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Old 11-07-2013, 10:14 PM
BonusParts BonusParts is offline
Motorized Bicycle Elite Member
Join Date: Nov 2012
Location: SE-PA
Posts: 168
Default Re: what did you do to your motorized bicycle today?

Originally Posted by Danschutz View Post
I just posted that my sbp exhaust gave me incredible low to mid torque, a real hill puller but I'm sure I lost some high end. I'm not certain high much I lost because I swapped out sprockets also.

The low end is so strong I can pull a pretty big hill by my house from a dead stop no peddling and about a ten yard head start with no issues.

Does your motor have any other mods?

My motor has cleaned intake an exhaust ports, they have been smoothed slightly enlarged, the combustion chamber is polished, head is milled down. .016 copper gaskets, NT speed carb,with air filter & .66 jet from SBP. ngk iridium plug, jag cdi and coil, accel 8mm plug wire.

Its on a 36t sprocket.

Oddly enough i've noticed that at low rpm it runs great on low throttle input, but at wot it just bogs. not four stroke, bog. Not sure what to make of it. I shortened the header, but it was rainy all day so no test yet.

I've maxed at 43.62mph on the 36t via GPS (MyTracks)

Recently (right before i hit the deer) it was about 39mph
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