The fastest ninja 250r on the road FOR SALE

**5150** · 24th August 2011, 09:50

Originally Posted by DrunkenMistake

Then youll never get to 88!

Aha, so it's not the fasted 250 Ninja.

**SimJen** · 24th August 2011, 09:52

if its got oversized pistons then its also not the fastest Ninja 250! its probably closer to 260/270!
Oh to be 16 again and full of it!

**redhat** · 24th August 2011, 09:54

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**SimJen** · 24th August 2011, 10:03

I'd just buy a two stroke 250 and kick its ass well and truly.
my NSR250SP had 60hp and weighed considerably less than the bloaty Ninja with real brakes and suspension it would run rings around it. I sold it for just over $6k!
Top speed was 200+ dependant on gearing.

**5150** · 24th August 2011, 10:19

Originally Posted by SimJen

Top speed was 200+ dependant on gearing.

And on how many pies were consumed that morning

**bogan** · 24th August 2011, 10:25

Originally Posted by SimJen

I'd just buy a two stroke 250 and kick its ass well and truly.
my NSR250SP had 60hp and weighed considerably less than the bloaty Ninja with real brakes and suspension it would run rings around it. I sold it for just over $6k!
Top speed was 200+ dependant on gearing.

Speaking of which, my KR-1 was a parralel twin just like this ninja, except it did 195 (indicated) with fucked powervalves and scored barrels (due to mismatched rings)

Maybe he figured out how to 2T a 4T. By a copious but strategic addition of powerbands would be my guess.

**5150** · 24th August 2011, 10:25

Originally Posted by Sable

Sounds more like a comprehensive blowup rebuild to me.. were you sitting at redline for 5 minutes trying to show off?

Why it's a big bang motor.

**fatzx10r** · 24th August 2011, 10:29

Originally Posted by bmx695

here is the list of mods

New oversize pistons, rings, wrist pin, and clips

Bore cylinders
New Top End gasket set
New Valves both intake and exhaust
New valve seals
Check valve guides
Measure and/or test valve springs
Cut valve seats
Clean engine parts
New cam chain
New cam chain sprockets
Check Cam chain Guides and adjuster

That was what i got of the last service sheet

going to put up the dyno sheet soon

looking at that list it sounds like you might have dropped a valve

**nudemetalz** · 24th August 2011, 10:47

Out of all of the parallel twin 4T Kwaka 250's which is the fastest? I thought the late '80s GPX250's made more hp than these Ninja 250Rs. The GPX I rode back in the '80s then just did 165km/h and after 155km/h was a crawl for more speed !!

I also think my old 1985 tandem twin KR-250 would eat one of these alive too..before eating itself alive ..

**bogan** · 24th August 2011, 10:53

Originally Posted by nudemetalz

I also think my old 1985 tandem twin KR-250 would eat one of these alive too..before eating itself alive ..

Those tandem twins weren't at all picky with the relative crank angles right? Could get some intersting sounds out of them I would imagine.

**ducatilover** · 24th August 2011, 11:06

Originally Posted by bogan

Speaking of which, my KR-1 was a parralel twin just like this ninja, except it did 195 (indicated) with fucked powervalves and scored barrels (due to mismatched rings)

Maybe he figured out how to 2T a 4T. By a copious but strategic addition of powerbands would be my guess.

chaosRider was going to make his Hyosung 2stroke I think....

Originally Posted by nudemetalz

Out of all of the parallel twin 4T Kwaka 250's which is the fastest? I thought the late '80s GPX250's made more hp than these Ninja 250Rs. The GPX I rode back in the '80s then just did 165km/h and after 155km/h was a crawl for more speed !!

I also think my old 1985 tandem twin KR-250 would eat one of these alive too..before eating itself alive ..

the GPX250R with te twin front brakes, had circa 40-45hp, can't remember though, they're too shit.

Dyno sheet time, this must have been before the powerband got installed.

Yet again, my embed image failed, someone can fix it though.
Look at the massive power it has. It'll be giving Hyosung's a go!

**Quasievil** · 24th August 2011, 11:10

Originally Posted by bmx695

Please no time wasters

Damn I was going to try and ride this beast !

**nudemetalz** · 24th August 2011, 11:17

Originally Posted by ducatilover

Yet again, my embed image failed, someone can fix it though.
Look at the massive power it has. It'll be giving Hyosung's a go!

My maths must crap because out of the nearly parallel power curves I'm trying to find 20% extra....

And yup Bogan, when you could tune them properly they went rather well. Getting the disc valves right and then modifying them worked well. I saw 190km/h indicated out of mine down a loooonnng straight of errr...umm "track"...
Prob more like 180km/h though. Still good for 1985 2T technology.
And they made a great sound with some aftermarket cans on the pipes.

Ooops, sorry,.. back to the Rossi-influenced 250R.

**ducatilover** · 24th August 2011, 11:23

Originally Posted by nudemetalz

My maths must crap because out of the nearly parallel power curves I'm trying to find 20% extra....

It's after the rebuild and there may be a 3hp gain at absolute max over stock, usually they're 24-25rwhp depending on altitude, dyno etc etc

And yup Bogan, when you could tune them properly they went rather well. Getting the disc valves right and then modifying them worked well. I saw 190km/h indicated out of mine down a loooonnng straight of errr...umm "track"...
Prob more like 180km/h though. Still good for 1985 2T technology.
And they made a great sound with some aftermarket cans on the pipes.

That's doing bloody well

Ooops, sorry,.. back to the Rossi-influenced 250R.

Good man