Thruxton won't start.
2004 Thruxton, 69000 miles. I was riding yesterday running fine, and it just quit. I thought I might have heard/felt a pop, but that could have just been the sudden loss of engine running and the compression. The engine would turn over with the starter, but would not fire.
I got it home, tried an igniter that I know is good, still nothing. Checked the pick-up coil per the manual, it is ok. Checked the coil, per the manual it might be bad, so I swooped it out with one from my 2008 Bonneville. Still nothing, the starter will turn over the engine, but not fire. Just for the heck of it I put the coil from the 2004 in the 2008 and the 2008 runs.
Gas flows from the tank fine. There is gas in the float bowls as when I open the drains I get plenty coming out.
Turning the engine over, I feel compression from the exhaust by putting my hand over it.
With air filters off, I feel a lot of back pressure from the right carb with my hand over it, none from the left carb, this is with the engine turning over with the starter. Also too, no pressure out of the left spark plug hole, some from the right one, turning the engine over with the starter, this by just holding a finger over the plug holes.
Besides not good, any thoughts? I have my suspicions, but I am looking for other opinions before I go from here. Thanks for any help.