I had my 650 upside down and ever since it seems as if the timing is off......backfires a little and runs rough at fast idle and when reved up. any suggestions would be appreciated, also hard starting thanks

 

How long was it upside down and was it still running when it was rubber side up?

 

It was rubber side up for about 2 mins and I dont think it ran at all after it tumbled down the hill...........

 

Sounds more like a problem with the carb rather than timing. There not really anyway for being upside down to effect timing.

 

Check for oil in air box , you may have gotten oil into the carburator causing the rough running, how long has it been doing this after being upside down ? Anyway check for oil in air filter box , this is what i would check first , you may need to drain the carburator bowl and get any eccess oil in the air filter and replace your spark plug. I would add some sea foam in your gas tank it is good for cleaning your fuel and combustion chamber. You can get the sea foam from most auto parts store's O'Really's , auto zone , advance auto part's for about $5 to $9.00 this is some good stuff for all type's of engine, all engine's from the smallest 2 stroke's to the biggest 4 stroke engine's. Keep us posted and let us know how it goes ! .............williebee