Your 250 top speed?

[ducatilover]

I'll hold the camera for the spanky thing.

[RDjase]

My son 142Kmh out of a FXR150 at Manfeild on back straight on the rev limiter
No speedo but did the maths on gera ratios etc

Heres the FXR top speed thread,

http://www.kiwibiker.co.nz/forums/sh...-FXR-top-speed

It has all the figures to work out top speed, just find the Primary, gearbox and sprocket sizes to work out your REAL top speed

He had fun on the CBR but it wasnt on the limiter, the FXR was Bloody hoon

Transmission:
Clutch: Wet multi-plate type
Transmission: 6-speed constant mesh
Gearshift pattern: 1 down 5 up
Primary reduction ratio: 3.500 (70/20)
Final reduction ratio: 3.428 (48/14)
Gear ratios, Low: 3.000 (33/11)
2nd : 1.857 (26/14)
3nd : 1.368 (26/19)
4th : 1.095 (23/21)
5th : 0.923 (24/26)
Top : 0.800 (20/25)
Drive chain: RK 428HO, 132


13000rpm divided by 3.5 (primary ratio) = 3714rpm (clutch hub rpm)

3714rpm diveded by 0.800(top gear) = 4642rpm (front sprocket rpm)

4642rpm diveded by 3.5 (final drive, 49/14) = 1326rpm (wheel rpm)

1326 x 0.001795 ( wheel circumfrance in Km, 1.795 mtr) = 2.38 kpm (kilometres per minute)

2.38 x 60 = 142.8 kmh


If you work out the wheel circumfrance by the 100/80 17 sizing (aspect ratio over width the wheel diameter ) = 1.855 mtrs. I measured the wheel cicumfrance from the valve down, marked the concrete and measure the length after one turn back to the valve down
Dont know if there would be any tyre swell at those speeds to change the amount?

When we were working out ratios and speeds with my mates drag bike they had 2 height/circumfrace changes from tyre swell. It was doing 145mph tho

[racefactory]

Just over 200kph on a ZXR250c

[Genie]

Just over 200kph on a ZXR250c

That's just fun times....beginning.

[SMOKEU]

Just over 200kph on a ZXR250c

Indicated 200kmh, but what was the real speed?

[ducatilover]

Indicated 200kmh, but what was the real speed?

They've been clocked just over 200 in the flying quarter before and a ZXR can't indicate 200, unless it's the less powerful Malaysian model with the 240km speedo.

[racefactory]

Over 200 on gps, it was off the clock reading.

[Crazy Steve]

Over 200 on gps, it was off the clock reading.

Dreamer ! !

Crazy Steve.

[racefactory]

There you go again steve, always in that state of blatant denial that anything apart from your busa's are not worth the metal they're made of and can move at all.

As already mentioned- dairy flat road i've ''witnessed'' a ZXR250 at 202kph using GPS on the slight downhill. Hit the rev limiter... it will do more with gearing of course. They dyno at 204kph.

[ducatilover]

A few have clocked a smidgen over 200 on the flying quarter, very impressive for what they are. But, they're still slow. My 400 will out run one and it's slow.

[Gibbo89]

A few have clocked a smidgen over 200 on the flying quarter, very impressive for what they are. But, they're still slow. My 400 will out run one and it's slow.

But you gotta remember who they are accommodating; learners in this country. If a learner is sitting on a bike that he knows can get up to say 180 then they would be pretty stoked with that. I'm assuming they are an alright track bike too...?

[sil3nt]

There you go again steve, always in that state of blatant denial that anything apart from your busa's are not worth the metal they're made of and can move at all.

As already mentioned- dairy flat road i've ''witnessed'' a ZXR250 at 202kph using GPS on the slight downhill. Hit the rev limiter... it will do more with gearing of course. They dyno at 204kph.

You sure it wasn't a 400
http://www.youtube.com/watch?v=1mXcuSjLyc0

[Crazy Steve]

There you go again steve, always in that state of blatant denial that anything apart from your busa's are not worth the metal they're made of and can move at all.

As already mentioned- dairy flat road i've ''witnessed'' a ZXR250 at 202kph using GPS on the slight downhill. Hit the rev limiter... it will do more with gearing of course. They dyno at 204kph.

I tell ya what DREAMER.. Come into Auckland City tonight with said ZXR250 and we wil go for a ride on the southern motorway at 2am I will stick at a true 195kph and if you pass me I will give you 2 $100 notes ! !

If you don't pass me.. YOU LEAVE KB FOR EVER !

Crazy Steve.

[ducatilover]

I tell ya what DREAMER.. Come into Auckland City tonight with said ZXR250 and we wil go for a ride on the southern motorway at 2am I will stick at a true 195kph and if you pass me I will give you 2 $100 notes ! !

If you don't pass me.. YOU LEAVE KB FOR EVER !

Crazy Steve.

I'm watching.

But you gotta remember who they are accommodating; learners in this country. If a learner is sitting on a bike that he knows can get up to say 180 then they would be pretty stoked with that. I'm assuming they are an alright track bike too...?

This is very true, they are a great fun little thing to ride and thrash the pants off. I love them on a twisty road when I'm in the mood, but, I'd much rather a bit of torque too...for those hills and the traffic.

[Gibbo89]

This is very true, they are a great fun little thing to ride and thrash the pants off. I love them on a twisty road when I'm in the mood, but, I'd much rather a bit of torque too...for those hills and the traffic.

Yip, it's the same with my zeal. It's fine for now, but can't wait to get something bigger.