Just had my heriatage(twin cam 88) dyno tuned,race tuner,screaming eagle AC,After installing Rush slip ons,with 2" baffle. Now I have a stumble when rolling into throttle hard, and on shifting.(76hp/76 torque) HD says mufflers are to blame. Anyone else experiencied this problem? If so what was the fix?

 

I would say it was a crappy dyno tune.......no way it should stumble after a "dyno tune".

 

Have the same set up on my 07. After tune got 76hp and 87tq. Bike runs like a rice rocket Agree with shooter no way should you have any performance problems. Either take it back or try another tuner.

 

And you paid to have it Dyno tuned that way? Hmmm.....think I'd go see your "dyno" guy. Needs to be redone, at his cost.

 

[sm=icon_ladiesman.gif]I agree with the rest of these guys . Take it back !

 

What year is your bike? I just had a similar experience with my 2006 fatboy, it turned out to be the fuel injectors. H.D went from an 8 degree injector to a 25 degree injector about half way through the model year. I had mine switched out. There is a TSB out about it. I believe it is 1185. I went from the 8 degree to the 25 degree, much better.

 

It's an 06 heritage,Curious,that's what RUSH mufflers also suggested,said there were problems with 06 injecters when they were doing dyno research.It's scheduled for another dyno end of month. They aslo sent me smaller baffles and torque cones to see if it makes a difference.Will call HD about any recall,Thanks.

 

I have a Heritage 07 with the 2 in Rush Mufflers,aSERT along with the SE air intakeand it has not even been duno tuned. I have not had any problems what so ever no were. I love my bike

 

SERT or PCIII, both offer user adjustability to work out minor fuel delivery issues. I have my Fatboy dialed in perfect with my PCIII, andwith only a slight amount of low speed mapping mods.