I use CP pistons and Cat 3 cams from NRHS
what pistons besides wiseco? at 8200 miles dropped valves in both cylinders at 6000 rpm/anybody use andrews cams?
I use CP pistons and Cat 3 cams from NRHS
An extremely rare catastrophic failure... and simultaneously in 2 pistons?
Whats the whole story sandman? Your use/abuse would dictate what new engine to build that will last, because stock obviously ain't enough for you
I agree scorpion king. Seems like a bit of info is missing...
How do valves just "fall" into the cylinder? Ive never heard of this on any bike or car/truck.
Maybe he's one of those people who like to rev until it bumps off the limiter in neutral for an unlimited amount of time.
A valve spring or retainer would have to break, and the result would be catastrophic to the head, the piston, and probably the cylinder too. Ultra rare to happen in even one cylinder, much less twice at the same time. I'm sure the OP is just guessing for now, I'm real curious what he finds. Crank pin?
Are Buell engines interference engines? Not that the gear driven cam would ever skip, I'm wondering if valve float at NASCAR rpms could even touch the piston?
In this case it would be all 4 breaking... and at the same time.
His fuel pump probably went out.