S&S 88 Evo 2600 miles

No fire rear cylinder

Replaced ignition module
Coil
Plugs wires

Still when turning over frt cylinder fires get hot
While rear cylinder doesn't.

Any suggestions


Was ridding back last week running good halfway to golf course about 5 miles started missing bad but still ran only one cylinder. Went home it went from running to it stopped. Won't run only fire like wanting to start.

Hope it's not motor damage had 15/20 pounds oil pressure when running.

Any suggestions.

 

check spark on both wires,if you have spark on both,check the compression in the rear cylinder,what ignition are you running?

 

Ultima programing ignition. #53-644
spark in both cylinders
Haven't did compression test.

 

got a valve bent then

 

Pull the rear plug and crank the motor. Put your thumb over the spark plug hole. If you've got compression, you won't be able to hold it there.

I suspect you've got a valve open....

 

ya think?either a bent valve or a friggin hole in the pison

 

I rode back from Myrtle a(bout 250 miles,) in 90 degree heat and couldn't hear that I had a crack in the Y pipe. The next morning I went to start it and the rear exhaust valve hung up and I could hear the piston just tap it. After that, it would only run on the front cylinder too!

Op, let us know what you find...

 

Ouch, that's not what I wanted to hear.

I did put finger over hole it feels strong it blows finger off with a lot of pressure.

Guess it might be time to pull apart

 

if you've got compression in the cylinder,i would tear it apart yet,ide go back to the ignition.

 

Agreed. Compare the pressure felt to the front cylinder just for perspective though. Check the wiring on the single fire ignition (I assume?) and make certain that you hooked up all the wires in the correct sequence. It's probably something simple.