I think I am in trouble.....

[Nessism]

Plug cap, they unscrew from the ignition wires.

[Cipher]

Did you do the swap to test the coils and plug wires and caps yet?

[76_Mike_82]

Ohhhhhh well I feel dumb. The plug caps have all been replaced in the last few years. But I guess one could go bad. Have not swapped plug wires yet will soon.

[76_Mike_82]

Well swapped the leads and at least for now all four are firing together. For the few minutes I had it running (no gas tank so just the fuel in the carbs) the exhaust is with in a few degrees of each other. Guess I need to put it back together and ride it some with the leads swapped and see what happens.

[Cipher]

This may be as simple as some corroded caps. Be of good cheer.

[60ratrod]

or the connection at the plug cap on the lead is bad. I would try taking off all the caps, do the 1/4" trim back, and reinstall the caps and see what happens

[76_Mike_82]

Ok guys, I need help. I have swapped leads, I have replaced the ignition box, opened the carbs and verified nothing is wrong there and none of this has helped. I am getting ready to dig into the top end to be sure everything is correct there. The current situation is the two cylinders on the left are fine exhaust temp is over 300 degs the two on the right side is just over 100degs. This is after a short ride around the block. Everything I have tried gets the same results. The two on the right have to be firing to get the temperature up but not enough. Is it possible the cam chain jumped? Other thoughts?

[yank]

Carburetors.

[76_Mike_82]

I am going to need more, I just had the carbs apart for an inspection and found nothing. Although as soon as I get drain gaskets I have another rack I will be able to swap out and try.

[Cipher]

Do not open the motor. This is not the motor if the problem moved\disappeared for a while after swapping coils.

[yank]

There are passages in the carbs that that could be clogged that visually you would not be able to see. How did you clean them the first time?

[Cipher]

Im betting on plug caps leads or coil connectors. Maybe the wiring harness has a bad spot frayed wire etc.

Carbs are very much a tricky thing. You cannot see inside a passage and assuming a spritz of aerosol passing is a clean bill of health is asking for misery.

[76_Mike_82]

It did not move after swapping coils. The only difference from when this all started is now I'm using the thermometer (not just my hand) and now I know it's two cylinders not at 100% instead of one dead cylinder.
I guess I'll swap the float bowls over to the other carb rack and try them.

[76_Mike_82]

It has been a few years 3 or 4 now but the were dipped at the time. I just find it hard to believe two carbs failed like this. Ran fine for 50 min stopped for a few hours and now this.

[Cipher]

Sorry I though the prob moved or disappeared. Misread you I guess.