The Yamaha Yz 490 is FIXED!!! (INSANELY FAST)

Anyone wanna take bets that it still doesn't run right.....

Go watch Kaplan Cycles on YouTube and you’ll see how a big bore two stroke should be running.

You should’ve changed the air filter and the spark plug since that’s the simple stuff, maybe it could help

This is terrible. Watching you hold the throttle all the way open and not even get a small wheelie killed me. You got a lot more tuning to do boss, thats like a 1/4 of a 490s power.

Everything u ride is so said scary fast. I haven't heard the powerband open up once. Stick to ur mopeds

This tool is a next level hack.... So embarrassing to watch... He should just stick to his mopeds...

Oh my God that YZ 490 is so off. Not even close to running the way it should. That bike needs a new top end for sure. This bike is on its way to blowing up soon that's why the guy sold the bike so cheap. Someone please rescue this classic before Charlie blows it up.

Something is still off. My YZ490 could rip a wheelie in 3rd with minimal effort and the throttle response was amazing. Sounds like u need a carb rebuild because this thing is still boggin.

Clutch is slipping Joe. I don't know if you can tell but it sounds like you're in the same gear every time you shift. I don't like to be negative just try to help you. If it was running right, I guarantee you would not be able to open it up like that. Every gear you should be on your back wheel. Re jet it and try again.

For the love of all things Moto, someone please rescue this poor bike.....

4:30... D'oh. 😂😂😂 O man you haven't got a c

That bike is not fixed, it clearly is not hitting the power band. Why throw up click bait titles for this? Just spend some more time actually fixing it before posting a video.

That front wheel would be constantly in the air if that was running right

I still don’t understand the thinking behind spraying the brake rotors with wd40

Pretty dang close on the jetting? Your running a 40 pilot when stock calls for 50. That is a 20% difference. That is not close. The only reason it runs slightly better on the bottom end is because you leaned your premix to 40:1 allowing more fuel to get through the jets, but you now have less lube in the gas for that massive piston and bearings .That is a bad idea. You will cook that motor. This bike was probably set up for higher altitudes. Put stock size jets back in it, go with 32:1, 3rd clip on the needle. and ultrasonically clean your carb.

This guy gets so many hates😂😂😂 I just came for the comments😂

Have you checked the exhaust isnt full off gunk and crap after 30 odd years, also repack the rear silencer... and check the float height is set correctly this make a huge difference as ive just found out on my 2017 ktm exc 250

I had the 87 490 it was rapid they called it the widow maker back in the day

WD 40 soaks into brake pads and ruins them

As someone who remembers the YZ from the 80s... you're nowhere near fixed, the whole YZ range was fierce and the 490 was only for those skilled and experienced riders who could tame it, if you're calling that "insanely fast" then lord help you if you get it running correctly!