Sorry to bring up a forever on going topic but i just want a final calcification before i begin the derestricion. i have a H1 1989.
so from what i read it is not abnormal that 110Mph is the common top speed of a restricted H1.
so to de restrict this i must add some resistors to the CDi and ignition wires, and/or remove the small tab in the speedo. so:
Do i have to do both or only one?
the tab is fine there is a well in-depth guide on this site however the resistors is not so clear, from what i read i need to cut the pink wire going to the CDI and attach a 10Kohm (1 wat ) resistor going from the CDI through the resistor and to earth?
i also need to cut the grey wire going to the ignition and insert a 100 ohm ( 1 Watt) resistor to 12v +
is this correct? and do i need to do both the wiring mods and the speedo tab or just one?
Sorry for bringing up an old topic but i want some calcification, many thanks.
Zxr 400 H1 De-Restriction
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Re: Zxr 400 H1 De-Restriction
thats correct, the ignition mod is only for L model bikes though, you only need to modify the pink wire for the H.joeowan wrote:from what i read i need to cut the pink wire going to the CDI and attach a 10Kohm (1 wat ) resistor going from the CDI through the resistor and to earth?
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said
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Re: Zxr 400 H1 De-Restriction
Brilliant thank you very much!
Do i also need to take the plate out of the speedo? or does the wiring mod discard the need for this?
cheers
Do i also need to take the plate out of the speedo? or does the wiring mod discard the need for this?
cheers
- banner001
- Track day God
- Posts: 2589
- Joined: Sat Sep 24, 2011 3:27 pm
- My Bike: ZXR400 L4
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Re: Zxr 400 H1 De-Restriction
The wiring mod fools the cd I into thinking you never hit the speed limit so no need to remove the tab.
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said
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- Posts: 4
- Joined: Mon Sep 22, 2014 6:47 pm
- My Bike: ZXR 400 H1
Re: Zxr 400 H1 De-Restriction
Brilliant, thank you.