$500 Yamaha YZ450 Reassembly | Will It Run? 

I should have added this to the video, but yes the bike has good spark.I got a chain and a clutch cable in the mail so I'm gonna be able to bump start it if I can't kick it over. Thanks for watching, stay tuned my bro's.

I would check the spark first. I see you spray starting fluid and it didn't even cough, I don't think you have fuel related problem.

The fact that he adds his mistakes which anyone can do makes this channel way better we all have learned from someone else's experience

Just a tip, you are starting it wrong so thats why its maybe not starting, 1. Get it to the compression stroke. 2. Kick it slowly throug the first heavy part of the stroke, it wil overcome and get to a second heavy stroke. 3. Jump up and kick powerfull with streched leg, standing on the kickstart. 4. Repeat till started.

Adivce: 1. when ur carburator starts leaking like that, it means the floater is hung. Try tapping on the bottom bowl to see if it releases or fix it. 2 Its extremly hard to start with a newly oiled filter. 1. U got to put more power in to the kicks. 4 Try towing it to start from 2nd gear. 5 Give it ur best. Like ur videos, keep em coming :)

Dude your kicking it completely wrong, get it to top dead centre thn give it a proper kick, look up vids on how to.start a 450

i really appreciate how much this is teaching him

Keep at it mate. You will figure it out. Great job so far

Looking forward to the complete build series. All the best!!

Good job on the build! Thanks for the new vid!

Ah what a bummer. Good luck. 🍀👍. Somebody else suggested to tow start it. That was my thinking for it too. Then if it still doesn’t run you can deepen your investigation into the other problems you have. Good video goldguy. Your a favorite of mine to watch. Your a hard working man It’ll come together soon for you.

The thumbnail from the side you look a little like Mr beast

Gotta get it right after compression stroke and kick it hard

Binge watching all yours vids 💪 Like em alot

Awesome video. Good luck starting it.

You’ll get it started Good luck

I LOVE THIS CHANNEL

Similar story with a CRF450. It was not run for years and nobody could start it. So I bought it for cheap and finally started it after 3 carb cleaning. The leak jet was clogged. Ran fine after that. Don't forget to check the accelarator pump diaphragm. Put a box or bike stand for your left leg when starting. Makes things much easier.

0:44 I love the effort u out into that kick (nice vid btw)

Mine had a resister in the sparkplug boot swapped it out for a chunk of copper wire made a big difference in the way it starts

Nice work!! Little tip from my part: Don’t just push down on it with your leg. Stand up and put all of your weight on it like a small jump amd let your weight do the job.

2 factor, Electricity and Fuel distribution

I like watching people trying to start there bikes

Great video GG! ..most entertaining,..as usual!.. So, then the question is: spark?..fuel to carb?..compression?.(seems ok,..according to your kicks..)..try it with a little fuel domn the hole?.. -not much thou.. -you'll get it figured, that's for sure! ..

If I was you I would look up some vids on how to kick start a 4 stroke engine. The way you kick now can cause your kick axle to break. If you do it the right way, the risk is lower and it will be way easier to kick it over. Good luck with getting it running!

Bro it's a dry sump I've got a 07yz450f and mine takes 1 litre or 1.2 litres with a filter change that's what the factory recommends

Look online for any service manuals close to the year of the bike if not exact. Go back to stock jetting and throttle needle adjustment as well as replacing the Excelerator pump diaphragm, (fuel plunger). Check your float height, the float should be parallel to the bowl mating surface. Then make sure a your fuel/air screw, (blue screw on bottom of carb), has 1 spring, 1 washer, 1 o-ring in that order. Adjust by screwing in flush and backing out 2 1/2 turns and make slight adjustments from there if required. Only adjust while the bike is up to operating temperature, otherwise adjustments are useless. Good luck, and find something to stand on like a stool to kick the shit out of that bike!

Put it on a stand so it’s stable. Put on a boot with a thick sole. Trust me this will help a lot. You need to find top dead center. Usually a couple easy slow kicks. Then give it a good kick. They have to be just right. I have the same bike. Once you figure how to start it you can do it pretty easy moving forward. Good luck. Mike

Yoooo your video just inspired me i have one just like this sitting around

looking forward to the next video :D

Waiting for the new video !good job 👍🏻

Stick with it brother you will sort it out

Carb on and off: take lower subframe bolts out and loosen the top ones, lift, put carb on engine side first, tighten, then airbox side

When kicking it over, slowly turn it just past top dead center on the compression stroke, then kick it hard. The way you’re doing it now could break the kick starter case and it’s not giving you enough energy to kick it over. Big for strokes have a very specific way to kick them over, I had to learn it with my bikes, Suzuki SP500, xr500 and xr600 owner.

Hey Gold Guy sad to see that the bike wouldn't fire up today was looking forward to hearing it run hope my advice can help you. First of all check for a spark if there is no spark either the CDI unit is dead or the coil is dead. There could be a break in the HT lead or the spark plug cap could be arking out and not letting the spark plug have a spark or the spark plug could have a hair line crack which will stop the spark. There could be a problem with the kill switch not making a circuit. If you have an ignition switch check with a multi meter that it's making contact as the key maybe turning but not turning the connection inside as it's only plastic and all ignition's are prone to snaping the plastic pin inside which joins the key to the connector. Replace that needle jet for a new jet as the solder could be affecting the flow of fuel. If all that is fine check the valve clearances. If you have them too tight or too loose it wont fire up. If it's not a too bigger job remove the auto decompressor and that way you might be able to do the compression test. And last of all if it's got an earth wire make sure it has a good clean connection and that its tight. And change any diaphragm's in the carb as a pin prick size hole will stop it running or they could be perished from the old fuel. Hope this information is helpful to you as from 1 biker to another we all know different things that get us stuck on why things don't work. I enjoy all your videos and love what you have done with the TS185 me and my dad are currently restoring an American imported TS400 and watching your TS180 videos have helped us with a lot of problems that we have got on the TS400 keep up the good work and look forward to all your fucture videos. BIG BOY BEN from the UK. Please give me a shout out on your channel if that's ok. Many thanks.

Oh one more thing. if spark related issue try fixing the ground to the head or clutch bracket or something close to the plug

13:08 floats you check by shaking and listening if there is gasoline splashing inside. if it has a leak it will flood your bowl. whenever i have problems staring a bike i transport it uphill from my house, about a mile or so, and by the time i'm back home i've usually been able to roll start most of them.

I believe that you should be checking for spark. Don’t overcomplicate your search. You have compression; there can’t be a stuck valve. So check for spark. If you find you have fuel and spark, try changing the plug. Some plugs don’t create a hot enough spark if they’ve be left out for a long time.

I bought a wr450f and it has the same oil level check "system" as yours... Oil level will show on a dip stick when engine is running for about 2 minutes... those engine require 950ml of oil... check it in the service manual... if you will start this engine with so much oil in it you will blow out the valve cover gasket!

Bruh a "will it run" on a cheap Yamaha????? --- millions of views BET.

Damn!! 🤦🏾‍♂️ I feel your pain ... Don't give up bro!

Nice bike and you done good job ..am sure you'll get it sorted buddy .. I personally wouldn't have bothered putting plastics and seat back on untill i new it ran first .. probably not bothered bolting tank on either ..just saves messing about

Always remove the clamps from the rubber boots, make boots softer using air drier and fit your carb, one fitted bent the clamp to fit and tight them :)

Keep kicking boy

LoL best cliff hanger. Loving it.

Sounds like my XR 600R. I've torn into those carbs about 5 times now, cleaned them as best I could, still nothing. Maybe it's CDI, maybe coil, maybe bad electrical connection... Stator... Valves... maybe maybe maybe half a dozen other things. Every so often... She does start, and she runs strong. I feel for you, but try kickstarting this for months at a time with no progress and see how much you love your bike.

Does matter, that's awesome

You are The best.🇫🇮

On these 4 stokes, they have different oil cases, one for transmission, one for the piston. So, your running the piston without oil. And your trans is full of it so that could be a possibility

Do not twist throttle before or during starting. Not in these bikes. It seems your cam timing may be off. That thing should kick way easier with the decompression cam. Yes I have 3 of these

Move the kick starter a few times then check dipstick 👍🏽

Check for spark? Are you sure the intake was tightened back up with no cracks? Did you check that the slide/ needle weren't stuck from nasty gas?

Bro change that accelerator pump diaphragm ...its bad!

Next time unscrew subframe and drop it back out of the way. Much easier to install carb.

You got this

Check the spark plug. Spray some gas in the hole to see if it starts and runs for a few seconds

Roll start it. I had a old 450 do the same thing after rebuild. Just pull it till it starts. Then mess with you air screw. That helped my bike.

I may be superstitious, but after I get floats set I never tip the carburetor side to side. Jets need to be visually inspected to make sure they are clean. When trying to start that bike, you’ll need the support of boots 🥾 to use all your power to start it. Good luck 👍

Disconnect the hot choke and just let it hang and when you pull the compression lever don't go all the way down only go quarter the way down come back up two clicks and then kick it so start right up

You have compression that's for sure, do you have spark,is the plug wet with fuel? if you have spark and fuel, then it should start, so trick to starting these, as other have said, or bump it in 2nd or maybe 3rd gear, if still not start, might be you've timed the engine 180 degrees out, get a diaphragm for the carb!

I would first check for spark, then I would check the fuel check valve. When your bike was leaking gas and you blew on the gas line and it stopped leaking. The valve may be sticking restricting fuel. You can google it to save me time typing lol. Then I would look for vacuum leaks. Another thing is pour a cap fuel of gas right down the spark plug hole and try kicking it over. Good luck brother

My dad has a wr450 and I will not start if you don’t spray fuel into the engine so what we do is just twist the throttle fully open the closed about ten times then the accelerator pump will spray some gas

I may have missed it but it looks like you forgot the clamp where the muffler connects to the header.... good luck with the beast..

That carb's been SITTING! Any time you clean a carb, take the whole thing apart, ALL THE WAY. Remove everything plastic or rubber. Here's the half-assed method to clean your carbs: Dump the pieces in a bucket of carb parts cleaner overnight. Turn the pieces over every few hours. Rinse the parts outside. Take a compressed air jet nozzle and blow out ALL the channels. Now, put the carb body in the sink under HOT, flowing water. Let the water run through the body for a while. Dissolve any remaining varnish in the channels by shooting carb cleaner spray through EVERY. SINGLE. TINY. HOLE. (Wear eye protection. Or don't. It's your vision.) Use compressed air to blow through ALL the channels, again, and dry them out. Soak the little brass parts in "CLR" (Calcium-Lime-Rust) cleaner. Soak the little steel bits in CLR separately. Don't mix the brass and the steel. Rinse everything well. Use 0000 steel wool to clean all the brass bits. Shoot carb cleaner spray through all the brass bits. ALTERNATIVELY, FOR THE CARB BODY (this is the MUCH better method): Buy an ultrasonic cleaner big enough to submerge the whole carb. (Many low-cost eBay ultrasonic cleaners are scams; they tend to be much smaller than they claim. Get the $80, 2.5-liter unit from Harbor Freight.) Put the carb parts in the ultrasonic cleaner, filling it with a mix of 8 parts EXTREMELY HOT water to 1 part Simple Green Pro. Rotate the parts occasionally with tongs. If you don't change the cleaning fluid after the first half-hour or so, your aluminum will become darkened and discoloured. If this happens, I 'm told running the aluminum parts through the ultrasonic cleaner again in Simple Green Purple will make them shiny, again, but I've not tried this. The ultrasonic cleaner will not harm the rubber or plastic parts. Use the CLR and 0000 steel wool, as mentioned above, for the brass parts. Blow compressed air through everything. First, check for spark! Maybe take off the air filter until the bike starts. Use some starting fluid spray into that air intake. By the way, to remove paint, brake cleaner spray will work even better than carb spray. Cheers.

A tip: never use tap water to flush your radiator out always use distilled water that you can get at wal-mart, most tap water will leave mineral deposit inside your engine and radiator over time, also easiest way to remove/install carb is to take off the subframe, the airbox will pull right off with subframe and after you take your seat and plastics off it is just 4 bolts.

Godda kick it from top dead center brother

the problem comes from the timing of the distribution chain and it's good

Cool project! How much do you think you have into it in total?

Hurry up and get it running we want to see!

I know on my yz250f if you choke it.it wont kick over for hours so i just do 1 light cycle kick then kick it over.also it could be a bad carb.good vid tho bro your very detailed can wait to see you rip that beast.

Bump start it!

Check for spark and take your carburetor off filled up with fuel and give it a couple flicks of a throttle see if your accelerator pump is working after that I look at your stator

needs to be kicked hard enough for the engine to fully cycle 2-3 times... kicking it at the vary start of the exhaust stroke, helps get the rotational mass going to then send it over the insanely high compression stroke. Regarding a 2004 YZ250F I worked on... have to twist the throttle open for 5 seconds, then close the throttle, put the choke on, kick it over 3-4 times, then holding in place slowly turn the engine until it is on the exhaust stroke... at the start of the exhaust stroke you should hear a puff of air out the muffler, crack the throttle a vary small amount, from their it needs to be kicked hard enough for the engine to fully cycle 2-3 times... it can take half a tank of gas for the computer to self learn. start run for 5 minuets, try a hot, cool off, start up run for 5 shut off, try hot start, let it cool off... over 2-3 weeks a knee will be in lots of pain. can relentlessly kick the heck out of it for 30 minuets. could roll it down a hill to start it, but if the engine takes off you will be up to 60mph as fast as ya can get to the shut off switch. can also plug off the de-compressor with a bolt, and push the intake cam one tooth clock wise "to decrease valve overlap, makes the engine vary snappy". i guess if the cylinder was flooded with gas the de-compressor would have a ligament use.

Push start that bad boy

Very resourceful haha much respect. I would have just bought a new jet. 😁

Pull plug see if spark and put a few drops fuel in then the plug back in

I always make sure if the bike is firing through the spark plug

What did u spray on the plastics to get the spray paint off?

Good vid

it was leaking fuel probably because there is a blockage in the carb. i would soak it all in carby cleaner for a few hours and then give it a good brush. more than likely the air fuel section and the pilot.

Do you have the piston rings facing the right way

Your head gasket cannot be re used if you take the head off after torquing it it wont seal properly an you need to really torque it to spec if not it also wont seal right

How about checking if you even have spark.

Ya that excelarater pump diafram needs to be in good shape and working

Check for 💥

have you tried turning it off and on again?

put starting fluid in were the spark plug goes and it should start first kick

Did you change the spark plugs?

Sir, I want to take yz125 2006 used frame. So, how much will you get in money?

Check if is throwing Spark

Id check the spark first its weird id didnt even make any sound with starting fluid

How much money did you have into the 450 after you got it running?

Try to clean the pilot jet and then do top dead center and kick it

There is o ring in the carb that will cause the floats to let gas in

Next time you try and remove paint from plastic or anything use brake fluid soak it a few days and it will come right off won't hurt the plastic

That's a bummer man. Firstly I'd drain all but 1.3 quarts of oil out of the bike. Oil level is checked with bike hot at dipstick in upper oil reservoir because it gradually drains back down when engine is off. See workshop manual. Secondly I'd pull carb and check everything. Every nook, cranny, fuel and air passage. I use a wd40 straw that has been carefully whittled to fit the smaller openings. I Recently found a blocked air passage to main jet emulsion tube on my XR that was blocked. Was driving me nuts. Couldn't figure out how It was rich enough to foul plugs, be a turd to start, and bog/splutter at 1/2 throttle with stock jets. That's all it was one tiny little air hole. I evidently missed it the first half a million times I had the carb out trying different needle positions.

Great job on you videos! Enjoy watching the build. Please Please wear rubber gloves when using Carb Cleaner and other chemicals. You are young, take care of yourself.

turn the idle up i had the same problem

After you get spark you need to a grown up to kick it for you! I would not choke it and pour fuel directly into the carb. And Did I mention you have to kick harder?

Check for the 3 necessitys, fuel, air, spark.