you may not read this but your rear chain slider is on backwards it should probably be fixed before it breaks and causes more damage. just figured i would give you a heads up happened to my banshee and it toasted my output shaft bearing and messed up my transmission.
Glad you fixed that older YFZ450! These are probably the BEST all around sport/race quads ever made. Older ones are great too. Fuel injected models are best ('09+).. but ANY good running/well maintained YFZ is excellent. I think 1yr ('06) had an inherent oiling issue (was easy fix @dealer or online many ppl posted the fix) that's it! Can still buy one brand new says alot. Keep sport quads alive!
04 was the first year, 06 received some good changes with fixing the charging system and new swingarm, 07 and after the oil problem was fixed. I am a HUGE fan of the carbed yfz's..
Good built and tuned carbed yfz will smoke a FI yfz anyday, my 13 carb yfz was dead even with my buddy's 23 yfz450r , but since I've took the factory mikuni carb off and put bigger fcr carb on , and it's alot faster now , the carb quads make more hp with same mods
Agreed they are a lot of fun, good work! My Honda 450F quad is torquey as hell. I bought a 2004 CRF450X with the same motor and that bike actually scares me… lol
These videos that he makes are some of the best videos I’ve ever watched. I love four wheelers and love riding it so cool to watch him fix them and ride them so much and see how they work.
you may in the future want to get new head bolts cut grooves in the old ones so you have a home made thread chase. The engine is near 20 years old and grease oil and grit will take up some of the stretch. Just an Idea I've cleaned plenty of LS engine blocks this way and you wont believe the junk that comes out even after spraying brake clean and compressed air
Basic step one replacing a blown head gasket where the head and the cylinder are both aluminum is to check the surfaces of both to make sure they are flat and true. I didn't see him do that in this case. This is especially true if improper torque procedures were done sometime in the past.
Unlikely to happen and usually don't even bother checking and mine is always fine not that I've ever really blown one I've just replaced them doing top ends
I don't care if it is a V8 or 1 banger, warpage is a common malady that MLS gaskets cannot cover for. It is a MUST to check for warpage. Annnnnd, either go with an ARP stud kit or replace the TTY bolts. Any time the torque pattern involves following a torque number with a 90°, 90° (180°) final, we are dealing with TTY. These are notorious for stretching and at high rpm, the head will lift. I live in Colorado, not far from the Continental Divide. That stretch of I-70 kills Subarus due to people railing up the pass for extended high rpm, 90 MPH travels. I get to do head gaskets on em frequently. Same thing happens with the Quad being railed at high rpm. Especially when TTY bolts have been reused.
It's an old machine + can tell when he 1st got it ..was marginally maintained. If I were him & he KEEPS IT..def put FULL SYNTHETIC 10W40 (Mobil1 4T racing 10w40 is awesome) & he should if that's his only YFZ. They are amazing sport /race quads. Best all around high- performance quad ever built most say. I have a "very well maintained" 2010 YFZ that's never needed any engine work as of yet. Perfect compression etc.
Oh yeah buddy she sounds so much better then cylinder temps just had to have been through the roof for it to make the coolant boil that fast lmao egt’s must have been absolutely crazy lol
This yfz would be my first nomination for a 4x4 drive system. Reminds me of a friend of mine driving home his ls7 corvette. When he hit the straight of way he said he could never match his rear wheels to the speed he was going in snow. He ran off onto the tracks rolling over. The battery came loose striking him in the head. Too much power.
tuning 101: lean it out until it overheats at idle and exhaust glows red, then go back up a couple jet sizes. Gotcha. Man, if only they made an affordable sensor you could use to get it right the first time...
Those head bolt are torque to yield bolt. Suppose to go to like 40lbs than back down to 30lbs. That means its torque to yield. Those bolts are meant to stretch. Should have looked into some aftermarket head bolts
Hey Joe I bought one of the Niche kits for a Polaris 400L top end complete . The piston clearance was within spec but the bore needed a small cleanup and hone and the ports definitely needed chamfering. $55 No studs pulled out Starts like a new car Runs perfect Just have the Niche kits FINISHED by local machine shop . Great fix today Win !
The cheaper kits do work most the time but even when they do they wear out in half the time that's the catch u save some money but then ur rebuilding a lot more frequently I've tried them all on my bikes and ended up going back to the better brands
i check always at surfaces are both flat's before i put new casket and right way to done all its in Aluminum heads you should , Iron heads can be re-torqued when hot, the head bolts may expand in length when warm more than the iron head. Otherwise the head gasket may settle some when it gets warm.
Man, you gotta consider moving to a warmer climate .... no reason to suffer every winter and having only 2 months of summer ... it gives me flashbacks of sufferimg in buffalo ny ... shoveling snow is a sucker move 🥶🥶🥶🥶🥶🥶😪😪😪
Hey Joe. Never use your torque wrench in reverse, and if using it to set a certain degree, set the wrench much higher than initial torque setting or its better to use a breaker bar. The head bolts stretch and should be replaced every time they have been torqued. They may or may not last. Either way good luck.
@@crboi6440 I'm just trying to help and give good advise. I mean zero harm. Joe is still a rookie but he has gotten so much better. I don't need to watch his videos as I learn nothing. I like Joe and support what he does and his willingness to go above his skill level and learn. I'll correct myself, Joe has inspired me to make my own videos. I guess if you don't like my comments you can give them a thumbs down. I don't mind.
Throw a new iridium plug in it Joe while you can access it easily! They start quicker (saves starter) & should improve performance ever so slightly. Never heard of YFZs goin thru head gaskets? You mustve meant THAT yr you have! Never knew that just '06 oiling issue. Btw, have NGK iridium plugs in both my quads ..'10 YFZ450X & '21 Raptor700R-SE . Even bought a few for an 06 RM85 i just got. Not sure how good in 2-strokes.. anyone tell me if its a waste of $ or not. Thanks. - Ohio
Hey there, love watching the channel. By chance have you posted a video for a Yamaha Timberwolf 250 99' model? Trying to find some info on one. Picked one up that runs but would like to service it. Looking for specs on how much oil, air filter, oil filter, and anything else I should service. Looking forward to your response.
Sometimes you have to spend some money on good gaskets like cosmetic MLS gasket , I built one where I used ARP studs and nuts cuz it keep blowing gaskets
Oil or coolant on the surfaces can cause the viton coating to slip as well (make sure it is CLEAN!). Cometic are definitely a step up from many others, they must have their own supply of coated stainless stock, as the cheap brands all use the same material. If it doesn't have the black coating, don't bother, the clear doesn't work more than a year. I've had a few cheap brands leak between the plies as well, not just between the gasket and head/cylinder
Cooling systems work under pressure you must bleed all the air out of the system top it up and put the radiator cap on never run the motor for extended periods of time without the radiator cap on
Probably a bad fan or fuse caused it to heat up and ruin the head gasket. Would look into that. My honda cbr600 will blow the fan fuse sometimes, especially when hooked up to a jumper pack.
@@plkracer lf the fan is on when the bike is brought to a halt, the engine should be kept running until it switches off to keep the coolant circulating round the hot areas of the cyl. head.
I had my XX out in the snow just like that today... I didn't keep it out long because these conditions are really hard on race bikes! All the reving and spinning will cause Carnage if you over do it
I agree ..really surprised me as well. I take it the bolts were stretched plus he used gasket adhesive too? *I wouldve replaced the bolts its an '05!!! Joe was quite surprised too!* He's getting really good at this. Give him alot of credit..he took alot of flack early on.. has alot to learn yet.. he's 75% the way there tho + well rounded on multi brands is good attribute.-Ohio
I recently bought a 400ex and I was wondering if you could just tell me if you know this issue. The issue im having is that when I have the throttle about halfway pushed it makes a rattling sound, its in all the gears. Do you know what this issue is? I would really appreciate it, thank you
I find it amazing that folk just learn to live with the snow, it would really piss me off if we had to put up with the stuff for more than a week as we do in south of UK once a year. its like the end of the world if it lasts more than that. just cant get my head round it why would anyone want to work live and earn a living in the stuff. lets go ice fishing.......no chance im building a damn fire
They are #1. The only sport/race quad you can still buy brand new. That says alot! Was best selling thru yrs cause Yamaha is all around the best @ performance 4-stroke tech ..followed closely by all others. You may have never owned one.. but since the fuel injected models ('09) nobody's been close. Watch old online tests/reviews.
@@datssan Wow.. that must be sweet. Who makes the big bore kit? May need do that when my '10 YFZ450X Bill Ballance finally needs rebuilding. Motor still runs great tons compression. I'm really big on maintenance tho.
@@bananabrooks3836 it should still be above the 90-95°c mark to cut in the fan in my eyes. I get what you're saying though but that coolant for very hot very quickly and I think the sensor would have caught that... If it works.
Man I miss my yfz450. Thing was minty after I put some time and money in it then everyone I know decided to sell their quads and left me with no where else to ride lol I’ve heard that 2022 or 2023 will be the last year the yfz450 will be imported to the US I hope it isn’t true
If that front wheel locks up again cheak out the wheel baring happend on my buddys wheeler going down the road and if the head gasket blows again cheak how long the head bolts are supposed to be mine stretched and I put 8 head gaskets in and I couldn’t stand it
If you had to do this something is wrong. Yamaha(and other good manufacturers) do lots of testing in all conditions before specifying the final cooling system components.
@@bananabrooks3836 nothing wrong just an add on for occasions in the real world-example - tight trails on hot days-night riding where u have to leave lights on and bike running
They r mostly on motorcycles bc u dont use the bars to turn as much u use lean. So on a quad u tend to twist as u try to turn the bars and it can make for a whiskey throttle situation. Some people put them on race quads. I feel like u can rev them up a bit faster than a thumb throttle as well or at least it feels that way.
Sounds likes she's kicking ass lol I never had a 4 stroke quad b4 but you could b changing my mind lol 😆 have you ever thought about putting a v twin engine in a quad maybe like a sv 650 engine or something similar. Think it would b interesting 👌😁lol
