RB Carb and jetting

Questions and Answers about the best carb and Head mods available for the KDX.
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ebeck
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RB Carb and jetting

Post by ebeck »

With the RB carb and PC pipe, would one expect the the bike to be leaner than with stock carb and stock pipe assuming jets stayed the same??
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Indawoods
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Post by Indawoods »

Usually with an RB carb mod, you will need to go 2-3 jet sizes smaller. That is my experience anyway.
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Jeb
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Post by Jeb »

Jet sizes went UP with my 220. Difference between mine and Inda's is the 220 gets a bigger change with the carb bore.

Ron provided jetting for my 220 that worked well for the conditions I stated (cool weather in the spring). The 150 was fine then but I switched to a 148 as the summer came along, chopped plug looked really good then.

Stock main on the 220 is a 145 I believe, folks who change the jetting for the better end up with 138-142.
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Indawoods
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Post by Indawoods »

148/42 is what I think I am running with the RB treatment and she runs CRISP!.... with the stock carb on my 200 was jetted at 152/48 I think when it was jetted lean.
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ebeck
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Post by ebeck »

KDX200. I was using 152/40 with stock pipe, and it was rich. I'll drop to 38/150 with PC pipe and RB mods. Probably closer with that. Right?
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Indawoods
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Post by Indawoods »

Yes... watch that pilot though....
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****'95 KDX 200/****

"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "
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Jeb
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Post by Jeb »

>|<>QBB<
ebeck wrote:KDX200. I was using 152/40 with stock pipe, and it was rich. I'll drop to 38/150 with PC pipe and RB mods. Probably closer with that. Right?
Oops, I was thinkin' you had the 220 . . . :oops:
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