Totally Confused .com
Replaced Stock Pipes with S&S slash cut Slip-ons ..result = popping on the on the down so after seeking some advise i get myself a power commander 5 but dynajet have no data for the S&S slipons with stock intake in fact i cant find any data for S&S can i close match to other slipons is so and ideas
2002 softail fxst

 

The advice you got may have been a bum steer? I would have perhaps advised to get a Vance and Hines Fuel Pak 3 and use the 'auto-tune' facility if the setup of your bike wasn't available already?
I am no expert but surmise the Power Commander doesn't offer the 'auto-tune' option?

 

Slip-ons shouldn't mess up how your bike runs, did you change the headers also?

 

Popping on closed throttle is 99 times out a 100 down to a poor seal in the exhaust system, allowing air back into the system and igniting. Make sure the headers are tightened to spec, and if you used the old muffler clamps on the slip ons, get a new set. They are a one time use item.

A smear of copper grease on the muffler to header join helps 2 ways. Easier to remove next time around and helps to seal.

 

First, you should post questions about softails in the Softail section.

Second, is an 02 fxst even fuel injected? Mine is a 2000 and has a carb. I believe the fuel injected model would be the fxsti.

 

Double check the torque settings on the clamp that attaches the slipons to the header. Did you use a new clamp? They are supposed to be one time use, though some can get more than one use from them.

 

Did you have to fight to get the old mufflers off? If you did,maybe you moved the pipes at the heads,and ruined the gaskets.

 

thanks for the quick response guys this has given me plenty of things to be getting on with over the next few days post results shortly cheers

 

My Bad !! new to this also your right there should have been a i as in injection 2002 was the year of the switch early 2002 carb then the change over later 2002

 

Exhaust leak.