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Crazy jetting problem!!!

1015 Views 6 Replies 5 Participants Last post by  sumo bill
This is driving me crazy!!!!!!!!!!!!!

As some of you know, I installed a 30mm Kehin PD Carb on my CRF230 replacing the stock 26mm PD

It has a 40 pilot, 1.75 turns out on the fuel screw, 37D slide, 85A needle, and a 158 main.

Engine has a 11:1 piston, BBR Cam, BBR Pipe and some mild head porting.

When running the bike at WOT, and then rolling off the throttle (not chopping the throttle) the engine momentarily cuts out, and then recovers.

Not a huge issue when in the dirt, but when mid corner racing SM, it could really ruin my day....can you say highside!!!!!!!!!!!!!!!!
1 - 1 of 7 Posts
Sounds like you've a rich misfire. You're goal is to determine if you're still on the main jet when this happens or on the pilot get. Either way it sounds like you need to fiddle with jet sizes and/or dropping the needle.
1 - 1 of 7 Posts
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