Author Topic: Derestricting (copied from the old website)  (Read 1606 times)

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Offline CRuSHeR

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Derestricting (copied from the old website)
« on: June 02, 2019, 16:54:58 PM »
The restrictor is fitted within the speedometer, after removal of the speedometer cover you will find a thin circular disc which is driven by a magnetic field produced when the cable drive turns. (the faster the drive rotates the further round the disc moves.) On the disc are 2 high spots, the first causes the red light to come on at 95kph when it passes between a small circuit board. As speed is increased the second high spot comes into a position between what looks like two transistors, that is the speed regulator. All you need to do is to slice this second high spot off the disc as cleanly as possible keeping the uniform circular shape of the disc. The disc is very thin so it can be done with a pair of sharp scissors - taking care not to distort the disc or leave any burrs on the edge - the speedo can then be re-assembled and your 'Hurricane' is up to full power.</p>

The de-restricting info above was sent to me by Jeremy, thanx again buddy.
Gear up and start riding now, biking is fun and a horse aint no cow.

Offline Bill

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Re: Derestricting (copied from the old website)
« Reply #1 on: June 13, 2019, 09:00:12 AM »
Hi with not knowing the internals of the 750 speedo ,how different is the de-restriction compared to the CBR400 de-restriction as shown in this video.Does it act as a potentiometer like the 400
https://www.youtube.com/watch?v=ah5IVYg5jHg
« Last Edit: June 13, 2019, 10:07:41 AM by Bill »

Offline robvangulik

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Re: Derestricting (copied from the old website)
« Reply #2 on: June 13, 2019, 12:22:20 PM »
I'm afraid it looks a bit different, although that vid isn't very clear (or professional winky5a ).
The dash is quite easy to take apart, and when you do and read the description above it should be evident what to do.
And use the right tools, those aren't phillips screws but JIS, japanese industrial standard, and when you use a JIS screwdriver you'll never ruïn a screwhead again!

Offline Bill

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Re: Derestricting (copied from the old website)
« Reply #3 on: June 13, 2019, 12:46:54 PM »
Cheers Rob winky5a

Offline Bill

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Re: Derestricting (copied from the old website)
« Reply #4 on: June 16, 2019, 11:01:10 AM »
Looking at resolving the Speed warning ,with a 2K resistor between the Green/White and the Black/Brown wires at the clocks,and both Green and Brown/Red bullet connectors uncoupled. Black/Brown still has a feed to Instrument bulbs.Bill

Offline robvangulik

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Re: Derestricting (copied from the old website)
« Reply #5 on: June 16, 2019, 15:19:09 PM »
With speed warning you mean the little red light?
Easiest way is to take the bulb out :winknudge:

Offline Bill

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Re: Derestricting (copied from the old website)
« Reply #6 on: June 16, 2019, 15:31:27 PM »
Sorry Rob ,mean the restriction ,pulling the Bullet connector on the Brown/Red wire will take care of the Red Light

Offline xpd153

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Re: Derestricting (copied from the old website)
« Reply #7 on: July 03, 2019, 13:34:39 PM »
There is another solution. Replacing the entire gauge with SC21 gauge.  SC21 gauge does not have speed warning indicator and restrictor and is pin compatible. However, you may need calibration of speed indicator due to different tire size.

Offline BERTYE

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Re: Derestricting (copied from the old website)
« Reply #8 on: April 20, 2020, 20:02:53 PM »
Hi, I done mine in 2001. But here are a couple of pictures of the circuit board. It is a case of opening up the display head. Take the screws out that hold the board in (pictures). Plug it back in whist the board on the outside of the unit and seal it with a bag so water does not get on it. This way, there is now red light coming on and it cane be put back to standard.
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