I'm going to put a set of true duals and a K&N filter with new back plate on my SG. Is it necessary to also put a tuner like a Power Commander at the same time, or will my bike run fine with the stock setting? I will eventualy buy one, but would like to know if it has to be at the same time to run correctly.

 

Stock setting probably wont be to your liking with those add ons.

 

yes

 

I would NOT ride / run that bike without a download or a powercommader installed[sm=badidea.gif]. The bike may run way too lean causing problems. You can do it with slip on's but not a full true dual system. Hope this helps !!!

 

Absolutely required!!!

 

You probably should do something, but it doesn't necessarily have to be a Power Commander. You need to richen the A/F mix a little, and for that purpose, a DFO will do the trick. It is not nearly as precise as the PC nor does it provide a way to alter ignition timing, but it will get you the fuel you need, and it is MUCH less expensive. If and when you decide you want a Power Commander, you can sell the DFO---or if you make no other alterations, you may decide to just stay with the DFO.

Uncle Peepers

 

Harley has a module that they call a Fuel Tuner. I have one on my '04...........bike runs superbly and is never in a lean condition.

 

Get the PCIII.[sm=goodidea.gif]

 

im running mine, with v & h tru duals, k & n, stage one download from the factory and thats it
i took the pc III off, as i had trouble with it.
the bike is going to pop some on decel, but it should not run lean, if anything
mine is running a bit rich, according to the plugs, and im getting 200mi per tank if i stay off the throttle

i would say no, its not totally needed. more hype than anything, and i ve had this bike for year, it has 11,000 mi on it, of which 7,000 i put on since last oct when i got it

 

Best way to figure it out, is to do your mods and then keep an eye on the plugs. grey/brown is a normal color indicating good combustion. dk grey/black is rich, lt grey/white is lean. if you see you're running lean, then you can have a download done to the factory ECM or add a PC III. PC III covers more changes than the factory tuner downloads. Your projected mods aren't all that radical.