Colin NSR wrote:My '28 has fully functioning clocks etc. so the splice has not been done - RIGHT?

Running original Card Key.

That's right, you lose the oil light and neutral warnings (actually they are always there but you still lose their function) with the splice as it involves shorting those leads to earth but there is no reason to do the splice other than to allow the HRC card to function, the card does not work with a standard unspliced loom and the splice has no effect with the normal card other than to render the low oil and neutral indicators useless.

Then if you run the HRC card itself (contrary to popular belief the normal card still works) you lose everything except the main (speedo) display which is now a big temp gauge.

I am presuming here but I guess the HRC card advances the timing to the same sort of setting as the HRC '21 part #30490-NKD-840 does.

That there is no speed restiction or gear related tail off would make sense, it doesn't need it, 40odd bhp (which is all a standard '28 makes) would barely reach the 113mph the restriction is supposed to be. That and the standard '28 gearing is only doing about 115mph flat out anyway, mine was showing 117mph on a push bike speedo at well past 12000 rpm in 6th when it "nipped up".

So;

The cheapest '28 derestriction is just pipes (or a Dremel and a lot of patience on the '28 pipes), maybe a modded airbox and some bigger main jets, you might see mid 50's bhp.

Option 2 is the '21 flywheel and the above, Tyga got 57 bhp like this.

The "proper" way is pipes, airbox mod, HRC card and jetting to suit. Mine made 60.7 with ease at the dyno day and probably a couple more running a modded lid (I ran an open airbox at the dyno day) and slightly leaner jetting.

Then maybe the HRC head conversion, reeds, stuffers etc.....
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Last edited by fontyyy on Mon Jan 30, 2006 10:55 pm; edited 1 time in total