Thread: sbp expansion
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Old 05-19-2010, 08:43 AM
kyl 46&2 kyl 46&2 is offline
Motorized Bicycle Senior Member
Join Date: Apr 2010
Location: MN
Posts: 77
Default sbp expansion

i just put on a sbp expansion chamber yesterday, although it fits its a tight fit and i'd like it a little more secure. i messed around with adjusting it for 2 hours trying to get the best fit but its not quite where i would like it. i want to know if its ok to take off about an inch on the J pipe and how it will potentially effect performance on a 80cc. this is all on a 29'' mountain bike with a few other mods.
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