Recommended jetting?

crackerjac · 07-31-2019, 12:57 PM

I picked up one of these PWK clones for my OHC 223cc Zongshen motor, basically a Honda CRF230F(223cc) clone.

Has anyone dealt with this carb and can recommend some jetting to start with for tuning?

The CRF230 guys say 120 main, 45 pilot but I can't figure out if that's Mikuni, stock carb, OKO, or True Keihin PWK jetting.

I tried 45 pilot and had to turn the air screw out 4+ turns out (very rich) but the bike loved it, but rich. I've been going down in size to currently a 38 which is around 2 turns out but the bike stumbles when I blip the throttle. I'm thinking a 40 might be the sweet spot. How far out on the air screw is acceptable? Needle is is in the 4th from the top, I'm going to put it back in the middle and continue tuning.

I'm at 761ft above sea level. All trail riding.

https://www.aliexpress.com/item/3284...27424c4dAc5IIl

07-31-2019, 12:57 PM	#1
crackerjac Join Date: Sep 2016 Posts: 103	Recommended jetting? I picked up one of these PWK clones for my OHC 223cc Zongshen motor, basically a Honda CRF230F(223cc) clone. Has anyone dealt with this carb and can recommend some jetting to start with for tuning? The CRF230 guys say 120 main, 45 pilot but I can't figure out if that's Mikuni, stock carb, OKO, or True Keihin PWK jetting. I tried 45 pilot and had to turn the air screw out 4+ turns out (very rich) but the bike loved it, but rich. I've been going down in size to currently a 38 which is around 2 turns out but the bike stumbles when I blip the throttle. I'm thinking a 40 might be the sweet spot. How far out on the air screw is acceptable? Needle is is in the 4th from the top, I'm going to put it back in the middle and continue tuning. I'm at 761ft above sea level. All trail riding. https://www.aliexpress.com/item/3284...27424c4dAc5IIl
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