how?

[njquadracer11]

last week i had new valves and springs put in my race bike...the motor was a je 13.8:1 470cc piston, hot rod crank, stage 2 hot cam and head work....after about 10-15 laps at my local track and intake valve broke and destroyed my motor, cant save anything in the top end...any ideas???

[Scro]

Wrong timing causing piston to hit valve?

[njquadracer11]

there was no sound of valve tap, and the valve showed no signs of tap

[eastside 400]

kibblewhite?

[bad450r08]

My kibblewhite valves have over 100 hours on them

[njquadracer11]

no they were stock honda

[eastside 400]

my guess is either just a part failure or something wasnt installed/machined correctly. any pics of the broken valve?

[njquadracer11]

its embedded in the piston...it wont let me load pics here

[Ruf Racing]

Looks something like this? :ermm:

http://i532.photobucket.com/albums/ee328/RideRed187/450R%20Pics%20Parts/c8d4832a.jpg

[fastredrider44]

I got some pictures exactly like that.:mad:

[njquadracer11]

dude it looks like you took that outta my motor lol...identical

[Ruf Racing]

I feel your pain. :(

[njquadracer11]

dude when it happened, it sounded like i was holding the kickstarter down just 10 times louder lmao

[Ruf Racing]

Just like a Jake Brake, on a semi-tractor! :uhoh: :eek: