$1100 Big-Bore Yamaha YFZ450 First Ride (EVERYTHING WENT WRONG) 

Hope you get that Yamaha figured out Joe. Keep up the great work. No matter the weather or circumstances you put in a lot of effort to save these old machines. Appreciate you 🤙🏻

If you have to go over three turns with the fuel screw, you need to bump up the pilot jet. These oversquare high compression four strokes will get super hot if it’s sitting idling. They will actually boil the fuel in the tank if they don’t get enough air moving(riding very slowly) to keep everything cool.

Careful with the aftermarket fuel screw at 4.5 turns. They have been absolutely known to fall out when turned that far. Look it up. Best is to bump the pilot to a 55 (which is huge, I know), and then turn the fuel screw back in.

24:28 T0 24:38 the front left wheel is locked solid while you are riding.

That glowing pipe issue had me stumped years ago. Congrats on figuring it out!!!

Voltage regulator is bad . That is the best running bike on the channel so far !

Hey Joe, does that front left wheel spin freely? Noticed it sliding through the snow, at one point, while the right one was spinning.

Bro I watch your videos all the time and can’t wait till the next one comes out keep up the great work you’re doing and hope you and your family are doing great love Malcolm from uk 🇬🇧 my favourite utube channel love it bro 😎

You don't have a working charging system, it is running on battery voltage until the battery can no longer power the electronics. It should be of no surprise the radiator fan doesn't have enough voltage to work and it begins to overheat. Stop riding it until you have a solid 14+ volts at the battery while running.

31:04 there’s a big spark and smoke coming from the left side of the handle bars

O yes, I really enjoy the videos, keep up the Amazing AWESOME job and content. Good to see someone from Wisconsin doing great things!

When you drop spark plugs down the hole like you did there is a chance of knocking out the gap clearance. You should have placed a length of 1/2 inch fuel line on the end of the spark plug and turned the plug in. the same for removal. This also works on the HEMI engines!

Great job joe your getting ther mate it's defo a cracking quad sounds brilliant pity about the problem at the end but you will sort it mate take care and stay warm 👍👌👍🔧🔧🔧

When are you gonne do dirtbike projects? Love thid content. Keep up the goof work 💪💪👌👌

In the previous video of the yfz450 I had written to you to open the mixture screw to 3 1/2 turns, it is good that you open it more and the problem improved

Before you go pulling it apart to check head gasket go and buy yourself a test kit that tests if combustion gases are in coolant. Your water pump spins so that will also cause the water to push out of the fill port when you're reving it. Same thing a car does when you have the cap off and rev it

Joe put a bigger pilot jet in your carb , you shouldn't have to turn fuel screw out that far

As always great content Joe

Awesome job I just learned something new thanks

Some engines do not charge the battery at idle. Try revving it up and see what the voltage does. I doubt the stator is shot.

I have same wheeler with bige bore. I installed a cbr 600 battery and that is 180 cca. And also bolt on battery charger for better charging. There is a little cutting by the battery area to fit the bigger battery.

Like you said, People say that a hot pipe is normal for that machine. That shouldn't be normal. That's just bad design.

Great video as always screw that shit man learning experience working on stuff and your good at what your doing keep videos coming bro sick 4wheeler

Really hope it sorts itself out, seems like you really have a lot of fun on it

Great video. I have a 2006 yfz 450 that I need to start working on and your videos will get me motivated. Just an fyi, you need to install a kickstart b/c the batteries suck.

Man you made me cringe when dropped the spark plug down the hole, the socket is supposed to hold onto it. Not drop it. You can mess the gap that easily. Love the content. Keep it up.

You have to account for three things, Elevation-Temperature-jets, lets say you have proper jetting already. When its colder weather you have to add about a quarter to half turn on fuel screw rich, Listen to the rpms very closely after each slight turn on the screw, Find the happy middle point, where its not too extremely high/fast but a nice solid idle, Your pilot jet is for idle/low rpm, Your Main is for 70% to 100% throttle, if its spitting and popping depending on the color of flame it is either too rich or lean. Only turn and adjust fuel screw when the motor is at operating temp. Start up procedure,(cold start only)*,( Key on, Ignition on, Pull choke out, Blip throttle once to get fuel in carb, turn on bike, leave choke in for 5-10seconds, Turn off choke, after once warm adjust fuel screw. Keep a Battery junior 800 Battery Maintainer on your battery so it always starts up 1-2nd time, When in storage for long time and u have the gas turned off for carb during storage, turn it back on, then on cold start procedure blip the throttle 2 times and let it wake up to its normal idle

What a beautiful quad!.. she sounds amazing man 👌🏻!!

God damn buddy just ain’t having much luck rn lol I feel ya you’ll get it

Loving the long vids!

I have an 08 KFX450 I’ve had for 7-8 months been having the same starting issues..I’ve done everything the same as you so I’m gonna take your lesson and use it and pull apart my kill switch and clean it

Great video man

Love this stuff

Love the yfz 450 my favorite quad not just because I own one 😂 great video keep up the good work bro

Have the same quad 2004 yfz450 automatic decompressor was my problem but mine turned over a little bit faster since I had stock compression ratio . I heard it is a common problem on the yfzs... you can alsow put a kickstart mecanism on it if you dont want to change the cam . Nice video man

That's pretty crazy that coolant is doing what it's doing. I would suggest maybe a catch can or something? The high compression and vibrations is just blowing it around

Enjoying this quad .!

When you change oil filter write the date on it, even with fuel filter. Always enjoy the vids, keep em coming. 🍻

The cinematic shots were nice!

Bro that pop at 31:04 though 😬.. u could even hear it on the video.. anyway thanx for the videos.. u one bad dude and your videos keep getting better.. did u ever find out what brand big bore is in that quad..? I got a buddy of mine that wants me to install one on his 06 yfz450... also I just finished building my very first yfz450 (had bad piston n cylinder /broken valves) any way at first it was leaking coolant (after first start up)and then after it stopped I think I overflowed it.. but now runs good (semi good lol only choke on 🤪 got adjust carb) anyway my headlights won't turn on i checked a bulb looks good and when I hit the switch to turn them on i hear a click sound coming from maybe area around cdi I think there's the rectifier or some electric box.. so I assume they are trying to switch on but nothing.. what would you check first.. btw mine is an 07..also I gotta mention that my light switch is broken from the part were you switch from engine run or stop...might that be it? Once again u one bad dude...hopefully you can do a raptor 80 soon. 😃...

Front left wheel locked up 23.30

Back in 2007 I bought a brand new raptor 700 and it would do the same thing with the coolant, the stock pipe would also glow red not long after starting. Not sure if this will help you or not, love the videos man.

this is more like the real life shit that happens !!! had a few of those days just lately. sometimes you have to put the tools and toys away and go and do something else. how you are messing around with bikes in that temperature is a testament to your dedication its either that or your just nuts😀

Not sure if you noticed joe but the front left wheel wasn’t spinning just after you got her started in the snow with the screwdriver in your hand 👍🏼

Don't worry about the pipe glowing. My dad has one, it will pretty much always do it

If you suspect a short, measure the current instead of the voltage when attempting to start it. If you measure the current from the battery and the current going to the starter, the difference in going somewhere. Without the head lights that should be no more than 2-3 amps.

If you have to pull the head off for sure check that it's not warped. A mirror and valve grinding compound will show if it is. I used to have one mounted on an old counter top for support. If warped tape a sheet of 400 to the mirror and be patient.

if your fuel screw is out more than about 3 turns, thats an indication to increase the size of the pilot.

Very informative when you explain this thing goes in here like that. Need more detail 😂

Try changing the voltage regulator for the charging issue

Correct me if I’m wrong joe, but I think I seen an ark of some sort right at the first bend on the header at exactly 11:27 in your video, lemme know what you think or I’ve I’m just seeing things! Love the videos btw, I never miss a vid!!

There should be a voltage regulator on the quad that regulates the voltage! Look for it somewhere on the frame Square with wires and cooling fins..

Yfz450 power brother 🤘🏼🤘🏼🤘🏼 some times there a headache but best bike in my opinion

I wonder if the oil modd is done on this bike I know that could take the engine out and sometimes even the cases

hey man, do what you do everyday just dont vlog it, but was watching this and noticed you checked coolant while bike was hot/warm, looked like that anyway, pressure will be created when its hot from being hot and water pump forcing coolant around, you open that up hot and thats the weakest leak its gonna come out there, id re check the system while the bikes cold, if it still sprays out of fill area when cold then its most likely pressure in system, if it doesnt i dont think itd be head gasket, plus it didnt look like it was dropping white clouds of smoke. Just thought id throw this in the mix so you dont have to rip head off if you dont “have” to. Goodluck!

I’ve never clicked on a video so fast haven’t finished it yet I’ll comment when done

Love the video's! If not charging it would be voltage regulator.

You are an amazingly fun mechanic

Get a Noco boost plus jump starter it the best one to Carry around I always used that for my truck and bikes and it fit in your pocket

Dune cupped rears will hook up like crazy.. fun in snow!!!

Finally a win I'm glad to see that hopefully the Quadzilla can be sorted out and fixed which we all know you're going to do love the content keep it up

Pretty amazing how good it runs and how quick it it forest up when ele trial is all good huh. Lol the smallest connection on the quad. Of course it was lol

check your auto decompression stuck thermostat. also make sure you bleed the coolant system any air will make it over heat

I just realized your front left tire wasn’t even spinning after you tried to restart it the first time..the yfz is a very high maintenance bike legit so if just the smallest thing is out of whack she won’t run right….

rebuilt my sxf 250 and the old head gasket was 2 metal plate gasket and the new one was 3 plate one. The new did not work, changed it to the old one and works like it should.

24:30 why isn't the left front tire rotating? Sorry, if I missed it, I skipped around.

On some of these machines they won't run correctly with the battery disconnected. So it makes me wonder if the headlight wiring helps to regulate charging.

the fix is always the last thing you find broken lol

I think it's more the water pump buddy you would need to fill the rad full and run it and if its fizzy like pop is then yes but it will foam and bubble reving it like that so just a quick check will sort it 👍

Don’t you have to break in the quad since you rebuilt it ( break in process) ?

No joke, I was gonna mention the decompression mechanism until u said u had it figured out with the wiring.

10:18 My ears lurked up when I heard the sound of the that exhaust!!

Just a quick question. When the parking break is on, what tire or tires does it control? I'm asking this becouse, about 24 minutes in the video when you were having the issues I noticed that the left front tire was locked up, or at least not spinning free. I'm sure someone probably already noticed, but just want to make that aware.

Check ignition timing can cause headers to glow red ,not sure if it's the same as foxbody mustangs buy I have had a similar situation and it was the timing

You've got way more patience with those things than I do. I would have that sob in a creek bed in flames with my insurance company on the phone filing a claim already haha

In my experience, those kind of batteries are junk. The best ones I’ve found so far are Yuasa brand sealed gel batteries. They last a long time and perform well even in the cold. They are a bit pricey though.

Just find headlights add them on and that'll solve the charging issue. Instead of the kit. Plus itll probably be cheaper and you'll need headlights anyway.

I wanted u to hit throttle with that multi tester on the battery maybe it pumps more power as it throttles up. Could be cold might work in the summer

The coolants system has an air pocket, you have to let the bike run and get up to temp with the radiator cap off. That is the whole reason for the coolants looking like it has air in it

is it charging now and will it start without the jumper pack

Don’t know if it makes a difference but my 2005 YFZ 450 well only charge the battery when the headlights are on high it always have since I bought it new

Bring back ya old simple yz490! Your getting there tho !

When it first cranked over slow a stuck compression release was my first thought

Lol it’s always the last thing you look at bc it’s the least thing that would make sense keep it up dude

Your crank might be bad. It cranking over slowly could possibly be a crank with a tight spot.

Hey i really need help my 04yfz450 has no spark can not figure out why

$5 for a spark plug isn't bad I had a 96 RM250 a couple years back and the factory plug was $30. Lol

Tons of power in this thing! As it stalls lol

At 0:26 I see the quadzilla banshee for a future video I'm so excited

at one point you were driving with the front left tire locked up lol boss u sure the starter isnt to small for that big bore>?

That’s so funny lmaoo always something stupid and I seen the front left wheel lock up or something after the first ride at your parents

Always start with the easy stuff.

Are you sure the battery was charged 100%? it seems really weird that the stock battery barely cranks the engine over. maybe it is losing charge from a parasitic draw?

voltage regulator problem (ac to dc regulator) usualy under rear fender (black box with air radiator on it)

Can you try and get another banshee for the page and do top end rebuilds and videos on it please

she is very lean!!! new battery w/ 3 times the cranking amps but still needed the jump pack? but you fixed it in the garage an started it with a handheld jump pack? im assuming you have not fixed it, an just bs the camera. who knows lol

You have to rev the bike up to 4k rpm in order to test the charging system. At a steady 12.8v at idle thats good

Welcome to the yfz450 that's why everything on it is quick release your under the gas tank more than you are on the seat and that's no joke

Did you notice that your left front wheel is locked up and not spinning in the snow that's going to cause you some steering issues there

RM stator and rectifier. Stock won’t do anything with the headlights off.