Re: been working on this thing for 3 weeks bout to give up chain and sprocket issue
You may want to check whole clutch cable set-up. Without seeing it, it is hard to tell what is wrong. So I will go over the whole thing. You had to take the cluch lever and cover off to put the chain on, then repace cover there is a ballbearing in the in the hole where the push pin goes, check to be sure it is there. The levers's flat side will be toward the push pin when you put the cover back on. The lever will face the rear wheel. Install the clutch cable coming from the clutch handle bar lever that is on the left hand grip side. The larger spring is a heat shield and goes over the cable first to keep it off the motor. Feed the cable thru the cable stop that is located on the right top of motor. The thinner spring now goes on next between the cable stop and the clutch lever on the motor. feed cabel thru the motors clutch lever and pull all the slack out so cable is tight. Secure cable while pulling usin the small collar, usin a screw driver. Now check and see that the clutch lever moves in a good ways when you pull the handle bar lever. sometimes it takes more adjusting. I hope this has helped.