I have a KEIHIN PWK 72RA2 KJ carb on my new to me 92 LT 250r. Cant find any info on what size it is, can anyone help me with this please. Also the motor is stock with a FMF pipe and a 22MM cool head and a clamp on filter no air box. any idea where I should start on jetting

Thanks for any help

Yes I did. No luck not really any info about it. Thought their might be someone on here that has info. Even tried to call Keihin but never could connect

On my 38mm PWK Air Stryker I run a 45 Pilot and 170 main...Not sure on the 39mm but on the 38,s around a 50+or - pilot  and 175-180 and work down is a good starting point.Not sure how much difference a 39mm is or if the Air Strykers jetting is much different.Maybe someone else will chime in.

I had a 39 PWk 4-5 years ago and I ran a 175 or 180 main in it.

Can't remember the exact pilot but 45/ 42.5 does ring a bell