Suzuki NZ250 that has me beat...

[Conquiztador]

The NZ is easily stroked. Have a crank pin made with a offset, fit a spacer under the barrel and get a longer cam chain and you will suddenly have more cc's and more HP. Add to that some HP coating of the piston, valves and inside of head. I have yet to play with the cam, but I am sure I can get a few Hp out of that one too...

Oh and open up the inlet in the head and fit a bigger carbi. Same with the outlet. I have not played with the exhaust, but I recon a Super Trapp on a Dyno after all the other stuff is done should help.

Doing all this I be surprised if there is not 50 - 60 Hp that can be whipped out of her.

My intention is to take one of them (have a couple) to 200K/h

I will keep U posted.

[JimO]

It makes me wonder why not more sporty 250 singles aren't produced currently. They have so many benefits, Deviant listed quite a few, and you only have to see how loved still these bikes are today. CB250RSs are being picked up by older bikers in the UK and fixed up for the commute on weekdays and country lanes in the weekends; SRX250s are still being thrashed around, and customised into flat trackers in Japan; and the few NZ250s around seem to have very happy owners.

A good, solid, high-revving single can make for a very balanced, very light, and very useable bike. It's a shame there's just commuters like the Scorpio being produced (and myriad chook-chasers).

its a laugh really i paid a grand for the one i bought my boys but if it was a cbr 250 itwould have been 4 grand total waste of good $$$ if you arx me, its a step to a bigger bike and its probably going to get a hammering but for a grand who gives a shit

[cowpoos]

one cylinder motor. 40 something Hp as is and can easily be taken higher. 140K/h is normal as is. And she leaves most other 250's in the dust.

So go figure.

not 40 hp dude...33 acctually...I had my 89 model up to 165 regularly back in the day...

Doing all this I be surprised if there is not 50 - 60 Hp that can be whipped out of her.

My intention is to take one of them (have a couple) to 200K/h

I will keep U posted.

and I wouldn't be surpride if it goes BANG!!! 50-60 hp is very very highly tuned for a motor of this type...a modern dirtbike 250cc single with a really high rev ceiling might achieve this...might!!...I doubt it though on pump gas.

It's a modified version of a DRZ engine according to nudemetalz, but others have said it was unique to the NZ.

not so much the DRZ engine...but the slimilar and much older 80's dr250's but with oil cooling and twin over head cams added and Kehin slide draught carb [correct me if I'm wrong...but I'm sure its a slide...as aposed to the DR's CV carb]

and was definatly not a New Zealand only model...

[Conquiztador]

"not 40 hp dude...33 acctually...I had my 89 model up to 165 regularly back in the day..."

It looks like U are right. Sorry re that.


"and I wouldn't be surpride if it goes BANG!!! 50-60 hp is very very highly tuned for a motor of this type...a modern dirtbike 250cc single with a really high rev ceiling might achieve this...might!!...I doubt it though on pump gas."


Well, we see. Keep U posted. :-)


Thanks for that info thou cowpoos.

[Kickaha]

Doing all this I be surprised if there is not 50 - 60 Hp that can be whipped out of her.

I'd be even more surprised if there is 50-60 hp that can be whipped out of one of her

I know the Kart guys were getting this HP out of Moto X 250 bikes, out of a 250 four stroke I doubt you'll get close

[Conquiztador]

I'd be even more surprised if there is 50-60 hp that can be whipped out of one of her

I know the Kart guys were getting this HP out of Moto X 250 bikes, out of a 250 four stroke I doubt you'll get close

U just want me to prove U all wrong and do it. OK, no promises, but I see what I can do...