ATC 110 tuning question

[coolatc]

I just rebuilt the top end on my 83 110. I put new valve seals, valves, piston, rings, wrist pin, clips etc. I used a new gasket kit and everything went together perfectly. In fact when I gased it up, it started on the 8th pull. I then set the timing with a timing light and adjusted the valves. There are no leaks and it runs pretty good. It starts 1st pull with my thumb slightly on the throttle.

I do see some smoke when it cranks up and while riding it? It appears to be running rich. This may be causing the slight hesitation when I romp the throttle. If I gradually give it gas it runs great, when the rpms are up it runs great. Do I have a carb out of adjustment? Should I lower the needle valve? Not sure what the fuel/air screw does. I've tried it almost all the way in and all the way out with no noticable difference in performance.

Anyone have any ideas? Thanks in advance.

[MTS]

sounds like you are runnig a little rich, try giving you air screw a half turn-1 turn out, it could also be left over oil in the pipe from befor the rebuild, too, but i think its rich becuse you have to tap the throttel when you start it.

[rally4x4racer]

i see this was about a year ago - did you ever get it figured out? I have a similar prob - just tore completely down and rebuilt.. and havent had a chance to barely brake it in - I just set the timing by hand and would be interested in the procedure for using the timing light -

mine is probably running lean... I put the K&N filter on it and dug up a larger
(#92) main jet but I still think it is running to lean (coughs out the intake a bit)


UPDATE: hmmm - its wetting the plug with fuel.. which means rich - man im confused

thanks