nc30 de-restriction

[mini_me]

ive done a few searchs and i havent found any information on this..
so i was wondering how i would go about taking the speed limiter out of a nc30
as far i can pick up, i need to buy a little thing that replaces the black box under the seat...
cheers
m/m
edit: never mind ppls, found my answer,
alarumba: what speed does your cbr cut out?

[Coyote]

Also, anyone know about sorting out a CBR250RR aswell?

[John]

Also, anyone know about sorting out a CBR250RR aswell?

Anyone know how to do this on a ZXR250c. :lol:

but mini? do you have a NC30 laying around? if so you lucky devil!

Alarumba, not really much point I think it will struggle to 200, mine manages to get 190 on the speedo came in at 193 on the dyno, dont know - love to try it unrestricted as its still pretty much on the 33bhp limit :/ but I know there is more lerking in there.

I think its the ignition timer or sumin, I dont think I'd bother trying to figure it out.

[oldfart]

I did this on KK's race bike but can't quite remember how, Craft's disease, (can't remember f*&ckin thing). Vaguely recall needing some resistors, round 1/4 watt & chopping shit loads of wires. As I say, this was for his race bike. Weren't to many wires left.

[Two Smoker]

No point on doing it to the CBR/ZXR as it wont really go above 190kmh...

[John]

No point on doing it to the CBR/ZXR as it wont really go above 190kmh...
So a question, if mine does 190+ on the road does that mean its de-restricted?

[mini_me]

john:
my 250 did 195 b4 the restrictor cut in
but it wouldnt do much more than that anyway (17500 rpmin top gear)
m/m

[John]

john:
my 250 did 195 b4 the restrictor cut in
but it wouldnt do much more than that anyway (17500 rpmin top gear)
m/m
Cool thanks for that, did yours manage to pull rather strong till then, mine is at about 13k when it hits the 190(or 195) speedo bit and It wont go up anymore, seems like a waste of RPM..

[Two Smoker]

john:
my 250 did 195 b4 the restrictor cut in
but it wouldnt do much more than that anyway (17500 rpmin top gear)
m/m

if its doing 195kmh it wont have a restrictor... restrictors are set at 180kmh or 190kmh...

You probably reached the peak of the power band....

[TwoSeven]

Also, anyone know about sorting out a CBR250RR aswell?
Go to the jdm forums, there is info there. It requires taking the clocks apart - just moves the 180kph limit to 220kph. Only usefull for the tracks that have very long straights which is why I never bothered.

[bugjuice]

Also, anyone know about sorting out a CBR250RR aswell?
I was told the restricter on CBRs (might be the same for others) was only in 6th at the red line.. Which you won't get anywhere near unless you have the wind behind you, sorry..
My CBR used to run out of puff at 185kph down the back of Puke, and that was around 14 grand or so, can't clearly remember. Have you hit the restricter at all?

[Juan]

The NC35 has a small copper contact that moves around with the speedo needle, take the clocks apart and bend it away from the other contact.... bingo no restriction, do not know if NC30 is the same, sorry

[Kwaka-Kid]

they are the same on both NC35 and 30... have now done, hmm... 4x 30's and 2x 35s... basioc procedure.. almost cant go wrong.

And yep the other way (to bending the brass tab away) if u want to race and disconnect speedo all together is a 1K5-2K resistor completeing the organge/black wire circuit going into rear of Speedo.... Ahjahah and yes - Oldfart taught me this then forgot himself hey!

[Teflon]

Try and source a 'black box'.

I brought mine for about $30. Plugs into the CDI unit.

[DEATH_INC.]

You don't need the resistor,Ive done a couple,and a jap spec 750 just by cutting and joining a couple of wires,can't remember the colours off the top of my head,but can find out if you're keen...

[Kwaka-Kid]

with the NC35 at least you cetainly need the resistor... and its the orange/black wire behind the speedo... the ECU is measured to cut out if the circuit is broken... or revv to only 5,500rpm then stops firing if it gets a voltage reading of 12V... i tested this over and over.. just to make sure :P and its falled apart and ive tried straight short circuiting on side of track and it still dont work.. it needs X voltage to run proper, and thats the resistor thats inside the speedo unit... and NC30 is the same im sure, although i havnt done the trying over and over... As for blackbox's... yep i have an M MAX box right here... all they are is a big, easy, plug in resistor... measured resistance is about 2k2... anywhere between 1k5 and 2k5 i think did actually work... never undersood why M MAX box was 2k2 when resistance across speedo was 1k5... anyway.. too techie.

[DEATH_INC.]

Na,on bart's 30 we snipped the wires back by the ignitor and ran one from one to the other.....there's a third wire in there too,but it's only an earth...I found this by running the thing with the optical switch out of the speedo and placing something in there to see what happened.....12v with nothing in and 0ish with the beam blocked....I'll see if the 750 loom has the colours(same as the 30)

[Kwaka-Kid]

k :S crap mybad.

dont know anything on the 750's but do they use the same loom as the 30 u sayin?

i know that if u just join the wires together @ teh speedo unit, it dont work for sure. must have resistor.... so i dont fully get it? as surely they would be derived from back @ ignitor?