Has anyone here have problems with running on only one cylinder? Mine keeps doing this to me. I start it cold, choke up, and it catches but then runs only on one cylinder (left side) until i blast the throttle long enough to open up the other. Then when I take it down off choke, it sometimes goes back to idling on one cylinder after running choked on two. Also, the right side spark plug kept fouling more than the left (did a swap test and still fouled). I thought if gas is getting to the point of ignition, but the plug keeps getting fouled by gas, then it's simply not sparking. Which means either (a) poor or no spark, or (b) a fuel mixture that's too lean.I bought new plugs, but it's still running on one cylinder after a cold start. I should also note I have a MAC 2-1 exhaust on the bike from previous owner, could I possibly need to re-jet/tune my carbs to accommodate for that. Anyone have any experience with running 2-1 exhausts?
It would appear as though we're not getting enough fuel to the right side carb, because we injected some up the run-off tube from the bottom of the bowl and it started up and ran on two cylinders from cold. So then we thought it might be a problem with the fuel tube that goes from left to right carb, but that appears to be clear and operates the float bowls correctly. Nothings jammed as far as we could tell.
Did a compression test as well. The left read at 165 psi, and the right read at 160 psi. Both cylinders seem to have the right compression (book says 170-199, but my research indicates 150-165 is more realistic for honda's 400cc twin cylinders).
As far as I can tell, the CDI unit is the only common possible denominator that pops up in all the trouble shooting problem areas (mis-fires when idles, misfires when running, poor acceleration, etc) but my neighboor (expert rider and ex-aviation mechanic) doesn't think that has anything do with the problem.
I'm truly stumped, I don't know what could be causing this to happen. Any input or advice would be appreciated
It would appear as though we're not getting enough fuel to the right side carb, because we injected some up the run-off tube from the bottom of the bowl and it started up and ran on two cylinders from cold. So then we thought it might be a problem with the fuel tube that goes from left to right carb, but that appears to be clear and operates the float bowls correctly. Nothings jammed as far as we could tell.
Did a compression test as well. The left read at 165 psi, and the right read at 160 psi. Both cylinders seem to have the right compression (book says 170-199, but my research indicates 150-165 is more realistic for honda's 400cc twin cylinders).
As far as I can tell, the CDI unit is the only common possible denominator that pops up in all the trouble shooting problem areas (mis-fires when idles, misfires when running, poor acceleration, etc) but my neighboor (expert rider and ex-aviation mechanic) doesn't think that has anything do with the problem.
I'm truly stumped, I don't know what could be causing this to happen. Any input or advice would be appreciated
