help wanted
finally got my 400 running after engine rebuild
but wont idle and running at 3000 4000 rpm
checked all seals in carbs all ok
can someone tell me what set up i need
any help would be great
thanks richard

i would check your mixture, there super sensitive and possibly do a carb balance as that can effect the low idle making it feel really really lumpy and horrible.

On my gsxr400 i know my 4th cylinder wouldnt actually start firing till over 4k revs i never managed to sort the problem cause it dropped a valve but i was pretty sure it was a balance issue or a air leak