EXUP on 2008 FZ1

[mcmeyer1956]

I recently restored the valve to full function. Glad I did. I bought it used in 09 with an after market muffler that was too dam loud. E bayed a factory unit along with cables. Amazing how much low end power I restored. Bike has 46k on it now (as in 46,000 plus miles).
Wanted to get this out there riders.

 

[ballmead]

I think all you are feeling is placebo. It doesn't do much apart from quiet the bike. These bikes don't have much low end power in the first place.
If you want to improve the low and midrange power then get a full Yoshimura system with an ecu flash. That's about as good as it gets without changing engine parts or forced induction.

Sent from my HTC_X9u using Tapatalk

 

[Dustin]

It was my understanding that although EXUP was created for the purpose of improving low RPM response and torque, the second gen FZ1's EXUP system works solely for noise emissions.

I know that my FZR400 and first gen FZ1 both used their EXUP for performance and not emissions. I think it was pretty groundbreaking for the little FZR as well.