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Honda CB750k2 main jets
Pauarc:
110 jets in Been for run for about 30 miles runs ok tick over a little rough air screws now 1 turn out. was 1 and half going to look at plugs tomorrow morning
K2-K6:
--- Quote from: Pauarc on August 06, 2023, 09:39:14 PM ---110 jets in Been for run for about 30 miles runs ok tick over a little rough air screws now 1 turn out. was 1 and half going to look at plugs tomorrow morning
--- End quote ---
Certainly interesting as the use of airscrew resetting when using the smaller mains shows that it's really asking to run with the needle lifted one notch (needle up, clip down one) to get it in the right place now.
This would bring the initial phase of needle taper and richer mixture down towards the idle circuit flow to stop it dropping into a bit of a lean flat spot about third throttle opening, then leave the idle back where it was to enhance that smoother running when they were set slightly further out.
Subtle difference, but places the elements more accurately.
Martin6:
1 turn out on the airscrew is around where the service manual suggests. I wondered if carbs on and off and jet changes, just affected the balance? Maybe re-balance the carbs, to see if that improves the idle?
Pauarc:
All plugs are now running a bit on rich side
Pauarc:
All air screws are working correctly all set to best tick over
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