Went to start my 97 Heritage Softail Classic this morning. Started and idled just fine. Went to throttle out of the garage and I had next to no acceleration. Serious lag. Had to really twist on it to keep it from dying.

Any thoughts on where I can start troubleshooting? Thanks

97 FLSTC
S&S Super E Carb
Stock everywhere else
40k miles

 

My first step would be to clean the carb and jets.

 

If that doesn't do anything check the screen on the petcock to make sure it isn't partially clogged.

 

If you are still using the vacuum petcock, make sure nothing funky is going on with that.

 

Make sure the throttle/idle cables are operating the way they should.