[SmoothDog0]

my xlt 800 has dided on me, the rear cylinder has what looks like smashed metal bits inside of it, i removed the head, and spark plug i have included pictures of both, what could be causing this??

i need to figure out what is causing this before i even rebuild the top end.

thanks in advance!

 

[Ernest T]

Failed power valve? You need to do the power valve clip upgrade if you haven't already as a part of the re-build: Yamaha 800/1200 PV Powervalve -- SBT Jetski Engines, Parts & Accessories