+1 Red, Aken, Rady, and Stay2uned.

A couple of you fellas need to read up on inaccurate stock speedos. :p

I've heard stated (can't confirm) that our speedos are off up to 10%. That turns that 170 into 153. Take another 14% off (credit to Aken) for the -1 +2 and you're looking at about 132. Still well above anything you need to do unless you're on an airstrip or the track.

Pardon the bluntness, but I hope none of you are so stupid to be topping your bikes out at those kinds of speeds on public highways. Instant death is nearly assured for you but we're talking about a 400 lb. hunk of metal which is a serious danger to everyone around you, should the worst happen. Reaction times are severely reduced at 150 mph.

+1 to what Randy said.

There's no F4i out there that's gonna do what my RC51 does. ;-)

fastest i've gone up to 115, but i'm a bit worried to go any faster than that.

my speedo said 120. im sure the f4i can do that but i dont think it could do anymore than 150-if that. it feels fast, but not that fast. at 80 its already at like 7 or 8k rpms in 6 gear

only way to tell true speed is by rpm's since are speedos are off so much even straight from the factory. go to Gearingcommander.com it will open your eyes!

if im reading the chart right, it says that the top speed of a 06 600rr at 15k is 167, that seems pretty high to me

not high really. you will never reach that sped unless you have perfect conditons and a lot of other stuff. lol you can in fact reach that speed with mods out the ass and gearing

havent had my f4i up very high, but last summer i had a ninja 500, and at 100 indicated i was doing 95, gps in my backpack, and i hit 125 indicated up a hill, im pretty sure it could hit 120 - 125 actual on flat ground, so im wondering if the top speed of the f4is and rr are gearing or hp limited? ive read around 165 for the rr and 155 ish for the f4i

Gearingcommander.com, thats all i got to say. physics dont lie

yeah looks like 119 for my ninja and 153 for the f4i, not like it really matters though, the real reason i got a f4i was for better suspension/brakes