I just completed some work on my new 2004 TBA that included cleaning the carbs and changing the main from a 140 to a 148 (based on the jet calculator). The idle jet was left at a 45 and I balanced the carbs, (originally off by about -10 now at +/- 1 of each other). Following the directions for the mixture in the Haynes manual I was unable to detect any change to the RPM during adjustment. So, I set them back at the as found 1.75 turns out and tested the performance. The change to the mains was great, but now I have lots of decel popping. I would have guessed the original setting was too lean based on the very blue pipes and the very hot engine, but the sudden new popping makes me question that. The vacuum caps are all new and the carb to cylinder rubbers are in great shape.
Checking this site it would seem what I need to do is pull the plug wire and connect a spare spark plug, disabling one cylinder and adjusting the other only, each in turn.
Am I correct that this will then allow the subtle changes to the mixture to be detectable to the factory tach and is the best way short of some type of exhaust gas analyzer?
K&N Pods, AI removed, 2 baffles/side removed, TPS connected at factory settings,
Thanks for any feedback
Rob
