ATVConnection.com ATV Enthusiast Community - NEED HELP: What's the stock jetting for the 400EX?

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wcy2k400ex

Apr 27, 2000 10:44 PM

Anyone that knows for sure what the stock jetting for the 2000 400EX is, please reply. I need to know it. Thanks a lot in advance.

Dill	Apr 27, 2000 11:51 PM

I know the main is a 148...I'm curious about pilot jet size tho..

NVR2L8

Apr 28, 2000 01:17 AM

My pilot jet was a 38, and the main was a 148. I changed the pilot to a 40...much better cold starting and idling!

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