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View Full Version : Whats the diff between 38mm and 39mm pwk??


MX450
10-19-2006, 07:43 PM
NOT an A/S, but just a 38mm and 39mm pwk, what is the difference between the two??

The keihin website shows specs, the measurements are the same, the only difference it shows is the jets, is this the only difference?

I currenty have a 38mm pwk, and i need a new carb, should i go with a 39mm?
Aceman
10-19-2006, 08:16 PM
The difference is 1mm.

Look at the measurements on Keihins site again. They show outside, not inside measurements.
wilkin250r
10-19-2006, 11:57 PM
The inside of the carburetor at the slide is the "size" of the carb. The outside numbers can be identical.

Me, personally, I feel a 38 is pretty big on a 265, I don't think I would suggest bigger unless you're a big dune rider or something that requires lots of top-end and have no use for low-end at all.