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Mikuni jetting for XR430

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Hey,

Anyone got a mikuni pumper working on a 430? I can't seem to get it right with the jets I've got..

It's running a JE 430 piston at 10.5:1 comp, stock exhaust with no baffle, hiflo air filter with the snorkel uncorked. Not that it makes a difference but there's a s1 hotcam in there too.

The carb's set up now as I got it from the shop (will have to check tomorrow to tell what jets they are), tuned for stock combustion at 0-1000ft. Ran perfect as a 400, plug's black as sin as a 430!

W.

2001 XR400

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I'd say definitely find out what jetting is in it. I'd start with a 130 main and 15 pilot for your setup. The fuel screw will need retuning for the 430. The vacuum signal to the carb jetting and air jet will be a little different from the stock bore.

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