Exhaust Cap needed?

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Jim860

New Member
Oct 2, 2013
2
0
0
Connecticut
im running a stock exhaust on my 66cc bike engine and looking for more power like any one and i heard that removing the cap with add power. ia this bad for the engine and does it actually add any power. also any cheap mods that you know of that will add power. usflg
 
maniac57

maniac57

Old, Fat, and still faster than you
Oct 8, 2011
4,484
22
0
memphis Tn
Removing the cap sometimes improves power, but at the cost of being annoyingly loud and obnoxious. Get a tuned pipe for the best bang for the buck in power adding mods.
Bigger carbs are useless without the mods required to take advantage.
A good tuned pipe is the single best bolt on I know of.
Might try a smaller rear sprocket for lower rpm at cruising speed and better top end.
 
2door

2door

Moderator
Staff member
Sep 15, 2008
16,302
175
63
Littleton, Colorado
Do the hobby and your neighbors a big favor and keep the muffler as is. Maniac's suggestion is the way to go. An expansion chamber exhaust will add some power and not make enemies. The small amount of power increase you might see by uncorking the exhaust isn't worth the negative attention.

Tom
 
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