Disabling the 3TJ restrictor

[tiptop]

so a different CDI unit will fully de-restricted the bike then???

[Evilchicken0]

There's only the one restriction and it's a speed restriction. You get up to 180kmh (112mph) and it cuts a cylinder .. well I think it fires every other power stroke. Although a different CDI will stop that they're pricey and of course you have to find them.

[nry]

Here's the ways to derestrict in order of ease / cost.

The restriction needs to be reset at 0kmh each time the bike is started up or it will restrict to 12,500 rpm in every gear. The speedo also needs to register a speed or again it will restrict to 12,500 in every gear - remember that when you take it to a dyno.

Road bike - KMH to MPH mechanical converter.
Pushes the restriction to 180mph effectively removing it. Your speedo reads in mph, which is a bonus but the sweep of the needle is reduced.

Road Race bike - M-Max (or similar) derestriction box.
Plugs into the loom where the speedo restriction wires go (behind the speedo). This disables the restriction. I've heard of them plugging in under the saddle too.

4DX CDI - the official or european spec CDI had no restriction. Some 3TJ2 SP's were also imported and deresticted and all the 2TK 1WG's are unrestricted as they're built before 1988

Deresticted CDI 1WG - I've seen them on e-bay from the far east I don't know if they work.

BDK CDI - Full race CDI with slightly revised ignition map. Expensive but should work well with the other BDK mods

You forgot the "ask Neil to do it" way.

[Evilchicken0]

Ah yes the Niel way ... about £60 and he'll mollest your CDI for you

[plodder]

Right. I've finally got round to taking the front fairing off and there's a M-MAX box sitting there in all connected up.

So I took it off, went for a spin (to the drag strip obviously) and my God what a horrible thing that restrictor is. The bike was lurching and bucking at 108mph (as measured on my sat-nav).

So it can't have been restricted all along and it's just my perception that it's a bit slow after getting off the FZR1000.

Happy Days.

So the way to tell if it is restricted is that it will lurch horribly when the speedo gets to 180kph.