Dynojet PCIIIUSB, by far. Had a huge hole in my power band from 4500-6000. After the power commander: no hole, better throttle response, more power and torque at low and mid-range RPMs, and best of all- easier to wheelie...

 

um...my undertail is my favorite mod its pretty much the only one ive done
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Lovely Wendie

 

my favorite mod... for the money i would have to say new turn signals. stock ones are hideous.

 

One down one the front sprocket.. and the gold chain... Love it wheelies and it makes it so fast..

 

FE wins.

 

+1 on that. HID's on my car was great. The HID kit on the bike is now on order......can't wait to get them 10000k babies installed.

 

whats the price of a good HID set-up?

 

A good one is going to run you about $350-400 bucks for both the high beams and low beams. I'll let you guys know what I paid for mine as soon as I find out for sure that they're not crap, then I'll spread the word.

 

Frame Sliders and HID's.

 

I would say the best mod I've ever done is getting lighter wheels for my bike. I'
ve always felt the F4ias a pig coming fromriding 2-stroke 250s. After mywheel mod, centrifugal force is no longer an issue for me and I can fling my F4i left and right.F4i OEM stock rims (front and rear) weighted approximately 25#s. Marchesini Aluminum wheels were~19#s. I'm not going to pretend to be a racer or an engineer but from what I've read and understand, it's all about rotational mass.I can attest it's not just my mind playing tricks on me. Running lighter wheels do make a difference. Cheers! -Sy