General Discussion Forum

LOL all I can say is that I'm glad I bought a Honda. No I cant help you, I'm not the one who doesnt know how to ride the bike properly. All my friends who race an 06 yz250f have only had their top end go out, but this clutch thing. IT sounds like you may be running your bike low on oil, or maybe shifting very very incorrectly.

 

Are you fanning your clutch still like a 2 stroke? You don’t need that much clutch action on a thumper. If you find you are fanning your clutch all the time to keep the “R”s up,  try dropping a gear. I don’t know your riding area, but it sounds like you moto, so maybe try adding a tooth to the rear. What type of oil are you running? I don’t know if Yamaha has a split system, but you don’t want a molly type oil in with your clutch. It will cause it to slip.

Like Some Old Vet said; if you came from a 2-stroke and use the clutch like one (2-stroke) on the 250F's you can fry them in no time.  Thats a weak point on most of the 250F's.  The clutch is about the same as the 125 2-strokes; but the 250F's make a lot more torque.

Yamaha is no worse than the others; and actually the Honda 250F had a reputation for frying the clutch if used like a 2-stroke more than Yamaha.

Pro-Circuit among others makes heavy duty spring kits for most of the 250F's.

i dont think the springs would be the problem. well?.................... mabe. im gonna keep shut on this one.

The problem is just slipping the clutch like a 2-stroke; the clutch heats up and fries the plates in no time.  The heavy duty springs just help it not to slip (and heat up more) as easy.

so......... wait. am i supossed to use my clutch in the corners? i dont use it to get the rpms up. i just use it to downshift. is that ok? or should i let the clutch out before i enter the turn? does this matter? wow im an idiot. i need to take my helmet on the bus when i start school in a few weeks! lol.

You can use it.

On a 2-stroke its a very common practice is to slip the clutch to get the engine up in the power band coming out of a corner or hill etc if its a bit below it vs down shifting (or to get a really good launch out of a corner even if you are in the power band).  Its still harder on the clutch than if you don't do it but its very common practice with 2-strokes and in the case of 125's the clutch would generally handle it (unless you did it all the time).

The clutches on the 250f's are about the same as the 125's were (are).  The 250f does make a few more ponies but a lot more torque so if you slip the clutch a lot with them it tends to quickly overheat the clutch.  The added torque of the 250f basically negates the need to slip it like a 2-stroke anyway.  I think it was the 2004 Honda 250f where if raced by a pro you could expect to replace the clutch every few races.

On my 250 2-stroke I keep a finger on the clutch all the time (to slip it if needed or to upshift).  I generally use it to downshift but not always depending on circumstances but I always used it to downshift my 4-stroke.

let the clutch out everyonce in a while