vtr 250 resticted or not?

[prawny1]

Hi ive just purchaced a japanese market vtr 250, 2000 model and was told that the bike had been de restricted, but as far as i am aware japanese market bikes are restricted to a top speed of 112 mph, so why would this bike be restricted, and what would the restriction have been, I ask because i have given the bike a good check over and can't find anything that has been modified.

[Korea]

Welcome to KB :niceone:

Jap import bikes often come restricted to 180kmph/112Mph (like you said) by a cut-out/rev limiter thingamagig in the speedo or other means.

You say your VTR250 has been de-restricted? Do they actually get up to 180kmph/112Mph in the first place?
I think about 95Mph is probably more realistic on a 250 twin.

Other restrictions (like for Australian learner licence rider market) include: throttle not opening fully as standard, carb intake being partially blocked, or bits in the exhaust to restrict the breathing.
Not sure which one of these may apply in your case so I'll hand you over to the experts at KB to fill you in.

Good luck with that, and safe riding~!

[imdying]

I can't imagine a VT250 actually needing to be restricted :no:

[FlangMasterJ]

Do they actually get up to 180kmph/112Mph in the first place?
I think about 95Mph is probably more realistic on a 250 twin.

....and thats with a tail wind.

[McJim]

Doubt if they're restricted but it is possible to make em a little quicker with de-baffling the exhaust and fiddling with the carbs. Limbimtimwim apparently did a bit of work on one before selling it to the police - there's a thread with some discussion on the work...ahh here it is.

http://www.kiwibiker.co.nz/forums/showthread.php?t=17491

[SARGE]

i hear terminal velocity is about 320 km/h.. but you'd have to shove it over a cliff and wait 15 seconds..:Pokey:

[hXc]

I can't imagine a VT250 actually needing to be restricted :no:
VT250 is different from a VTR250. And then there's VT250f, VT250k (Spada) and VT250 Magna, which are all different again.

But as said before on KB and many other places, any Jap <250cc built after 1993-1994 is restrcited in some way. They will all have a 40hp restriction, so any bike built before then with more than 40hp (most of them), will now only have 40hp (at crank), and if below 40hp in the first place will have an exhaust, carb or gearbox/engine restriction.

[McJim]

'Out the Box' hp at crank on a VTR250 is only 32bhp. I believe the Spada is 35bhp at crank. I regret not buying a Spada when I had the chance (didn't know enough about bikes at the time to know that 35,000km is not that big a deal) got a VTR with low k's for reliability reasons but paid a lot of money for it.

I was thinking about fiddling with the bugger to make it go faster but will be sitting my restricted at the beginning of Nov and then should have my full licence in the first week of Feb. Handlebars are too close to me too - was also thinking about a set of clip ons to get away from the 'sit up and beg' posture (used to be a racing cyclist - very low hand position is more comfortable for me)

I wonder how long I'll be able to obey my wife and keep riding the 250 on a full licence?

[hXc]

'Out the Box' hp at crank on a VTR250 is only 32bhp. I believe the Spada is 35bhp at crank.
Spada = 40.00 horsepower (29.2 kilowatt) @ 12000 RPM

[MSTRS]

I got a carb kit, jets drilled and a performance pipe on mine, opens up the top end but 180 km/hr...no way.

Yes way...if you lift a tooth on the front sprocket

[MSTRS]

Apparently.....
Stands to reason tho....standard bike 160kph, increase the HP AND the gearing = faster top speed

[hXc]

I got a carb kit, jets drilled and a performance pipe on mine, opens up the top end but 180 km/hr...no way.
But yours is also the VTR, which may say R, but is slower than the Spada. This is because the VTR is restricted, whereas the Spada is not.

Which is exactly the point I was making before.

[McJim]

There's a trick to getting over 150kmh on a VTR and it involves paying no attention to the redline of 11,500 rpm. You need to be in 4th gear at about 13,000rpm when you shift to 5th and you need to be real fast (best not to bother with clutch) on the gear change and back on the gas hard. I've also found the little spoiler on the front makes a big difference.

Mine cuts out at 13,000 rpm - must have a limiter or something.

At the end of the day if you want to go really fast then the VTR is not really the bike for you - CBR250RR or just go the whole hog and get NSR250/RGV250/RS250.

I never feel the need to go over 110kph so having a bike with good torque for it's size suits me fine.

D50 likes his for the sound but he's yet to let me hear it so I'll reserve judgement on that for the mo'.:Pokey:

[hXc]

yeah but it wouldnt get close to the 180 restriction standard even now it wouldnt.
I don't know. . .170km on a straight piece of road, but it was fucking windy! I slowed down 'cause I was getting worried about it.


There's a trick to getting over 150kmh on a VTR and it involves paying no attention to the redline of 11,500 rpm. You need to be in 4th gear at about 13,000rpm when you shift to 5th and you need to be real fast (best not to bother with clutch) on the gear change and back on the gas hard. I've also found the little spoiler on the front makes a big difference. And the Spada is a 6 speed, the red line is 13,500 and the rev limiter kicks in at 14,000rpm. So I suspect that the Spada is a lot faster than the said VTR's, that these two own.


Mine cuts out at 13,000 rpm - must have a limiter or something. Rev limiter. Factory thing to protect engine. Will just start mis-fire, usually

[McJim]

And the Spada is a 6 speed, the red line is 13,500 and the rev limiter kicks in at 14,000rpm. So I suspect that the Spada is a lot faster than the said VTR's, that these two own.

Ahh yes - but the joy is that because I'm an old fart with a Learner's licence I should be out shopping for a proper bike by February:nya:

Less than a month until my restricted and only 3 months after that my FULL LICENCE Muwahahahaha! Hmmmm VTR1000? TL1000? SV1000? Raptor1000? Ducati Monster? the choices! I'm luvvin' it!

[McJim]

its getting tuned on friday by botany honda...its got a pretty cool sound for a little bike with the carbon pipe and all.

So when you bringing it round to let me hear it?

[hXc]

Ahh yes - but the joy is that because I'm an old fart with a Learner's licence I should be out shopping for a proper bike by February:nya: Well I'm shopping for a proper bike in February too! Just not going to say that it's February 2008. . .Shit! I just did. . .Oh well.


Less than a month until my restricted and only 3 months after that my FULL LICENCE Muwahahahaha! Hmmmm VTR1000? TL1000s? SV1000? Raptor1000? Ducati Monster? the choices! I'm luvvin' it!Either of those two. They win hands down:cool::2thumbsup

[yungatart]

Well I'm shopping for a proper bike in February too! Just not going to say that it's February 2008. . .Shit! I just did. . .Oh well.

Either of those two. They win hands down:cool::2thumbsup

Will you have paid off the other one by then????:whistle:

[hXc]

Will you have paid off the other one by then????:whistle:That's a tender subject. Another slice, anyone?

[McJim]

Either of those two. They win hands down:cool::2thumbsup

I'm gonna reserve judgement until I park my arse on them and take 'em for a blart through some twisties - then I'll decide on what my weapon of choice will be.

I'm hooked on V-Twins though....

Back to the topic - it would be very interesting to get a Spada and a VTR in one place - dismantle the engines and play "Spot the Difference" to see what they used to do and compare it to what they do now. Y'never know we might spot something very simple and we'll be able to charge loadsa dosh for giving people's VTRs 8 extra ponies. I believe the engines are basically the same but haven't investigated this so will happily stand corrected if I'm wrong.

[S&S]

its getting tuned on friday by botany honda...its got a pretty cool sound for a little bike with the carbon pipe and all.


That VTR of yours is a mean little bike, sounds bloody good & pretty quick for a 250.

Am keen to see it after all the work you've had done to it.

[hXc]

I believe the engines are basically the same but haven't investigated this so will happily stand corrected if I'm wrong.
Apparently they're not that similar actually. I can't remember where I heard this but yeah. I don't know if it's true or not either, but one main difference would be 6 speed (Spada) vs. 5 speed (VTR).

[S&S]

It will be back 100% on the road this weekend...dont know how much longer i will have it though.

Next owner is going to have a bloody nice bike for a 250.

Your getting rid of it?... so whats next? GSXR 400 / NC30 ?

[McJim]

Apparently they're not that similar actually. I can't remember where I heard this but yeah. I don't know if it's true or not either, but one main difference would be 6 speed (Spada) vs. 5 speed (VTR).

Putting a different gearbox will not change the HP at crank - I'm talking about the differences that cause a 249cc 90 degree V-Twin to generate 8 more hp at the crank - is bore and stroke the same? - do they run at the same compression? Is the difference in the carbs or is it something more fundamental? - are they totally different engines or do they share 80% of components?

i.e. different gearbox does not mean different engine.

[hXc]

Just search on google for engine specs for a vtr and a spada. Then compare them.

[MSTRS]

Just search on google for engine specs for a vtr and a spada. Then compare them.

not as much fun as pulling 'em to bits...

[McJim]

not as much fun as pulling 'em to bits...

I agree, and besides, I've found various spec sheets for the Spada - all different! Ranging from 34bhp to 40bhp for the same model bike! some claim 2 valves per cyl some 4...could have my work cut out for me just comparing 1989 Spada to 1989 Spada.

Shame I'm not interested enough in the subject any more...off to find a thread with titties in it..:)

[hXc]

some claim 2 valves per cyl some 4
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