bolt ons with stock computer


I have a 2004 and thinking of buying a used set of akropovic bolt ons. I have K and N filter. Will the bike run fine with the stock computer or will I have to put in a power commander?


Seasoned Beef
Donating Member
Also it's possible you'll shed a little weight by losing the stock cans. You can weigh them and let us know.


can anyone tell me what they sound like?

I find stock exhaust to quiet. do the akropovics have deep throaty sound

Busa Phil

I'm searching around for some information and found this to be interesting. I have a 2007 Busa currently with Yoshi RS3 slip-ons, stock air box, and no power commander. Tomorrow I am putting in a K&N air filter and iridium plugs. Do I need a power commander? Do you think it will run lean and be harmful to the motor?

There is a tuner close by who will tune the bike for $165 if I get a power commander. What difference in power do you think the bike would produce if I ditched the yosh pipes and went with a full muzzy, small box mod, and got it tuned? Thanks for your comments. I sort of have my own answers in my head but I'd like to have some other opinions. The tuner also told me I should think about installing new friction plates. Is there any truth to this? I am the only owner with about 15k on it. It has been ran on an 8th mile track roughly 20 passes. Other than, it's been normal street use (for a busa).

Busa Phil

ok i just picked up a used pcIII on ebay for $150.00 shipped. Can't hurt. So what do you guys think about the mods. Will it really wake it up? I don't want to change the gearing as I ride a lot on the highway. The most I would consider is -1 in the front.


Jumps from perfectly good Airplanes
Donating Member
Leave the ECU alone for just bolt on's and a K&N. The bike is plenty fast enough, and the Bolt ons will change the exhaust tone plenty. Marble mod prevents popping. IMHO the PC is a waste unless you are just determined to wring out more HP, and the payout to cost/potential trouble ratio isn't worth it. Install the bolt ons and ride it for awhile before you think about tuning it.

michael t

Ive got BMC filter my own small air box mod and R22 mufflers Bike has all the power I want for street use . I shift at 10500 on my tach and that seems to be on the money Red line seems to much for stock motor off power by then

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