All back together and ready for MOT now BUT..............really poor idling problem
Symptoms --- starts OK even from cold but sounds like a tractor
moving choke doesnt seem to make a whole lot of change. Also I noticed that adjusting the pilot air screws doesnt seem to induce any change in engine note but to be fair this is the first time I have worked on a four and I was only moving the screw about 1/4 turn either way. SO I am not sure really what I should be listening for here.
Once warm she sounds better but still a bit lumpy, blipping throttle off idle to say 3k RPM sounds really good
What I have done ........
A) Carbs all cleaned out including all jets removed and cleaned and all appear clear. All jets are original Keihin and fitted with new O rings.
B) Carbs have been balanced
C) New points and condensors fitted and timing strobe checked
D) New intake boots and no air leaks detected
E) All pilot air screws set unitially at 1 turn out
Overall it sounds to me like overfuelling at idle the only thing I have NOT done is removed the pilot air screws and cleand all their orifices
My plan as I really dont want to take the carbs off agaiin
1) Recheck timing with strobe
2) Recheck float heights and fuel levels using "manometer" tubes
3) Remove all pilot jets reclean and squirt a ton of carb cleaner in the pilot air screw holes
Anything else anyone can suggest ?