Best carb for 95/97 Cr250 project?

[uneasy_rider]

I am looking for a good carb for my project CR250 which is a 95 gearbox with a 97 cylinder, FMF gold series pipe and silencer. I have no carb yet, so it is not a jetting issue, just want to get some input before I sink some money in it.

[plynn41]

Keihin 39mm PWK

[Redlined]

Keihin 36mm or 38mm PWK; the 36mm will add bottom end response, the 38mm will breath better on top, don't fall for the bigger is better trap.

[uneasy_rider]

Does the PWK have the power jet circuit? If so, how or can you defeat it?

[plynn41]

No the PWK does not have the power jet. If you did have a power jet carb Keihin PJ, just unplug the carb from the wiring harness. The bike will experience a slightly richer mixture at the top end.

[uneasy_rider]

Thanks, are all of the PWK's the same? For example, one off of a RM250 will fit a CR250 intake boot/airbox?

[plynn41]

No, they come in different sizes that will require different carburetor boots. My kid's YZ85 has a PWK for example. I'd bet that anything off of a 250 will work though.