- Joined
- Mar 1, 2007
- Messages
- 146
I fixed the popping on deceleration problem with my commando by tightening up and sealing carbs to manifold but created another . My 74 850 Commando has had the intake polished and possibly widened by the previous owner?? When I pulled my carbs off last week to seal the mating surfaces better I decided to raise my two needles by one notch. They were both on the bottom notch and I raised them to the middle. Now the engine is behaving badly upon moderate acceleration in 2nd and 3rd gear. When I moderately accelerate in 2nd and 3rd it stalls or stutters for a split second until rpms rise and the throttle is opened more to mid or full throttle. I pulled both spark plugs and inspected them. The insulators look to be a nice whiteish tan color but I did notice a black powder soot on the electrodes and outer rim to the threads that is exposed . It was not having this stalling issue before I changed the needle settings. Should I now move the needles back to the original positions(CLIP AT THE NEEDLES TOP NOTCH). I thought that since the intake ports were polished and possibly widened it could handle a little more fuel to air ratio?? was I wrong?? Do you think I may have created some other reason for the stalling besides moving the needle position??? Thanks for any advise--Mark Cigainero