No Compression After Fall YZ400F
Posted July 04, 2011 - 06:19 PM
im new to this site and after searching around for the last two weeks i cant really find something which really resolvs my problem.
after riding for about an hour i dropped my bike on th left hand side while trying to get off... i then got back on and staqrted it for about 30 secs and let my cousin go for a when he got on the bike he did the exact same thing!!
i picked up th bike strait away and trie to kick start it with absolutely no compression???
the bike has just been fully serviced and gaskets replac and the techs at yamaha state everything in the motor is running fine IE bottom end, top end valves, cams and everything..
im stumped.. what could it be? im thinking a stuck valve but how would i be able to fix that anyway? what else do you think it could b?
any help would be grand.. Thanks fellas
Posted July 04, 2011 - 07:29 PM
If so, you might have a bent exhaust valve.
Your description doesn't really mention whether the bike was running when it was dropped, so it's just an idea. I may be wayoff base, but it was the first thing that came to mind.
Posted July 04, 2011 - 09:45 PM
Thanks for the suggestion. no, both times when the bike fell the engine was not running.
I do have a compression lever on the handle bar so i might have to chack the valve
but the first tim it dropped it started right away but the second time ,, no compression..
Posted July 05, 2011 - 03:14 AM
Posted July 05, 2011 - 04:22 AM
Posted October 16, 2011 - 07:10 PM
Edited by Sebastian Pavich, October 17, 2011 - 06:59 PM.