50cc gy6 Valve adjustment. By gy6139qmb2013 (Read 2,480 times)

[gy6139qmb2013]

Well I have read many threads and seen a few videos. And I cant seem to decide on the gap? .003-.005 is what im reading. And is there any tips on things around my home to use that might be .003? instead of a actual gaping tool. for instance pop can tin can?

[rapidjim]

Save yourself some grief and go to your local hardware store and buy an feeler gauge set.

BTW I set all my 50cc machines to .004 inch both intake and exhaust.

Jim

[royldoc]

Why not use the proper tool for the job? They are not very expensive. Pop cans can vary in thickness any where from .003 - .0045. I set mine at .005.

Roy

[gy6139qmb2013]

Thanks, Well Im a bit tap out for american earth monies on this project. I actually bought this scoot for 40$ in about a 150 pieces..lol I did do a bit of googleing on pop can thickness and they do range in thickness. Im going to choose a bargs root beer can apx .0038 and see if my luck with the hard starting will vanquish. Thanks and ill deff post my happenings.

[gy6139qmb2013]

Ok, So I have adjusted the valves. The intake valve was really tight like a whole turn or more. So I have set it using a Arizona tin can. The exhaust seemed to be ok using my tin gauge. With this step being done I tried starting it with no luck. So I have popped out the spark plug and its black with wet gunk. Keep in mind i was running it with the valve open? and had adjusted the fuel/air screw way out...now realizing it was filthy rich...It was brand new less than 20mi ago.

[scooterbob]

If it was in 150 pieces are you sure you assemble the parts correctly. Timing mark lined up is the main concern. Do you have spark at the plug and of course fuel.

[sumdawgtwigg]

Def invest in some feelers when and if possible. I tried using a soda can but i kept wondering if it was right. So, I went and bought some feelers and boy was it way out.

[gy6139qmb2013]

Yes, only about 5 american earth monies. made a day and night difference in power and compression..

[gy6139qmb2013]

Sept 12, 2013 20:20:31 GMT -6 scooterbob said:

If it was in 150 pieces are you sure you assemble the parts correctly. Timing mark lined up is the main concern. Do you have spark at the plug and of course fuel.

Lol. yea Im a rookie... So AS to address this I actually found that the carb I had decided to install on this project was bigger than another one I had. The outside or exterior of the carb was somewhat identical. Most parts being swappable between the two. Except for the diaphragm, spring, and air fuel ratio screw. After messing with the big one with the vacuum diaphragm open and the scoot started i was pulling it up and down and twisting the throttle. and got a desired acceleration and starting. (I forgot to mention it was bogging at wot.) So installing the smaller carb adjusting it adjusting the valves new plug premium gas switched back to the regular cdi and new ground wires. She rides quite decently for a 50cc. So thanks this was much help.