DROPPERD VALVE Hi, I recently purchased a 2006 model XTX with 500ks on the clock. At 2000ks and taking bike up to the rev. limiter,(no rev counter) a valve dropped and did the piston in. Is this common on the yamaha 660cc XTX? Yamaha said they wouldn't cover the repairs even though the bike is only one year from purchase, and in the warranty period, if this was due to over reving. Isn't a rev limiter supposed to stop over reving, with it's electronic cut out?
Mitch