how can fix clutch rattle/judder on my 99 r1 yamaha?

Question

have fitted new plates and new steels and spring

Answer 1

There are a lot of good answers so far. Here's a couple more - Check the tabs on the friction plates for wear.
Remove the clutch basket and check the springs in the back of it. If they're loose, replace the basket (shake the basket, can you hear the springs?)
Check the needle bearing the basket rides on.
Check the clutch basket and oil pump drive gear surfaces.
Check the gear teeth on the clutch basket and primary drive gear.

Answer 2

Sounds like the plates are shot.

A bike clutch has friction plates separated by steel plates. If the clutch has been abused (or has high milage) then the plates warp giving you judder and rattle. Actually the rattle sounds pretty normal, most clutch noise disappears when you pull in the lever.

the cure...........buy a new clutch......drain the engine oil, remove the clutch cover and remove the plates REMEMBER THE ORDER THAT THE STEEL PLATES COME OUT IN!

the steel plates should be flat, if they are warped or kinked then they are fooked too and need replacing otherwise the problem will not go away. fit new clutch springs at the same time. Barnett do a heavy duty clutch for most bikes (more expensive but well worth it) and these take lots more abuse.

nearly all mail order sites do clutches (www.mandp.co.uk) for example. Steel plates have to be ordered through a bike shop.

Answer 3

First off make sure your throttle butterflies are correctly balanced, One or two out of synch will make the motor surge and slow again at idle, inducing clutch rattle.

Take a look at the fingers on the clutch basket, are they grooved badly? this can cause rattle and snatch. If basket is worn, replace it.

Sometimes the metal plates are "timed" to the driven clutch hub and getting this wrong can cause clutch judder, drag, snatch and noise. Did the plates have one side ground away with a tang on it?

Sometimes there is a narrower clutch drive plate that goes in first, or last to improve feel, if it shouls have one and you didn't fit one, but one same as the others instead, it can cause snatch.

Sorry I'm a mainly a honda technician and only have yamaha experience up to around 600cc but they are worth checking.

Answer 4

are plates fitted right? steels have a sharp edge and smooth edge, they can get hung up but its more likely that you need a new clutch hub and basket. You did check for wear and grooving on basket/hub? make sure adjustment is correct. try different oil. dont use automotive oils, particularly if they have 'friction modifiers'
Dont do clutch wheelies

Answer 5

Make sure your running the right oil. Sometimes it's better to run a premium grade oil. But most importantly, make sure it's the right wieght oil.