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Jetting a 440
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Posted by: hondaman440ex

I was wondering if anyone has a 400ex that they have turned in to a 440ex. What is the jets that you use? I have a 12.5:1 compression, Hot Cam Stage 2, Pro-Circuit T-4, K&N Air Filter, and will be running 110 (107VP) octane. I don't know how to re-jet things so if anyone could help me out that would be awesome! Thanks

Oh yeah, I forgot to mention that I am getting the valves done and Having it port and polished. I don't know if that makes a difference or not? Elevation is 850ft above sea level!

Posted by: Wheelie

With or without airbox lid? Stock carb?

Posted by: hondaman440ex

Yes the carb is stock and the air box is there with a outwear cover on it without the stock lid.

Posted by: Wheelie

Here's a good starting point:

42 pilot, 178 main, lower the clip on the needle one notch.