So, I just put a gx 160 head on my bike and ported it. Then I drilled out the jet bc it would only run on choke. I did it incrementally until it seemed to run good but it's just all out of whack now. It idles smooth and dies if I add throttle unless I hold the brakes and get it to build up rpm slowly. I can't figure this thing out. Does any one have advice?
Idles great, dies when i add throttle
- Thread starter Everett
- Start date
Mine was the opposite. It would run (with lots of popping) but wouldn't idle. Cleaning the idle jet vent fixed it right up.
Idle Jet Vent
Idle Jet Vent
Double check valve lash and maybe do a leak down test to make sure valves are sealing. You could have nicked the seat.Buy this and don’t worry about drilling jets. https://www.eccarburetors.com/adjustable-gas-gx200-main-jet
If you can spray starter fluid into it while you rev and it keeps going then your hi-speed circuit is probably the culprit. I have had some success pulling the adjustment screw out and using spray carb cleaner with the small tube attached. Put it in and spray. Also any of the small ports in the throat can benefit from this if you can reach them.
