2008 or newer R1

[101lifts2]

Originally Posted by Dave

the us spec yam shuts the butterflys on you as revs increase. up to 60% at redline. the fix is...expensive.

to be fair the kawi does this too though somewhat less intrusively and is quite a bit easier (and cheaper) to banish

Are you taking about the exhaust butterflys? I think this is only to warm up the cat faster, no?

[Dave]

Originally Posted by 101lifts2

Are you taking about the exhaust butterflys? I think this is only to warm up the cat faster, no?

No. The throttle butterfly's. The us spec r1 does NOT give the rider full power under any condition.