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jet drill bit size? set drill bit size

#1 User is offline   itsjustagreat1

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Posted 16 October 2004 - 09:45 PM

Ok, I put on my CPI's today, and am jetting my bike. I am jetted up to 470 mains and am still a little lean. (Bike is ported with stock carbs) I don't have access to any bigger jets right now. My question is what size drill bits do I need to use for the following jet sizes? 460, 480, 490, 500, 510 mikuni hex jets? Thanks

#2 User is offline   DIRTBIKEZ

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Posted 16 October 2004 - 10:19 PM

It may be time to start looking into larger carbs my friend. ;)
2002 Yamaha Banshee
FMF SSTs, YFZ450 shocks, ProFlow w/foam, cut lid w/o snorkle, Boon tuned flywheel and head, Vito's TORS Eliminator kit, aluminum impeller, MrMatt's -2" swingarm

#3 User is offline   racer

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Posted 17 October 2004 - 01:43 AM

thats a good question. so if someone were to have a chart that depicts jet sizes in relation to numbered bit sizes, that would rule.

This post has been edited by therail: 17 October 2004 - 01:43 AM

This whole thing is painted with several even coats of high gloss stupid.

#4 User is offline   FIRST BANSHEE

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Posted 17 October 2004 - 06:44 AM

CPI's and a ported engine, your stock carbs are holding you back, even jetted right it's not going to let the engine rev out. you could get the bit that fits the 470 jet and buy the next few bit sizes.

#5 User is offline   roosthrower

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Posted 17 October 2004 - 09:50 AM

I believe the biggest mikuni hex jet available is a 500. I'd say look for some carbs. I picked up a set of 34mm mikuni vm's off ebay for $60. The best thing about them is that I can use the same mains from the stock carbs with the new 34's.
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