MOPED ARMY

You did something wrong, period. You should be getting 40+ with that setup tuned mildly ok.

50cc head could have a smaller combustion chamber volume than a 70cc high comp. You have more compression.

If you think you did everything right, including jetting and timing, make sure it's not something dumb like your wheels are locking/rubbing on something. Good luck finding the problem.

yeah something is wrong, i get good compression and 40+ with a 14 bing and estoril and that kit with the 70cc hi-comp head, thin base n no head gasket. it's on a za50 stock gearing. how much gasket u got on there?

My gearing is stock. 16 x 45.

I dont have a compression gauge.

Plug pic is attatched. It looks a little darker in person.

Anyone in chicago want to make a few bucks this weekend that knows their shit and help me fix this?

are you sure your timing was set properly?? cus that would probably do it...im running almost the same setup with a 12 bing and a 50 hi comp and im hitting 45 or w/e...but my point gap closed on me today and it rode like shit was barely hitting 35....opened up the points and zomgg...thats all it took...so recheck your points..

case matching, even done right, with an air die grinder, can be a half-hour job. not a winter project.

I'm actually running non-matched as of a couple weeks ago.

I found out my crank/bearings were wandering, and I wanted to go on a ride the next day. I quickly swapped out for another e50 I had lying around. I thought about matching it, but

a) I was lazy and didn't want to tear it apart

b) I don't keep silly putty around

c) I figured if I was trying to ride the next day, tearing apart a case would leave alot more room for error/not riding.

Still hit 45+ with an estoril, metrakit and del, but It didn't wind out to about 50 like it did before. Really annoying because I had been running that setup for so long and I felt like I hit a brick wall without it.

once you're used to it, 50+ = Weeeee! 45= meh

really think you need a smaller jet

Besides rechecking your point gap and timing, you are most likely running too rich. If you still have the stock airfilter take it of. If it runs better without it, you are too rich on your jetting,means install a smaller jet.

If it runs worse you are too lean, install a bigger jet.

I run a 70cc piston ported Athena on my Maxi and hit 40+ no problem. 15mm aftermarket Bing with a 72 jet.

Bonne chance

dude , its running rich at wide open and starving for fuel at the stop lights.

raise your needle or wait till you can feed it properly with a real carb.

a 12mm carb wasnt designed to feed that kit. It was specifically designed to strangle a 2hp bike into being a 1.5 or a 1hp.

give it a rest till you get a real carb and intake your gonna soft sieze it.

It's too rich, your plug looks way too dark. Downjet a couple sizes and I bet it stops dying at stop signs. It's too rich. As you break in, you aren't even going to be able to start it anymore and you'll get stuck peddling home. It's too rich. Oh yeah, you'll go way faster too. hey, did I mention it's too rich, yet?