2000 Honda 400ex jetting help

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Mar 25, 2012 | 10:11 AM

#11

Doctorturbo

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Quote:

Originally Posted by hondarider42

I was also just reading that the stock main jet is a Keihin 148, and Dynojet uses a different sizing chart for their main jets. I believe it says that the stock 148 is equivalent to the 134 Dynojet. So that means that the 150 main I have in now would be somewhere around the 165 main jet for Keihin?

Here is a chart that will help you cross over on the jet sizes. Man I hate when different manufactures use a different numbering system.

Carb Jet Size Cross Reference:Keihin/DynoJet/Mikuni - Honda ATV Forum

Remember this will only get you in the ball park.

It's just really hard to diagnose over the net. It's hard enough to do it in person. Your going to have to go either a little leaner or richer and see if it makes the bog worse or better and go from there.