Derestricting an import!!!…HELP!!!…

Viper · Get off my bloody bike! Joined: 04 Feb 2002 Karma :

After a year of agony riding a restricted NSR, this weekend I FINALLY took out the intake and exhaust restrictors!
Finally I thought I would have a bit of power...great.. 8)
So imagine my severe dissapointment, when I took it for a test ride to find that my top speed had only improved by about 3mph!!!! :o
I'm now only hitting about 65mph(on a flat), and cant get any more than 11,000rpm. Crying or Very sad

So to detect whether the servo was moving, me and me otherhalf stuck some insulation tape between the servo cable-pulley-wheel-thing, and the servo body.
I then took the bike out to 10,500rpm, and got back to find the tape hadn't moved!! Crying or Very sad

So as my servo not moving AT ALL, we assume it must be restricted via the CDI.
So is it possible to get the servo moving without replacing the CDI, otherwise why would they have fitted the damn servo to the bike in the first place!!!?!?!! Confused

On an RD125 it is possible to pin the exhaust valve open, so could you do this on an NSR???? Confused

Or is it possible to move the servo manually?
If we connect a 12V reverse polarity current, will this move the servo in the other direction?!?!? Confused

Basically . . . H E L P ! !
Has anyone here derestricted an import?
Anyone have any advice!! Confused

Please!!

Viper · Get off my bloody bike! Joined: 04 Feb 2002 Karma :

Also....
does anyone know where i can get hold of a wiring diagram for a 2001 model??

Dylan · Trackday Trickster Joined: 03 Feb 2002 Karma :

https://translate.google.com/translate_c?hl=en&u=https://www.devader.de/&prev=/search%3Fq%3Dnsronline%26hl%3Den

and

https://translate.google.com/translate_c?hl=en&sl=de&u=https://mitglied.lycos.de/nsronline/&prev=/search%3Fq%3Dnsronline%26hl%3Den

Wish i could read pigeon German!!!!
Dylan

Text from a previous post that no one read Crying or Very sad

hope its more use to you!!! Smile

Are you sure its an import, becasue it sounds strange that it would have the standered uk restrictions on an import. Could it just be a broken CDI???? Can test this with a strobe light, best get a garage to do it.
Hope it helps
Dylan

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Does the valve open and close when the ignition is turned on? My guess would be the control unit for the valve is either disconnected or fried (happens on the Cagiva Freccia and Mito, and they could well use the same control unit).

Also has the valve seized up from running round at low revs for the past year/s

All the best

Keith

scabzilla · Borekit Bruiser Joined: 31 Mar 2002 Karma :

Hey viper, u buy your import from new ?? if ya did what company you buy it from plz ???

Viper · Get off my bloody bike! Joined: 04 Feb 2002 Karma :

yeah, i did buy it new, last March.
Cost me £2700, but that price was a "friends discount".
It came from Tony Moto nr Southampton. (they advertise in biketrader)

scabzilla · Borekit Bruiser Joined: 31 Mar 2002 Karma :

yeah i know em there well cheap !

Hibby · Guest

Hi,

Look for a link wire on the black box under the tank possibly red / white if you find one remove it this should enable the power valve. also look for a white and orange link at the back of the bike (under cowl) if found remove.

Hibby

Viper · Get off my bloody bike! Joined: 04 Feb 2002 Karma :

Thankyou Hibby for that crucial info!!!
You are a lifesaver, and i am eternally grateful!! Razz

Now have derestricted bike!!
Yippeee!! Laughing

Doddmaster · World Chat Champion Joined: 02 Feb 2002 Karma :

So how fast does it go now? Is it 85mph like other imports?

Viper · Get off my bloody bike! Joined: 04 Feb 2002 Karma :

Yeah, 85. But i suppose that will have to do!!

GasGas · Two Stroke Sniffer Joined: 24 Feb 2002 Karma :

85????? why do imports only do 85 tops? any techno bods got the answer? I am sure we imp.owners would love to know. Confused

is it something to do with the cdi, could a Uk bike owner give me identification marks from their cdi cos i`m gonna check to see if mine is the same. Has anyone tried to change an import cdi for a uk one?

TiN · Pocket Tin Joined: 14 Feb 2002 Karma :

but is the acceleration the same as a UK bike?

I personally think that acceleration is more important than top speed...

Tin

Dylan · Trackday Trickster Joined: 03 Feb 2002 Karma :

Has any one readlined there import in top???? If so what is top speed?? Mine does about 90mph, but its got only a 13 front sproket.
Dyl

jim-1-2-5 · Guest

I have a 2001 nsr125 that is restricted, I have checked for restrictors in the exhaust and inlet manifold, none of which are present, when I start the bike the servo motor that controls the power valve moves so I don't think that has been bypassed, any other idea's, someone mentioned about an orange and white wire near the back of the bike, what does this do?

Any help would be appreciated.

jim

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Could be worth trying to dyno an import and check the power they are producing. Also try it in several gears, and if you can do it try using a stobe light to check what the timing is doing as the speed goes up.

My guess is one of the following:-
Ignition is retarded above certain revs, maybe only in high / top gear.
The power valve shuts at high revs

Other possibilities are lower compression, different porting, etc

All the best

Keith

Dylan · Trackday Trickster Joined: 03 Feb 2002 Karma :

Ime gonna take my bike for a dyno run next a week saturday. Do u do a run only in one gear then?? Mine does so 90mph, only has a 13 tooth front, shoud do 97mph with the 14 tooth. Its redlining at that point. Mine was made in 1989 though so i think that was before they restricted them. Could someone count the number of teeth on the front sproket on an import plz??? Is 14 standered on the newer ones???
Thanks
Dyl

Hibby · Guest

HI,

The acceleration is the same as a UK spec bike, the problem starts when you are in 5th, from memory it wont fully go through the red line up into sixth and your buggered barely enters the red line zone 88mph tops!!!.

I dont know of any one who has fully deristricted an import, but im guessing the best way is to change the cdi unit for a uk spec bike bought from a breaker. Failling that some one like Stan Stephens might be able to help as they are specialists in 2 stroke tuning, I think they have a help line (check the net).

Regards....Hibby.

Ps I hate to say it but my solution was to sell it and buy a 600.

Claes, sweden · Guest

the imports have 22hp cylinder, the uk bikes have 28-30hp cylinder

Dylan · Trackday Trickster Joined: 03 Feb 2002 Karma :

No point in replaceing cylinders, rc units and and CDI's untill youre sure its one of them, I still think it has a lot to do with the gearing.
Dyl
ps Anyone know if you can cylinder scavenge on these barrels by fileing away at the ports, i wouldnt do it myself, but is the nicasil coating too hard???

GasGas · Two Stroke Sniffer Joined: 24 Feb 2002 Karma :

Hibby, https://www.stanstephens.com/index.htm been there already but me thinks I wont bother tuning the bike, just move up like you did.

Dylan, 13 on the front and cannot redline it in sixth gear, reaches top speed of about 145 kmh downhill to about 9500 rpm. I too reckon the 14 sprocket would help but probably need high revs just to pull away.
Let me know how you get on with the change of gearing.

Gasgas