GPX-250 vs GT250R

**FilthyLuka** · 22nd July 2007, 08:34

Originally Posted by Fub@r

Oh wow a Honda can do 180kph........the Hyo can do close to 170kph, both of which are loss of license speeds so whats the difference.

one's faster

**Pancakes** · 22nd July 2007, 19:10

I'm so keen to ride one of these 170kph capable Hyo's. Mine is on the redline at 150 and a downwrds slope is the only way to get there. I know the fairings must help cut the air but the whole motor/gearbox unit is the same for all the Hyo 250's. Still yet to see any proof of that top speed but happy to admit I'm wrong if any proof (a bike swap for a few minutes / side by side ride with someone, anything tangible) can be provided. I like my bike but a V-twin with low compression built to be a cheap entry in the market neck in neck with some of the fastest IL4 250's out (bar RGV-R etc)? Please some one prove me wrong, I'm so curious.

**ZeroIndex** · 22nd July 2007, 22:00

Originally Posted by Pancakes

I'm so keen to ride one of these 170kph capable Hyo's. Mine is on the redline at 150 and a downwrds slope is the only way to get there. I know the fairings must help cut the air but the whole motor/gearbox unit is the same for all the Hyo 250's. Still yet to see any proof of that top speed but happy to admit I'm wrong if any proof (a bike swap for a few minutes / side by side ride with someone, anything tangible) can be provided. I like my bike but a V-twin with low compression built to be a cheap entry in the market neck in neck with some of the fastest IL4 250's out (bar RGV-R etc)? Please some one prove me wrong, I'm so curious.

Strangely, the better the air is moved around the vehicle, the faster it will travel... I've seen this from my own bike... when I first got it as a streetfighter, it went fast-ish, but when I chucked on the bit of bikini fairing that it came with, it went slightly faster at the same RPM...

**Pancakes** · 23rd July 2007, 19:31

Originally Posted by ZeroIndex

Strangely, the better the air is moved around the vehicle, the faster it will travel... I've seen this from my own bike... when I first got it as a streetfighter, it went fast-ish, but when I chucked on the bit of bikini fairing that it came with, it went slightly faster at the same RPM...

OK, I'll spell it out. If two bikes with identical drive trains both in top gear are at the same max rev's and one is doing 150 and one is doing 170 then the slower ones clutch or rear wheel is slipping to the tune of 13kph. My clutch isn't slipping and my 250 won't powerslide at 150!

The fairings I agree will help the otherwise identical bike get to speed faster and to a higher speed but you can't go faster in the same gear without the revs rising. Geddit?

**Fub@r** · 23rd July 2007, 19:34

Originally Posted by Pancakes

I'm so keen to ride one of these 170kph capable Hyo's. Mine is on the redline at 150 and a downwrds slope is the only way to get there. I know the fairings must help cut the air but the whole motor/gearbox unit is the same for all the Hyo 250's. Still yet to see any proof of that top speed but happy to admit I'm wrong if any proof (a bike swap for a few minutes / side by side ride with someone, anything tangible) can be provided. I like my bike but a V-twin with low compression built to be a cheap entry in the market neck in neck with some of the fastest IL4 250's out (bar RGV-R etc)? Please some one prove me wrong, I'm so curious.

Heres one:

http://www.youtube.com/watch?v=mYM4RRGgaxI

I always thought unfaired models had different gearing to a faired model?

**Pancakes** · 23rd July 2007, 20:06

Dial up

I'll be back in an hour to comment once the clips opened up!

**ZeroIndex** · 23rd July 2007, 20:24

Originally Posted by Fub@r

Heres one:

http://www.youtube.com/watch?v=mYM4RRGgaxI

I always thought unfaired models had different gearing to a faired model?

i think this one is funnier... yet another reason why to change from those shitty factory Shinko tires...

**karmakillernz** · 23rd July 2007, 20:28

Originally Posted by Fub@r

Heres one:

http://www.youtube.com/watch?v=mYM4RRGgaxI

That's a nice clip!

It's a pity the rider didn't show how long it took to get to ~170kph. It'd be quite interesting to see, say, a 100-170kph time...

**Pancakes** · 23rd July 2007, 20:33

Whats different? I know mine wouldn't pull a higher gear even if it was geared up, I've heard the 650R has different carbs to the nude one. Mine has Mikuni BDS26 twin's. If a 250R has the same I wonder if the internals are compatible?

Mine is also due for the big daddy service and isn't as peppy as it could be, plugs etc feeling old.

**Pancakes** · 23rd July 2007, 20:52

the video below that with the naked one is fast too.

Man I need a new bike, guy at work is selling a VTR too, Hornet on TradeMe I like too, downer.

ATNR will perk me up!

**zeocen** · 23rd July 2007, 21:37

There's a not bad review of the GPX 250 in the latest kiwirider magazine if anyone's interested, summary of the review was that it was a solid commuter and a suprise on the open roads.

....still looks like it hit a bus though

**WarlockNZ** · 24th July 2007, 21:42

I personally had mine up to 165 and that was just below red line on a flat piece of road...

Took a little while to get there tho

**ZeroIndex** · 24th July 2007, 22:01

Originally Posted by Pancakes

OK, I'll spell it out. If two bikes with identical drive trains both in top gear are at the same max rev's and one is doing 150 and one is doing 170 then the slower ones clutch or rear wheel is slipping to the tune of 13kph. My clutch isn't slipping and my 250 won't powerslide at 150!

The fairings I agree will help the otherwise identical bike get to speed faster and to a higher speed but you can't go faster in the same gear without the revs rising. Geddit?

That's funny, cause at first I thought the same, until a very experienced rider (can't remember who it was), informed me otherwise...

**Pancakes** · 24th July 2007, 22:30

Teach me, track down your source and take me to school! I'm happy to learn stuff. Also note my posts after that one.

**WarlockNZ** · 24th July 2007, 22:33

Could be your speedo you know ?? .. i've had chats with Hyo owners and we all reckon our speedo's are wrong.

Your just down the road from me ... I'd be happy to go on a ride and compare the bikes.

Originally Posted by Pancakes

Teach me, track down your source and take me to school! I'm happy to learn stuff. Also note my posts after that one.