Hi all
There's one guy told me that RS125 will fast than NSR250sp(mod) on track? Let's assume it, no mention about weather, personal, just know those two bike's performance? Will RS125 beat up NSR250(mod)? my friend's RS125 was speed up to 230KM(tested by CBR1000RR tach), will it be the real?
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1996 HONDA RS250
1995 MC28 NSR250 SE red/white/green
1994 MC28 NSR250 sp W/ RS250 engine

if you mean the Honda I would say so yes, hung you seem to be obsessed with top end speed, the RS125 will out corner the nsr all day long and one of the later models probably (fontyyy wheres the book of facts) has similar power and is much much lighter.
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MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

nsrmonkey
I agree, just can not believe it 125cc has unbelieveable performance. This weekend we both(NSR250 VS RS125) have competition on track, just know this bike of rs125 before I go.... thanks man,,,
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1996 HONDA RS250
1995 MC28 NSR250 SE red/white/green
1994 MC28 NSR250 sp W/ RS250 engine

If you're a fly weight a decent RS125 would be awesome, 71kg and 45bhp, if you've got the skills you'll destroy the fast group.

Comparing laps the 125 race class and 400cc road class lap times (which as we know the 250 road bikes struggle to match) are very similar at club level - Billy, sub 1.17 Donington national circuit??
The British 125GP (the BSB support race) guys are quicker than either the superstock cup or r6 cup.

I made the mistake once of trying to chase an RS125 through the bus stop at Mallory, bad move, the grip would have come off before the bike turned that fast.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread

And RS125 is a Grand Prix bike. An NSR250 is a road bike. Nuff said.

I've never ridden a 125 GP bike at the local track here, but an example of lap times:

250SP - 1:07.4 (My lap record on Yamaha TZR250SPR & Dunlop GPr70's)
150SS - 1:08.? (NSR150SP highly modded & Bridgestone treadies)
125GP - 1:06.? (RS125 and Honda Thailand rider)
125GP - 1:04.? (RS125 A kit Thai guy call Film who kicks ass in Jap Championship.
250GP - 1:02.? (RS250 A kit, same guy as above who will probably win Jap Championship this year!)
600SS - 1:7.0 (My time after 10 laps on '99 R6 in race spec, Michelin Pilots)
Supers - 1:06.4 (R1 making about 175hp)

So....depending on the track, absolute lap times may favour a big or a small bike.

A well prepped RS125 is as fast or faster down the chute than a 250SP machine making about 20 more ponies. Weight is a big factor here as well as the GP bike cornering a hell of a lot faster.

The Thai guy I mentioned above has been racing in the Jap Championship for the last couple of years, first in the 125 class and last year in the 250's. He's 5 seconds a lap faster than my 250SP time because:

1) RS250
2) A kit on above
3) Slick tyres
4) HRC support
5) 17 years old so still completely insane
6) He's better than me


Of course, #6 above is very often overlooked, especially when mixed with #1~5