How do you tell what size PWK carb you have?

[jimanold22]

I bought a 250 with a aftermarket Keihin PWK carb.How can I tell what size it is?Ive looked for stampings briefly,but didn't see anything that would tell me what size it is.Any help would be great.Thx

[x.system]

Where the bowl meets the base of the carb there will be some letters and numbers.

[86 Quad R]

with the number of carbs that are floating around out there and with sooo many people modding them. the only sure fire way to know for sure is to measure the bore at the slide area.

[jimanold22]

So I need to measure the bore with a micrometer?

[86 Quad R]

if ya have a Telescoping Gage Set that would be ideal but, otherwise i'd suggest removing the slide and measuring straight up from the floor of the bore with a machinist rule and converting to metric.

[jimanold22]

Ok,Measured it today,Came out to 35.71 mm's.So i'm guessing it's a 36mm?Where can i get a needle and seat for this carb?

[Aceman]

www.sudco.com

[jimanold22]

Thx ace! Ok guys I have been on a few carb site's.My # don't match any of the carbs listed on the site.I must have a dinosaur!My #'s are G095 A1F6.What do you guys think?