 6 лет назад

Good chance it has weak spark, try a new spark plug first, 2 strokes like to burn up spark plugs. next check your grounds and coil.

@BuildBreakRepeat 6 лет назад

Experimental Fun Just ordered some yesterday, hopefully that’s the issue thanks.

@DrifterDavid 6 лет назад

Agreed good place to start

@DrifterDavid 6 лет назад

And if you can get the model of the carb off the side I can get the stock tuning numbers for how far out the screws need to be.

@braconzebb3911 5 лет назад

Was gunna say new reeds

@pieterbezuidenhout2741 5 лет назад

@Chiko Eval Same thought from first attempt.

@mikleach 2 года назад

The engine has been around since the early '80s. The setup you have is probably dated 1990-1993 vintage. This was the height of my racing career. I ran almost the exact same setup in the WKA Nationals. I know every part of that kart like the back of my hand.

@windellisgreat 6 лет назад

That's a crazy little 2 smoker, cool find. Also looks like an early 90's Margay. And like some other guys said, clean the carb well and make sure to prime for enough fuel. Is that a Walbro carb? If so you may be able to find rebuild kits at a small engine repair shop, check the tiny screens inside of it and the needles. Then run through all your gaskets to make sure there isn't a leak anywhere. Thanks and Gig 'Em.

@markssmallengines3542 6 лет назад

Do a leakdown pressure test on the motor incase a crank case gasket is blown or crank case seals are shot an also do the carb. Id say there is a vaccume leak somewhere. If you dont have a pressures testing kit you can start it back up and spray carb cleaner around all the carb/gaskets, crankcase gaskets an jug base gasket If it stalls as soon as you spray the liquid means its sucking in air an you can pin point the exact leak when you spray the cleaner.

@BuildBreakRepeat 6 лет назад

Mark Dillon Oh ok, that’s a good idea. Thanks.

@terryleyendecker8934 6 лет назад

Carb ! Diphrame its like an old snowmobile carb !! Thing is awsome guys hope u guys get the parts to get it going

@fooliganvlogs 5 лет назад

Fun video to watch! Considering grabbing myself a coyote wide track kart.

@nielsmaronde2708 6 лет назад

Turn the idle screw(the big black one) all the way in, the give 1,5 turn out. There should be another screw which is for the air mixture. Turn that all the way in, and give 1,5 turn out. Start the engine, and adjust the idle so that the wheels turn and let the engine warm up 10-15 minutes. When warm adjust the air mixture screw by 0,5 turns (out or in) the goal is to find the highest idle, when thats done, you can adjust the idle screw again to find the best idle

@BuildBreakRepeat 6 лет назад

niels maronde Ok, I’ll give it a shot. Thanks.

@nielsmaronde2708 6 лет назад

And you should probably clean the stator connections with som sandingpaper aswell, and replace or clean the sparkplug :)

@danr597 5 лет назад

Low speed jet 1.5 turns out, High speed 1/2-5/8 out. But... you need to rebuild that carb first. It's a Walbro and you can likely get it online. The Pumper diaphragm is likely stiff and is not able to pump fuel. Also, the needle is likley shot and not sealing correctly either.

@brandonandrew6844 6 лет назад

Cool kart. I would’ve thought it would have a bigger carb. Good job.

@kgbigdog1596 5 лет назад

That flinch was priceless, when it popped for a split second.

@rollafatonedude 6 лет назад

you want a carb kit for that carb change out the diaphragms as its a pumping carb . best way to check it is to see if its lifting fuel from a lower level . if it pulls fuel from lower the pump is working , if not there is your problem . you should also have a pop off pressure gauge or a little hand pump to measure the pop off pressure . i will see if i can find you a link .

@rollafatonedude 6 лет назад

www.iwt.com.au/tillotson.htm

@rollafatonedude 6 лет назад

tillotson.ie/wp-content/uploads/2015/07/techinfo_hl_eur.pdf

@rollafatonedude 6 лет назад

these links should point you in the right direction . may not be a tillotson carb but it will be very very similar they are all pretty much the same

@michaelmartinez1345 5 лет назад

Nice buy!!! 2-stroke engines need good compression in the cylinder and the crankcase... When the piston moves twds TDC, it compress's the fuel/oil-air mivture in the combustion chamber. When the piston moves twds BDC, it compress's the fuel/oil-air mixture in the crankcase. If the seal of any of the following components is defective, the engine will not run properly: Head gasket, cylinder base gasket , piston ring(s), lower case half gasket/sealant, crankshaft seals... Also check the reed petals on reed-valve engines and the rotary disc sealing and condition on rotary valve engines...

@tylerharkness689 6 лет назад

Ya it’s got a BCR raceing head I run them on my race sleds and dirt bikes. Lots of pawer

@jaggerdfletcher1618 Год назад

Well done getting that lawnmower running again!!

@AtotehZ 6 лет назад

Formula Yamaha :) It's a fun kart and the most powerful one to use slicks in the wet.

@theirishaxe9405 6 лет назад

You should have poured some 2stroke oil in the spark plugs hole before you tried to turn it over

@consolehacker54 6 лет назад

A bit of oil in the cylinder can also help if the rings are a little stuck, or just bone dry from sitting. On a (4 stroke) BMW motorcycle I have due to the way the engine is laid out, after sitting for long periods oil will run down away from the rings and cause low compression

@theirishaxe9405 6 лет назад

Jason Grimm the spark plugs hole is the cylinder buddy.

@charlienorton2337 6 лет назад

John Smith he obv knows that but I think you just read it wrong

@roypatterson9910 5 лет назад

I just noticed you made the same comment I did! LOL

@brianw4065 4 года назад

So true man

@Mad-Duk_Machine_Werkes 6 лет назад

OK, so that "Bash Bar" as you called it with the clever sticker on it is a chassis stiffener bar, you adjust it to change how much the rear of the kart flexes in curves, & combined with a bunch of other settings it'll help you hook up in the turns -

@Mad-Duk_Machine_Werkes 6 лет назад

Most common thing for an old Two-stroke RACE engine thats been sitting that long would be CRANK SEALS - if the fuel tank & line was that brittle, and the vacuum-pulse line from the crankcase was too, why wouldnt they be? Air & Vacuum leaks will DESTROY a two stroke - as a lean condition will cause the piston to weld itself to the cyl walls, might as well just get the numbers off the motor and start right off with a fresh set of rings and all new gaskets and two seals...... Also that clutch seems like its not releasing properly, I noticed when you hit the brakes it was really dragging the engine down, you have a problem there too- we always ran Horstmann Lock-up clutches in the 90's on the 2-strokes, dont know what brand you have there? Best place for advise and possibly old NOS parts would be TS Racing in Central FL, as they have been a Margay Kart and Yamaha Kart engine dealer since the dawn of time!

@Wylie013 6 лет назад

Good Vintage Kart you have acquired there at a great price. Looks like a Margay from the 80's. I have a copy of the Yamaha owners manual from the mid 1970's when these motors first came out. Standard Carb setting is High speed needle (H) 3/4 + or - 3/16, Idle needle (L) 7/8 + or - 3/16 Idle speed 3,000 to 3,200 rpm. The inlet screen gets clog so check that is clean, also the metering lever standard is 1.4mm below the diaphragm mount best to make up a little gauge to check that. Once you get it runni ng properly operating range is 10,000 to 14,000 rpm. With the right gearing it is capable of 100 MPH. Raced these in the 70's & 80's have one setup with two of these motors on.

@Wylie013 6 лет назад

Also Margay karts is still in operation, so if you contact them they can tell you more about the chassis you have.

@joeshmo2473 5 лет назад

Im jealous yours is complete.... I have to build mine but because I have to buy parts and build it I think in the end I will appreciate it more and be proud of my creation.

@_ds804 6 лет назад

I'd also check the cylinder walls for deep scores and/or abnormal wear to the crank

@elikirkwood4580 6 лет назад

it could be gaskets causing a vaccum leak. once you get it running get a slide carb for it, they work significantly better than butterfly carbs

@seanbauers5424 6 лет назад

I need that c-10 hub cap on the wall in the background, no joke

@danstruble4970 5 лет назад

The box on the steering wheel is a digitron tach and temp gauge, should have sensors going to the plug wire and the cylinder head of the motor. The clutch needs to be cleaned if the wheels are spinning with the starter, probably just dirt and rust in there. Most likely a margay frame, a great buy for $400.00. My Dad was a kart designer for Moss Kart back in the 1960s after working for Buddy Baker, so us kids grew up around and in kart racing. Geared right that kart will easily do 70-80 mph, always wear a freaking helmet!

@bryansimpson743 5 лет назад

Put air filter on it. They also make small engine fuel filters. Can pick one up at any small engine shop. Check gap in spark plug. Hold foot on break when starting. I raced a kt 100 on dirt racing kart. I've raced for many years. Also when adjusting your carb watch ur tac to see what rpms your are running. Should idle around 4500 rpms

@nicovanduin1553 6 лет назад

the pipe with the sticker on it is not a bash bar, its a so called stabilizer bar. You can install it to make the chassis more riggid. You can also fine tune by rotating the flat part in the horizontal or vertical position. (horizontal: more flex, vertical: less flex)

@spikemandan 6 лет назад

awesome kart bro cant wait to see it ripping down the streets ;)

@gregderrick5831 2 года назад

I was in Karting for many years ago. I'm not sure the exact year but I'm quite sure that Kart is a vintage Margay Lynx. It's either an 86-87-or 1988. The M on the seat cover is a Margay trademark. I would love to find one in that condition for complete restoration. You have quite a find. The KT-100 is probably one of the finest 2 stroke engines ever made for the beginner. Good luck son..

@larryalexander4833 6 лет назад

That is a diaphragm pumper carb. Be extra careful check the plug( color and deposit s) and make sure it doesn't run lean .

@rustycrustymakesstuff6528 6 лет назад

Talk to the guys at comet kart sales in Greenfield Indiana. They’re super knowledgeable on 2 strike stuff and have parts to help you out. I used to buy a lot of stuff from them back when I was racing unlimited 2stroke in my younger days.

@markheberling3962 6 лет назад

also check the diaphragm in the carb for holes tears and flexibility soak the carb in carb cleaner remove any plastic and rubber parts first count the needle turns on the high speed and the low speed you should be able to see the letters H and L on the carb soak overnight Rinse with water and blow out all air ports with a air compressor then reassemble

@joewilliams3352 5 лет назад

Thats the one that you should but the turbo on. 10K RPM will spool it niiiiice!

@keithfreeman5204 4 года назад

There is still gunk in the carburetor. Take apart,again, completely, blow out all the passages, reassemble. Main Jet 3 1/2 turns out, this will be rich. Once running, and warmed up, lean it out slowly, when the engine,"comes on the pipe", RPM will come up, then richen it a bit.

@jasonjaeger4042 5 лет назад

Man, to see kids that do know two strokes is heart breaking. My son is 13 and every machine he's had has been a two stroke, first quad, 50, 65, 85, and 125 MX bikes and his snowmobile. Damn four jokes are taking over everything. If you guys have any questions lmk, I'm an MX Tech and ride nothing but two strokes.

@brandonandrew6844 6 лет назад

Two strokes are sick! Braaappp!!!

@stevebycroft6678 5 лет назад

Hi guys, your yamaha kt100s does not have read valves, so dont go looking for them. There are thousands of those engines in Australia and we have only stopped mainstream racing them in the last couple of years (THANKS MICK DOOHAN ). Listen to the guy that comented from Australia he knew what he was talking about. Most of the other comments might understand 2 strokes but not walbro carbs on yamaha kt100s engines. Good luck and keep the videos coming

@mikeroberts7775 6 лет назад

It’s mike roberts from way back when. It’s a JICA kart you need to choke it by putting your hand over the carb. And if you are driving it and it gets hot put your hand over the carb so that it will cause it to suck in more fuel and cool it. Under racing conditions you will find a lot of people doing this at the end of the straight. Take the head off and see if the piston has ever been stuck. In other words are the score marks in the barrel. What you referred to as a bash bar with the Surgeon Generals sticker on it is actually a bar that is used to stiffen the chassis for faster longer tracks. If it had fuel in it when you picked it up the carb is probably gummed up. Do not leave any fuel in it and let it sit always drain the tank before you put it to bed. I am just thinking off the top of my head. Another thing you could do is buy a 125cc Honda MX motor with the six speed box and you should be able to buy motor mounts that will enable you to bolt it to that chassis. Then all you would need to do is mount a shifter on the steering column and the clutch handle. Not a big deal. That would give you something that is getting close to the shifter cart you have always wanted. They don’t have the power of a purpose built shifter motor then again they don’t cost thousands of bucks. Is there a name on the chassis. Have fun.

@CaptaiCaveman 6 лет назад

Always clean the carb if it's been sitting a while. If your stuck drop us a mssg. Member warm the engine up for 3-5 mins before you give it stick. Never put too much oil in the petrol or filler. And stay safe

@0Pranzetti0 6 лет назад

Just found this channel. You got yourself a new sub all the way from Oregon!

@3mobpaintballnut0 4 года назад

me and my dad used to race 100cc dirt track karts god i miss those days

@crustybynatureboyyy5401 6 лет назад

Can wait to see it on the raod! That thing is sick!

@25skeet50skeet 4 года назад

CRUSTY BY NATURE BOYYY raod?

@osamabinladen5936 6 лет назад

Let it run for about 5 to 10 minutes before you even think about trying to tune the carb because with my experience they have to be fairly warm to run right ........ also check the compression

@1MACVSOG1 5 лет назад

What should the compression be for this motor. ? I just picked up a kt100 on a nice Prowler kart frame? I got a hell of a deal on it but I don't know anything about this motor I haven't fired it up yet I have just been reading all the comments trying to figure out carb settings and stuff glad I read to start it under a load! The motor is off the cart right now and I was going to try and start it on a engine stand I'm glad I didn't I'm going to go ahead and probably rebuild carb. While I'm at this point! Thanks for any info I also got 3 dry clutches 2 that are a horstman 2 disk, but they are the wrong size on the shaft it came as extra parts the one that fits the KT100 is a 1 disk dry cheap looking clutch? I'm 6.3 220lb what type of clutch do I or should I run for it to handle what I need??? And eventually I want to figure out and learn how to make stock kt100 fast and what that involves? Thxs for any info.

@michaeldilger9582 6 лет назад

Nice cruiser

@thedadbodgarage1823 5 лет назад

That is a Bob Casebeer Racing ported head! He was huge into building 2 stroke engines.

@chrisbrown3277 5 лет назад

How cute two kids with a rich mommy and daddy

@karlheinrichs3094 4 года назад

Race karts are expensive! I used to fix these things and they need to be rebuilt after almost every race. Try getting a new cylinder head, piston rings, and piston. Might need new road valves also. Wouldn't hurt to put a new spark plug and re-gap the coil and also get a carb rebuild kit. Cleaning out the exhaust helps sometimes also. Two strokes are dope tho haha

@smallenginedude71 6 лет назад

people would want $1200 for that here in australia. nice find

@markheberling3962 6 лет назад

you have to pre pre pressurized the the fuel system just a bit before starting or you have a hard time starting and the engine needs it's oil

@burtronomaniac 3 года назад

New plug , choke it with your palm over carb and let it get warm A two-stroke is a cold blooded beast

@trevordavis4728 6 лет назад

Look up a tuning manual for that carb. Keep tuning that low tuning screw till it idles right.

@nikolaschmidt1112 6 лет назад

Best to tune the high and low needles whilst the karts under load (whilst you're driving it ).

@steevemccloud5841 6 лет назад

The think I saw the preliminary vacuum line was a little loose. The return module (the little black one) seemed turned over a little bit. That’ll be your best bet! Cheers and keep up the great content!

@craigjones2015 2 года назад

Looks like the clutch is engaged

@brotang2953 Год назад

Those kt100's are pretty quick for a small engine👌

@kartchampions7640 6 лет назад

i used to own one of those engines there called a yamaha 100s race engine, ps. the reason it is so hard to strat is that you need to choke it every now and then to get it to start, plus put a new spark plug in it.

@sondrekvernstuen436 6 лет назад

Maybe test crank-seals? Hold a paper in front of the carb to test the suction. Also try to use starter-gas on the crank seals/crankcase while the engine is running and listen for change in rpm. Considering the engine has been sitting for a while, these seals tend to dry up.. Just a thought :)

@BuildBreakRepeat 6 лет назад

Sondre Kvernstuen Ok, I’ll take a look at them, pretty sure the box of parts has some new ones anyways

@that2kdad13 5 лет назад

I have that same kart and engine. I bored and stroked it yrs ago thing still runs super fun and fast.

@bryanc447 6 лет назад

Damn those are rare

@josephtaverna1287 6 лет назад

You might as well say you won the lottery the day you bought that go kart the starter alone is $150 I just I'm just beside myself I can't believe that if there was somebody in New Jersey offering that if I had to walk there for 50 miles I would I just can't get over unbelievable

@ollie__goodman5710 6 лет назад

Man I wish I had one just like that. Great deal and find!

@tjreeve9024 6 лет назад

Thats from the 70s if you want to be successful you need a modern chassis and also an engine rebuild every season

@donraabe3529 6 лет назад

That clutch is a wet clutch. It needs oil in it but I can’t remember what kind it takes.

@coreymarshall4879 6 лет назад

Swap out your spark plug in between starting and running it. I have found with 2 strokes they flood with fueleasily and when your plug is wet they won't run for nothing.

@Stuckin330 Год назад

Need to watch cranking it over like that an the engine not starting it could wear the rings an piston if it’s not sucking in the mixed gas . I’d rebuild the engine top and bottom an new seals on crank

@hobbyhomesteader984 6 лет назад

The crank vacuum comes from good rings and head seals. You can also put a bit of 2 stroke or crank oil in the compression chamber to help reseat the rings.

@InahaFrost 6 лет назад

GREAT PROJECT AND VIDEO

@lachlanvandermeer1971 6 лет назад

The tuning for these carbs start at 2 turns then work your way to 1 1/4 turn on low jet and 1/2 to a 1/4 turn on high jet, best to check spark plug every time you drive after making adjustments. that’s with a fuel ratio of 20 litres: 1 Litres of oil, new spark plug would help. I’ve raced them for about 5 years and they are a bloody strong engine. You can easy get 16,000 rpm with these engines, also check the rotor gap with a business card thickness. I’m from the land down under 🇦🇺cylinder head temp shouldn’t go above 200 degrees Celsius, not to sure about exhaust temp tho.

@savage9scorpio 6 лет назад

1st things first you gotta run 2 strokes with oil mixed in with the gas... hope y’all got it runnin

@Robertas_Grigas 6 лет назад

Oko 26mm carb + pulse fuel pum = happy 2stroke

@JR-ml5iv 6 лет назад

Great vid guys, love that you show your trial and errors!

@FabFiend 6 лет назад

check the crank seals. and btw that carb is called a tillotson. so internal fuel pump and no jets your "jets" are those needle adjustments. if you need parts to rebuild it or anything look up scooter swapshop talk to brandon he knows all about those

@mainebassin8176 6 лет назад

Make sure you guys mix the gas and oil right like 50:1 or whatever the engine calls for

@a.drenalin 5 лет назад

50:1 is to poor for this Kind oft motor It needs about 20:1

@johndeergaming4313 6 лет назад

Go Texas

@colerippeon3903 6 лет назад

Definitely check compression. Just because it "sounds" like it has good compression doesnt mean it does. If you cant find compression specs for that engine then shoot for at least 90psi. Anything less and it needs the top end done. Also check your reed valves if it has it. They will be behind the carb, tucked in the cylinder. They should shut smooth and be free of cracks and debris. You issue is definitely with one of these 2 things. Not much else ever goes wrong with a 2 stroke

@timknight5662 6 лет назад

2 strokes racing karts tend not to run at idle, so don’t beat yourself up about not running at low rpm, it’s common for them to cut out at low rpm, but with some throttle it should be fine

@casualkarting6492 6 лет назад

Sucks isn't running well yet. Kt100s are stupid fast. So fast I had to take mine off the kart and put a predator on it so I could trust the wife on it XD. Good video guys I can't wait until this thing is rippin.

@danr597 5 лет назад

KT100's are really not stupid fast fast (not saying not too fast for the wife though) . As a Jr we ran KT100's unrestricted before moving to A and Super A then shifters once I was 16

@AuMechanic 6 лет назад

Put a gasket set in the carb The pulse diaphragm might have dried up and gone a bit hard, and or water inside (power washing a kart is not such a good idea)

@strokerace306 6 лет назад

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@hotrodj21 6 лет назад

its a b c racing cart 1 of a kind......

@borito095 6 лет назад

It is your spark proberly

@kgbigdog1596 5 лет назад

Wow 400 bucks, really. Great deal, .wish I seen it, lol.

@sammyrothrock6981 5 лет назад

First thing after establishing spark and compression before taking carb apart count your high jet low jet turns to full in to seat make note of them .. Always start with high setting about a turn to 1.5 turns to start ... Tear carb completely down soak in a carb cleaning solvent like briggs and stratton or such submerged if possible...blow out all jets with high pressure air... replace fuel diaphragm and seals . It should run ... The original settings should be close as a rule .. Another thing mechanics tend to over look is the crankcase seal its very important on a 2 stroke motor since that downward vacuum stroke on piston activates the fuel pump diaphragm.. .... good luck

@nathtomlinson8755 5 лет назад

Carb rebuild and a new plug for sure. Looks like a walbro wb19 carb? It will need a rebuild. Rebuild it and you’ll be sorted. I used to race formula tkm using these carbs. Keep it super clean aswell. Take the head off and make sure the piston ring isn’t gummed up. But your problem will definitely be the carb. Hit me up for any advice.

@georgemichael6922 5 лет назад

There's no 2 stoke oil in starting fluid and a 2 stroke engine is basically the same as a four stroke, spark fuel fire the only difference is it uses reeds instead of valves you boys keep messing around with engines and you will end up being pros it's really cool seeing you youngsters into this type stuff keep it up

@josephdickerson5802 4 года назад

That engine is badass 💪 🔥👌 it's already a tuned monster

@vwbeetle5578 6 лет назад

Low needle needs opening so it gets fuel to idle on.. High speed needle is for top end so leave the high needle alone for now and unscrew low end till it runs then adjust idle screw and go from there

@WillSalisbury 6 лет назад

ah, a late 80's Margay. Can't remember when they first started running the front fairings. Would love to know the history behind this kart. Looks like it had it's share of WKA races from that era. There's LOT'S of information on yamaha's out there. Their still run on a national level in some series with the 4 hole can, instead of the pipe. I really don't condone running in a parking lot or street. Take it to a track, and then see what it can do. As many said, if you have any questions or need parts hit up Woltjer Racing Engines, or Comet Kart Sales and take a trip to New Castle Motorsports Park, , they've been in the sport for a long time, great people, great facility. Good luck

@madmod Год назад

Love that Andrew Applepie

@MarioVlogsBR 6 лет назад

I love the truck, keep the great work up!! :)

@garrittpwl 5 лет назад

lol 16:1 in a KT100 believe it or not. This thing won't start because they don't have the carb setup right. I've got 7 of these engines in my garage. We still race them today.