derestriction query

[quality]

Hi guys, i have just bought a nice nc30 for road and track use but am unsure how to tell if is derestricted or not. The speedo has been converted to mph with a small unit behind the clocks but thats it as far as i can tell. I ran it at cadwell could get to around 110 before running out of track but wasn' revving out,plenty left. Annything you could advise to check so i know if it is derestricted or not would be great and any idea what top speed can be expected after derestriction? Also best way to derestrict if needed?
Cheers, paul.

[Yakama]

If it has a moh converter then that derestricts it as it will never get to the point on the speedo where the restriction kicks in. You should expect 125-130 mph from it

[quality]

Cheers Pal,

I've seen threads on here about m-max boxes. Would you use this instead if the speedo conversion wasn't done?

Paul.

[Neosophist]

Cheers Pal,

I've seen threads on here about m-max boxes. Would you use this instead if the speedo conversion wasn't done?

Paul.

Yes you'd connect one of these if you remove the speedo or don't convert it.

Theres a mechanical sensor inside the speedo that is triggered when the speedo needle is around the 180km/h mark

[Jashdown]

I know this is for the NC30, but what happens on the 35 if you remove the speedo cable completely? Will the bike still run, apart from the speedo not doing anything? There's not restriction on the 35's as far as I'm aware either.

Sorry for the hijack.

[ludacris]

35s are speed restricted. removing the speedo cable or stock gauges triggers the "limp home mode"

[Neosophist]

I know this is for the NC30, but what happens on the 35 if you remove the speedo cable completely? Will the bike still run, apart from the speedo not doing anything? There's not restriction on the 35's as far as I'm aware either.

Sorry for the hijack.

The speedo cable isn't the issue, if you remove that the clocks will just stay at 0 and the bike wil run to maximum speed.

The speedo sensor is a little ciruit board in the clocks.

It's triggered when the speedo needle is at 180km/h mark.

You can't just disconnect it though as the igntion box checks it is connected, if it isn't there the bike wont rev over 5500 rpm.

So to get around it.

You can do one of the following.

1. disconnect speedo drive cable.. you'll have no speedo but no restriction as the clocks cant hit 180kmh

2. fit an m-max box or equivalent.. these boxes allow you to disconnect the plug at the back of the speedo and replace it with an aftermarket box to de-restrict it.

3. fit an mph convertor.. these change the dial to read in mph.. since 180km/h now is 180mph the bike will never reach that speed and never be restricted.

4. disconnect the speedo sensor board and fit a resistor (2-2.2kohm) that will fool the ignition box into believe the sensor is still fitted.. it wont trigger though.

5. open the speedo by removing the screws... locate the small metal disc that 'triggers' the speedo and pop it off with a small screwdriver (it's only held on by two spot welds)

5 is my favourite option as you cannot tell without opening the speedo or running it past 180kmh

[Jashdown]

The speedo cable isn't the issue, if you remove that the clocks will just stay at 0 and the bike wil run to maximum speed.

The speedo sensor is a little ciruit board in the clocks.

It's triggered when the speedo needle is at 180km/h mark.

You can't just disconnect it though as the igntion box checks it is connected, if it isn't there the bike wont rev over 5500 rpm.

So to get around it.

You can do one of the following.

1. disconnect speedo drive cable.. you'll have no speedo but no restriction as the clocks cant hit 180kmh

2. fit an m-max box or equivalent.. these boxes allow you to disconnect the plug at the back of the speedo and replace it with an aftermarket box to de-restrict it.

3. fit an mph convertor.. these change the dial to read in mph.. since 180km/h now is 180mph the bike will never reach that speed and never be restricted.

4. disconnect the speedo sensor board and fit a resistor (2-2.2kohm) that will fool the ignition box into believe the sensor is still fitted.. it wont trigger though.

5. open the speedo by removing the screws... locate the small metal disc that 'triggers' the speedo and pop it off with a small screwdriver (it's only held on by two spot welds)

5 is my favourite option as you cannot tell without opening the speedo or running it past 180kmh

My bike isn't restricted. I've had the needle top out the speedo, went well past the 190km/h mark and the revs kept increasing.

So if I just completely remove the speedo cable from the bike, the bike will still run as normal, my speedo will just read 0 all the time and the odometer won't change?

With number 5, does the speedo still operate or not?

[Neosophist]

Then it's probably already been modified and hence de-restricted.

The speedo still works in my option 5.

If you remove the speedo and take it apart by removing all the screws (don't forget the one in the trip-reset knob, it's quite small)

As you turn the speedo needle around theres usually a half moon shaped metal disc attached to the wheel that the needle turns.. at 180km/h this half moon shaped piece of metal comes into contact with the optical sensors on the speedo board and trigger the limiter.

You can either remove the optical sensor (check your circuit board for cuts etc) or the easiest is to 'pop' the half moon shaped disc off.

You will probably find it isn't there on your bike



This is what the restrictor disc looks like.. you can see the 3 spaces it's tacked on with.

http://imageshack.us/photo/my-images/263/87181025.jpg

you can see the wheel it's usually attached to in the picture above...