50mm kit upgrade. hard cold start

[pdjames14]

Having issues starting scooter when cold, seems to be lack of fuel maybe?? I didnt upjet the carb and was wondering what recommendations yall could provide as far as idle and mainjets for the build.

Stock GY6 49cc engine, modded with 50mm kit including head. Stock cam. Upgraded to orange CDI/Coil. Everything else is stock.

Just seems to be a bitch to start when cold, runs fine once you do get it started. Warm it will start right up with barely a starter bump.

Any feedback appreciated!! Thanks!!

Valves are @ .003 intake/exhaust also.

[wamgaming]

Im having the same troubles with mine currently. I think that it might have something to do with the upgraded CDI advancing the timing too much. I have watched YouTube videos on the preformance CDI's making it more difficult to start. Try to replace it with the stock CDI and see if that fixes any of your issues. If that doesnt work I would recommend a 35 pilot jet. Also ensure that your spark plug is not fouled.