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honda tb 88cc w/race head kit, what main jet?

4570 Views 9 Replies 5 Participants Last post by  dirtbkr188
Hi, I'm new to this forum and pit bikes. This site is awesome and what i've been looking for to get advice. I just installed a Honda TB 88cc big bire kit with cam, race head, 20mm carb, air filter and a fmf power core 4 exhaust. What size main jet should I run? I haven't even broke in the bike yet because I didn't know what size to use. also any break-in tips? Thanks guys! -Evan
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The stock jets in the TB 20mm carb are an #89 main and a #35 pilot.
Actually, the TB main jet kit does not list a #91, but it does have a #90 and a #92, among the others included in the kit. Click HERE
.003" - intake

.004" - exhaust
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