All 2st About the Mikuni/Keihin swap:

I just picked up an '02 CR125 with a Ferracchi 135 kit and would like some advice. I had the same bike a few years back and remember there being a needle that really helped sort out the jetting issues. I was poking around this site looking to see if it was still being used and came across this thread. Would a PWK work as well on the 2002? I was also considering the RB designs divider plate. Whats the best option?
I also see that JD sells the PWK with their jet kit already installed, is this the best route to go if I decide to do the swap?
Thanks

Is it more of a sputter or a gurgle , hummm.

You can also get the kit from Kelly/Mike @ Motosportz. Actually, the PWK fits better in replacing the old style TMX flatslide. Yes, the RB mods are worth the money. MattR has a jetting post on an 08 Cr125 with the PWK, that'll get you started. You might want to look at Vinduro's post as well and when you go with the bigger bore kits, looks like he is getting good results with a 36 Keihin.

Hi, will the green pwk 38 as (short version) from 04 ktm sx 250 fit the 2006 husqvarna wr 250 or should it be the red one pwk 38 as (long style with plastic cap)? I heard that the short one will not fit the wr 250, because it is not wide enought (from intake manifold to filter). Can you get me some pictures of your pwk installed on wr 250/300. Thanks.