MOPED ARMY

just chop up your exhaust

back pressure is crucial.

Does anybody know how much back pressure is optimal, and what the signs are for too much or too little?

I used to have a PA50, and I took the exhaust off it like you have, and yes, it was faster, but it was still just as fast after I modified the exhaust and put it back on. Just cut the header pipe right before it goes into the muffler, and get a muffler shop to weld on a steel pipe you can find at a hardware store. My ped ran like that for about a year before it got stolen.

hmmm profile says .. INWOOD.. thats pretty close..

I am a half hour from berkeley springs. Thank you all for your valuable input. I did not ride it long without the exhaust because of the horrendously loud noise and because I had a feeling it was not good for the bike. The damn thing went so fast I thought I was gonna throw pieces of piston and connecting rod out of the jug. I want to get another muffler so I can butcher it and make my own exhaust. My bike is just too nice to butcher. Anyone who wants to start a Moped army branch email me.

And on top of everything else, you will REALLY piss the neighbors off.

Yo josh I sent you a email.

expansion chamber retard

the exhaust threads on my moby finally gave out the morning of the long ride at bomb prom this year so I was like fuck it lets ride till i seize this engine. blasted 35 miles without a hickup- the exhaust was almost completely out of the cylinder the whole ride. changed cylinders when i got home for sure- not a good idea in the long run but it can be done for a little while. loud as fuck though.