Hayabusa top speed

[Edbear]

Just been reviewing a vid of a turbo 'busa and noticed the tacho climbed another 1000rpm after pegging the speedo at 220mph! Now my bike is geared for 220kp/h at 12000rpm, redline. Does anyone know what the 'busa is geared to do at 11200rpm, the reading on the vid? I assume some speedo error,so the rev counter would be a more accurate guide to actual top speed.

[Flatcap]

Is that the vid where he gets up to around 120mph on the back wheel? Impressive

[thehollowmen]

They've likely changed the output ratio BUT:
in a perfect world, each gear would be liniar.

Draw a graph, 0 mph at 0 rpm, 220 mph at X rpm (or a "good" number unlikely to have much error) , then work out what an increase of 1000 rpm makes it.

[Edbear]

Is that the vid where he gets up to around 120mph on the back wheel? Impressive

Yep that's the one! Awesome!

[Edbear]

They've likely changed the output ratio BUT:
in a perfect world, each gear would be liniar.

Yeah, that's how I worked out mine, as it's doin' 110kp/h at 6000rpm, but for the 'busa, it doesn't show that figure, he's too busy up on 1 til about 140mph changing up through the gears to I think 4th when he drops the wheel back down and the acceleration from there is breathtaking!

[T.W.R]

Don't know if this will help you Edbear, but since late 2000 (K1 model) the busa is supposed to have been electronically limited to a top speed of 290kmh along with the ZX12R etc. the earlier X & Y models weren't limited & topped out somewhere north of 300

[bugjuice]

try a modified unrestricted bike.. then it'll run both off the gauges, with out breaking much of a sweat. Like you say, it's turboed, so it's most likely geared a little different too

[N4CR]

Okay... easiest thing to do without screwing around with the gearbox is obviously the sprocket sizes..... so change them and you make redline faster/higher speed again or lower for more accell..

[race_demon]

i dunno about you but id probably put a smaller sprocket on for more top speed (lets face it it can do it) so any idea to how fast he was going? ill try and work it out in the meantime think abotu what speed rating his tires are

[race_demon]

hes doing about 246.4mph on the clock so abotu 250mph and big cc racing have a 600hp busa which s still about 1300cc but they also do a 1600cc bore and stroke kit so you could have about 1000hp if done right come on time for atleast 300mph

[Sniper]

Also discussed in this thread http://www.kiwibiker.co.nz/forums/sh...508#post554508

[terbang]

The Busas are speed restricted to 183 MPH though that is easily removed. They also have a system that retards the timing in the lower gears 1 to 4 to keep the power more under control (crude sort of traction control I imagine) this is also easily removed. The engine has a lot of potential though it is still quite lively standard..

[Sniper]

I believe there are some bored out to 1600cc? Is that right?

[Maha]

Pete, from Busa Pete fame, i recall was talking of having his at 300kph in the early hours on the northen m/way.

[onearmedbandit]

i dunno about you but id probably put a smaller sprocket on for more top speed (lets face it it can do it) so any idea to how fast he was going? ill try and work it out in the meantime think abotu what speed rating his tires are

Eh? Don't you mean a larger sprocket on the front?

IE a larger sprocket on the rear increases acceleration so therefore a smaller sprocket on the front would have the same effect.