possible fatigued springs are at fault. seen that happen before.
Bet that duc's owned by the hands of a stunna.
"yeah dude...like, i was just revvin the pissed out of it doin a 2nd gear wheelie at 165 k's and next thing i know peices on the floor. why would that happen man? "
RICHES BEFORE BITCHES
People who never do any more than they get paid for never get paid for any more than they do.
– Albert Hubbard
Thats what happens when you don't buy Japanese products.
When speeding run from the cops, it's a lesser infraction.
the other person said it happens to his friends yamaha too ?,anyway maybe you are right
have they found you bike yet ??
It's not the springs that fatigued. Rather it's those posts that all let go.
I'm just guessing on this from the pics but it seems like the spline that hold the pressure plate (the cast bit with all the holes and spines on it) must have let go and allowed the engine to spin the pressure plate against the spring retention posts and cut them off like a pair of scissors.
VERY nasty bit of work.
A backyard mechanic without a service manual is just like a hooker without a lamp pole.... they are both in the dark.
In the pic "postssidebyside", the 'posts' on the right looks like they failed predominantly under torque loading and the two on the left looks like they failed mostly under tension (doesn't have the clear 'cup and cone' fracture surface because it was not under pure tension, maybe?)
Any idea what these posts' function is in the clutch mechanism and are they made out of cast steel?