MOPED ARMY

Sounds like an air leak.

Craig go get a can of carb cleaner and with the red hose attached to the nozzle, start spraying around the head, base gasket, and then the base of the intake, then where the carb meets the intake, then the top of the carb, then the float bowl(least likely). I think you will find your airleak. It's pretty easy. After you find it, fix it. RTV is your friend, although Glenn will tell you otherwise.

Air leak... My GF's bike did that! Was missing a intake/cylinder gasket... It is like a surging, and holding the brake would kill it.

PS.

Silverfox, definitely not the throttle cable, checked that first off...

Should make the rpms decrease suddenly maybe even make the engine die.

ok, so i sprayed everything down with carb cleaner and couldn't find anything super apparent. I decided to take the intake off and put it back on using liquid gasket as well as the actual gasket that came with the kit....

Now the bike won't start. Is it possible that I sealed the air leak and now that it is not there it is getting to much gas and won't start? Like is the main jet to big now, would the main jet even effect the starting of the bike?

rubber mount with the two hose ties. needle is set at second from bottom position. I'm going to go tighten the air mixture screw in and try and start it again.

you're all a bunch of goddamned geniuses I tell you. The bike starts and is idling waaaaaay better now. I think it was an air leak at the intake as you suspected Frick. thanks for the input everyone, you made my day! Time to go fine tune her to get a smoother idle...

Yeah!

wait i thought backing the air mixture screw out was leaning, and in was richening (not the idle screw)

there seems to be great to debate about this...

I posted another thread a while back to get that solved and got about 8 different answers.

Um try Reading the manual. I'm A firm believer in not posting unless I'm a hundred percent sure about something. That last post craig made i said the same thing and people dissagreed again RTFM or better yet experament and see for yourself instead of passing missinformation along to people.

Kelly, this is what I've gathered from everything I've read about this. On carbs such as the PHBG, the mixture screw is on the intake manifold side of the carb. the mixture screw is metering the amount of fuel coming out of the bowl. SOme carbs have the screw on the airbox side of the carb. The mixture screw for those types of carburators control how much air is in the mix.

lean it in. Thats what I have always been told. Shaw also told me to screw it all the way in, then back it out a quarter to half turn and leave it.

Last year at k-zoo I spent like an hour trying to figure out why my bike wouldn't start, shaw came over, within 30 seconds tightened down a mixture screw that had worked its way lose and it started right up. I don't know how he does it.

steve, I am trying to become a local moped genius! I like learning things, even if it means endless heart break.