Georgieboy69 Posted April 5, 2020 Report Share Posted April 5, 2020 Has anyone had issues with the sudco keihin 38mm pwk. I installed mine fired right up but when brought off idle it would rev hang and never come down I checked for air leaks there were none and the throttle cable is free and the slide bottoms out Quote Link to comment Share on other sites More sharing options...
Stingray Posted April 5, 2020 Report Share Posted April 5, 2020 Are they jetted correctly? Quote Link to comment Share on other sites More sharing options...
Stingray Posted April 5, 2020 Report Share Posted April 5, 2020 What size are the jets in the new carbs and what size in the old carbs. If you run the chokes does it help? Quote Link to comment Share on other sites More sharing options...
Georgieboy69 Posted April 5, 2020 Author Report Share Posted April 5, 2020 3 minutes ago, Stingray said: What size are the jets in the new carbs and what size in the old carbs. If you run the chokes does it help? 220 main and I think 50 pilot I never tried with the choke I used the jets from my 36 mm pwk but pulled the needle up one notch it’s a single carb set up think I would need to up size my main jet Quote Link to comment Share on other sites More sharing options...
Stingray Posted April 6, 2020 Report Share Posted April 6, 2020 That is a 8 percent gain in air flow so it shouldn't be that crazy I would check my float and make sure it is full of fuel. If it is slow filling it can lean out and it will rev like that pull the bowel and check flow by hooking ip fuel and move the float check the flow if that is good pull the main jet out re assemble and start. If it falls on its face when you give it gas then the jet is way off if it revs the tube that holds the jet is blocked 1 Quote Link to comment Share on other sites More sharing options...
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