slip-on FMF or yoshi?

when switching to a new slip-on is an efi programer needed or just an optional? put myself into a budget around this time of year

I'd get the programmer first. Without it your just interested in noise.

w00ey wrote:

when switching to a new slip-on is an efi programer needed or just an optional? put myself into a budget around this time of year

Plenty have done it. Never heard one say they've damaged their bike doing it.

Is your airbox still in stock condition? No holes, no after-market air filter, no door removed....?

If the intake side is still stock you can get the slip-on and not worry much.

The downside is you won't feel like you've gained much until you get a programmer, and then open up the intake side as well.

yeah i havent changed any of the intake parts, few people have told me to definetly change the air filter but i wasnt sure about an EFI upgrade, cheers for the advice fella's