Originally Posted by %Yanlei%

Hi all,

Something really wierd happened today. Picked up a new Ninja .21, Murnan modified full ceramic, pre-run in...Ran great, did 1.5 litres through it on the first day out without leaning the top or bottom end too far out. The engine ran fine all day. Took it home to check out the internals for the first time to make sure everything was ok and I found something wierd had happened.

There were two 5mm long triangular shards of metal in the crankcase...but no other evidence internal damage whatsoever. It seems that the pieces had not been bouncing around either as the inside of the case and other internals looked fine. The pieces turned out to be from the bottom of the exhaust port side of the piston. That has not happened before with my other .21 Ninjas. I guess that I will have to replace the damn thing as the balance will be all out etc. etc.

Anyone had a similar problem with a Ninja? Plain wierd considering the engine was not run hard in the slightest and still on the rich side...