Athena 70cc kit and PHGB 19.5 idling issues

Mason Campbell /

Hey guys, so I’ve got a problem. Athena 70cc kit with PHGB 19.5 carb. And a stock pipe. (Owner likes the stock pipe)...

Main jet is at 82 idle and choke jet are 55 and 55. Mixture screw is about a half turn out and idle screw about a half turn from full tight.

Bike runs at 1/3 throttle when the main jet starts kicking in. But in the low RPM range she literally will not idle no matter what we do. We’ve adjusted the needle setting from full rich to full lean. I have new idling screws of a smaller size coming in tomorrow. We ran a spray test and there are no evident leaks. We cannot figure this out and it’s the most frustrating thing I’ve dealt with in quite some time.

I’d appreciate anything you have to input.

Re: Athena 70cc kit and PHGB 19.5 idling issues

Dirty30 Dillon /

Slide cutaway heavily affects idle tip-in. If it won't idle with the slide closed, than it's a jetting/airleak issue..

Re: Athena 70cc kit and PHGB 19.5 idling issues

Mason Campbell /

> Dirty30 Dillon Wrote:

> -------------------------------------------------------

> Slide cutaway heavily affects idle tip-in. If it won't idle with the

> slide closed, than it's a jetting/airleak issue..

Ok cool. Yea we ran a spray test and can’t find any leaks. Double checked every gasket and it’s all snug. Cleaned every surface before I put the kit too. I have smaller jets coming in hopefully tomorrow

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