chris c Posted December 13, 2008 Share Posted December 13, 2008 well i messed up I was tightening my tensioner just as the book said took tensioner cover off turned engine counter clockwise a few times till the plunger stuck completly in then tightened the adjuster bolt and lock washer turned it over and the plunger moved in and out again i think the chain slipped timing marks do not line up no more under the left cover also the engine is locked it will not turn no more you can turn it back a little and then forward to the same point i think my valves shot down on top of the piston shouldnt have hurt anything as i turned very easily and did not hunker down on her just what should i do now all help is well appreciated thanks alot christopher 1980 yamaha xs850 Link to comment Share on other sites More sharing options...
Moderator drewpy Posted December 13, 2008 Moderator Share Posted December 13, 2008 did you turn it over with the starter motor? Link to comment Share on other sites More sharing options...
Moderator Airhead Posted December 13, 2008 Moderator Share Posted December 13, 2008 Sounds like thats what happened to me too (chain slipped), youre going to have to relieve the tensioner , undo the chain link and re-time as per workshop manual before re tensioning, like drewpy says...hopefully you were turning it over by hand or kickstart lever! Link to comment Share on other sites More sharing options...
chris c Posted December 14, 2008 Author Share Posted December 14, 2008 Sounds like thats what happened to me too (chain slipped), youre going to have to relieve the tensioner , undo the chain link and re-time as per workshop manual before re tensioning, like drewpy says...hopefully you were turning it over by hand or kickstart lever! I was turning it over by hand thats what ill do then thanks alot Link to comment Share on other sites More sharing options...
RoPoR Posted October 11, 2011 Share Posted October 11, 2011 I recently bought a 1980 XS850 and it appears that the previous owner had the same problem. He must have used the starter though... bent Exhaust valve in cylinder #2..... unfortunately. Link to comment Share on other sites More sharing options...
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