Hello Again. My girlfriend just purchased a brand new Z 250 because she could not get the hang of shifting my spare warrior. When we first got it it would vibrate badly at idle and take a few seconds to wind down after hitting the trottle in neutral. Even though my z400 never did that, I figured that it would all stop after the break in period. That vibration has stopped for the most part, but now that we have about 4-5 good hours on it there is a considerable amount of engine noise (chatter) up near the top of the head. (valve area) I know the valves need adjustment after the first 10 hours, but I have about 20 hours on my 400 and the engine is still as quiet as it was the day I bought it. Do Any of you 250 owners have any coments or suggestions. Thanks

 

I had that minor problem it was not that noticable but I heard it, so I decided to put 89 octane instead of 87 and it gained a little umph and the noise lessend conciderably

 

OH and turn the idle setting down if it takes a few seconds to idle back down after revving it. But do this adjustment when it is warm! The istructions for it are in the owners manual...

 

mine did that too, but not alot so I to tried a higher octain and it seems to quiet the noise