Finalized carb job this afternoon.
Needles back to middle slot after testing higher needles, (1 vs 2 (bottom) slots lower).
Both caused too rich idle
Mikuni VM29 are a little bit different
Main jets caused rich all the way down in throttle lift
Idle runs rather smooth again..Let's see how engine will work on the road. Hopefully no pinging and full power without hesitation up to +200km/h according to the speedometer as back in the days.
Smaller pilots (17.5 from 20) due to larger mains (135 from 130) and retarded ignition since last time pinging.
End of 80's with K6 OEM carbs: pilots 40, needles 1 slot down from middle (raised needles), mains 147.5 (lots of tasty leaded gasoline
)
Needles are really easy to adjust on these Mikuni VM 29 carbs. Remove tank, open 4 top covers with 3 screws, remove all 5 hex screws 8mm socket keeping 4 throttle arms to throttle axis and the throttle linkage (pull, puch cabling move this).
Remove the outer end rubbers on 1 and 4 carbs, push the throttle axis out. Keep a thin screwdriver in outer hole so the axis can be back in the same way without turning it 180 degrees.
Now take out each throttle, untighten 2 small screws keeping the throttle in the linkage arm, throttle is free, take out small plug over needle, let the needle fall out and adjust the clip without dropping it.... then reverse back. I have done this 3 times now with carbs mounted on engine. Max 1 hour.
All rejetting done without removing the carbs and damage the carb boots. I have replaced the X-heads with allen headed screws from the very beginning 30 years ago. Rejetting with carbs on engine not possible with original X-heads.
I must have removed the float bowls fastened with 4x4 screws minimum 20 times the last 10 months. I hope the threads for pilot and needle jet especially will cope for some more exercises.