Right then;

The mc28 is restricted in 2 places;
1; The exhuast headers have large washers in to restrict the flow of exhaust gasses.
2; The ignition advance curve is more retarded than previous NSRs were.
and like all NSR's the airbox is too small to flow enough air for max power.

"1" is easily fixed, new pipes or grind the washers out.

"2" is fixed with a different "smartcard"*;

There were four commonly available HRC cards;

the "000" card was the original and for use with Avgas.
the "010" card was the updated "000" card.
the "020" card arrived with the "010" card and was for wet weather, both where for Avgas.
the "030" card was for normal unleaded pump fuel.

HRC no longer make these cards and they are individually code to the CDI so unless someone in Japan has contacts who say otherwise they are no longer available new.

None the HRC cards work if there is any signal from the sidestand, oil level indicator or neutral switch.
This means you either need to use the HRC wireing harness which means no road kit at all (no lights of any form, no steering lock) or modify the stock loom to cut those signals out.
The HRC card also turns the speedo into a big temperature gauge and removes all other LCD display functions.

Contrary to popular rumour the stock card does work still with either the race loom or a modified road loom. But as the HRC card makes large changes to the ignition advance the jetting on the bike will need changing so you can't swap one card to the other easily.
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Last edited by fontyyy on Thu Jan 08, 2009 6:30 pm; edited 1 time in total