Posted July 14, 2007 - 07:01 PM
Well then start with the real basics and work your way through. Make sure your CDI is plugged in all the way (since you were messing with it maybe it isn't plugged in right). Make sure your spark plug cap is pushed down all the way (Yamaha's have a nasty habbit of working their way up and losing spark). Try changing the spark plug. It doesn't sound like your timing is off, but you can check to be safe. Then you can start getting more technical. Check your clutch to see if it is slipping. This happened on my 250F when I did a bunch of mods like that the bike stopped pulling and it turned out that the clutch springs were not strong enough and the clutch was slipping (I wasn't getting extra enplay though which through me off). Then you could try a compression check.