Your 250 top speed?

**imdying** · 5th December 2011, 14:43

Originally Posted by nzspokes

Random question, would a fairing like this help my speed?

http://www.trademe.co.nz/motors/moto...-427699138.htm

I think you would be surprised. Bikes are horribly inefficient at cutting through the air, which is why gutless crap like a Lamborghini has a better top speed even though it weights 2 ton and makes fuck all horsepower.

**Ender EnZed** · 5th December 2011, 15:02

Originally Posted by imdying

I think you would be surprised. Bikes are horribly inefficient at cutting through the air, which is why gutless crap like a Lamborghini has a better top speed even though it weights 2 ton and makes fuck all horsepower.

Would a big fairing like that be that much more efficient than a rider crouched over the tank? It's got a fair bit of extra air to move.

**nzspokes** · 5th December 2011, 15:19

Originally Posted by imdying

I think you would be surprised. Bikes are horribly inefficient at cutting through the air, which is why gutless crap like a Lamborghini has a better top speed even though it weights 2 ton and makes fuck all horsepower.

Thats my thoughts to. But he says it weighs 25kg so im going to give it a miss and find something lighter.

**imdying** · 5th December 2011, 15:22

I don't know, but I would hazard a guess and say yes.

Compared to car, a bike is basically an aerodynamic brick. 300hp cars seem to get to 300km/hr just fine, even though they weigh over a thousand kilos. An average road bike weighs maybe 200kg and needs around 150hp to get to 300km/hr.

Leaning forward on the tank doesn't negate the front being all flat/bumpy with horrible forks/radiators and other un-aerodynamic shite. Even with all the flash fluid dynamic models in the world, they still don't know a lot, other than pointy objects have a lower cd.

All those figures are obviously just ball park shite to get a point across... anybody looking deeply into them and arguing them will either be ignored as a git, or scathingly ripped into in a manner not seen on KB for a wee while, at my discretion.

**imdying** · 5th December 2011, 15:24

Originally Posted by nzspokes

Thats my thoughts to. But he says it weighs 25kg so im going to give it a miss and find something lighter.

Bloody 'ell, 25kg

Yeah, the concept itself is fine, but yeah look for something lighter. Basically all you want is a top fairing from any thin and pointy. Assuming you don't go so thin as to have nothing to hide behind, then thinner is better. Have a good look at recent 125 and 250 GP bikes for pointers. They also go to the trouble of cleaning up the air coming off the bike too, FWIW.

**Ender EnZed** · 5th December 2011, 15:41

At $10 this might be worth a try if you can get it to Auckland somehow.

http://www.trademe.co.nz/motors/moto...-427811284.htm

**imdying** · 5th December 2011, 15:52

That'd be a good start... tallish wide-ish screen to push the air over you whilst you're tucked.

Anyone remember the CBR600RR double bubble screen test they did in PB? Something crazy like a 19% improvement in the 140-150mph time just by changing to a double bubble. That's cheap HP right there.

At <100mph you're looking at picking up percentage points, not wholes, but every little bit counts right.

**nzspokes** · 5th December 2011, 15:58

Mount it to the forks and have it turn with the bars? Cant see how else it would work?

**imdying** · 5th December 2011, 16:11

Haven't been in that position before, might pay to ask an old codger

TBH though, on a CBX250, I'd be looking for things to increase comfort... you're not going to cut your trip time down appreciably. Having said that, a GP125 isn't a slouch... but I've taken craps that weigh more than those.

**nzspokes** · 5th December 2011, 16:25

Originally Posted by imdying

Haven't been in that position before, might pay to ask an old codger

TBH though, on a CBX250, I'd be looking for things to increase comfort... you're not going to cut your trip time down appreciably. Having said that, a GP125 isn't a slouch... but I've taken craps that weigh more than those.

Comfort is fine but speed from 100 to 130 is an issue. Mainly for overtaking. Another 10% would make a huge difference. And at that speed a fairing could well help. I have a small Givi screen on that will help so maybe a bigger one.

Dont really think that CBR one would work out in the long run.

**imdying** · 5th December 2011, 16:46

I wonder if an XR500 motor would fit in there

**nzspokes** · 5th December 2011, 16:52

Originally Posted by imdying

I wonder if an XR500 motor would fit in there

Pretty sure that or XR600 motor would if you could get one.

**nzspokes** · 5th December 2011, 20:02

Went get a gasket for my Xr, turns out the guy has a genuine CBX250rs front fairing somewhere. Hes going to dig it out for me.

**ducatilover** · 5th December 2011, 20:53

Originally Posted by Fast Eddie

'Atta boy

I have the ollld 900 must be a vintage soon

Mine's older

The ZZR is definitely a dinosaur.

Originally Posted by Ender EnZed

At $10 this might be worth a try if you can get it to Auckland somehow.

http://www.trademe.co.nz/motors/moto...-427811284.htm

That was on my old Spada, someone has fucked with the mounts though (had CBR mounts.) good to see my paint has lasted. They've done a good job of ruining the headlight mount I made...no idea what they've done to it.
The front guard he's selling was on it too, it was for a Bros650. Some dick has painted it, way to fuck a $300 Tyga guard...

Idiots.