JanetsMechanic
XS650 New Member
83 with pamco electronic ignition system from Mikes (also their replacement stator alternator charging system).
Was working great for a couple of months after installing the new electronics. Bike then sat for a while and then fell over hard in the grass (on its right side) now it won't start and as soon as you release the clutch or hit the kill switch after turning it over it backfires so loud that it scares the crap out of you. I have checked compression - good. I can see spark when I pull the plugs and hold them against the block (I can't tell if it is "strong" or not - not enough experience). Seems to have fuel flow and I have replaced the gas in the tank a few times now. I have tried starter fluid and nothing seems to make it fire when I am cranking it over. Then BANG again when I stop. It seems like timing is the most likely but the new electronic timing system has very little adjustment and I have tried it "in the middle" as well as advanced and retarded all with the same result. I have tested the coil and wires for ohms and continuity according to the manufacturer specs and it seems to be in spec. I have tried and test a LOT more but absolutely no change in behavior.
I am desperate for suggestions.
Was working great for a couple of months after installing the new electronics. Bike then sat for a while and then fell over hard in the grass (on its right side) now it won't start and as soon as you release the clutch or hit the kill switch after turning it over it backfires so loud that it scares the crap out of you. I have checked compression - good. I can see spark when I pull the plugs and hold them against the block (I can't tell if it is "strong" or not - not enough experience). Seems to have fuel flow and I have replaced the gas in the tank a few times now. I have tried starter fluid and nothing seems to make it fire when I am cranking it over. Then BANG again when I stop. It seems like timing is the most likely but the new electronic timing system has very little adjustment and I have tried it "in the middle" as well as advanced and retarded all with the same result. I have tested the coil and wires for ohms and continuity according to the manufacturer specs and it seems to be in spec. I have tried and test a LOT more but absolutely no change in behavior.
I am desperate for suggestions.