ok, where to begin. The reason I'm posting is to find out roughly what I should be running for jets, so I can get some to start tuning.
The details:
First, the bike is an 03 speedmaster 790. Most of the time the bike is at around 4,500 ft elevation. I have an aftermarket set of shorty (12") exhaust w/baffles. For now, the air box is in the bike but I plan on removing it soon (air filters on their way), so lets just say it's gone and K&N pods are installed. The AI has been removed. Near future plans include an exhaust heat wrap. The dealer, who was also supposed to fix an oil leak and didn't, claimed to have jetted the bike for my elevation.
The symptoms:
The bike pops and backfires (a lot) on deceleration, with the throttle closed. It does not backfire any other time. When I replaced the plugs two nights ago they looked to be running too lean. Occasionally, when cruising, the engine will bog (more like choke itself if I'm right about it running lean) for a second when I twist the throttle open to accelerate. I'm not sure but I think it may also be idling high when warm (nothing extreme, just slightly 1,500 rpm or so). One other thing that scares me is that the dealer claimed the bike was running so rich, according to whatever machine the hooked up to it, that it should not have been running. The engine also seems to have a slight miss (barely noticeable) when cruising around 4,500 rpm.
Please help me make sense of all of this.
