I recently did a master rebuild on my S&S Super E and added a Yost power tube. I had a 072 main jet and a 0295 low speed jet, I replaced them with a 074 main and a 031 low speed. My problem is that the bike now has no power or torque. Sitting still the bike rev's fine but when I ride it I almost have to rev the bike and slip the clutch to start. The spark plugs are reading fine as far as the mixture goes. The bike has the double plugged heads and a Crane elect. ignition. Does anyone have any suggestions?........please!

 

When changing parts, it's important to not mix and match parts form one kit to another and likewise to mix stock parts with kit parts. They do not work well together at all. Was there a reason to change the jetting from what you had?

 

I changed the jets b/c Yost recommended it after installing the power tube.

 

I would suggest changing back to your previous set up again and see where you go from there.