Hi all
I have a 1987 883 sportster that for some reason doesn't seem to be firing on the rear cylinder?
It is still running points etc so i replaced the points, condenser, plugs and leads but still same problem.
Checked the static timing etc.
The front cylinder gets hot as anything and the rear barely warms.
There is spark at both plugs and gas is getting to both.

Does anyone know what maybe causing this to happen?
Any suggestions or knowledge would be most appreciated as it has me stumped.

 replace the inlet manifold to head seals, & make sure thefuel tank & carb are cleaned & jeted proper to start with