I have an atomik 125 proX its was running ok but was getting really hart to start and had small vibrations in the top end. the other day my girlfriend stacked and the pin inside the motor to engage the clutch came loose. so I had to take the clutch side crank case off to fix it. while the motor was out of the bike I decided to change piston and rings, as well as clean the head up a bit. Iv now put it all back together and re-set the timing. but now its running really rough with lots of vibration, any ideas what could be causing it could the timing 1 tooth off be the reason. or should I be playing around with the carby first, like I said before the bike run well, I had good spark and the carby was working well???