I have a query that I'm hoping the forum can shed some light. I'm looking at the pro's and con's of derestricting the MC28 and having been speaking to one of the members on here about when he had both the standard pgm card and a card that had been coded to hrc 030. He says that he didn't need to do a wire splice to make the hrc card work. He simply put the standard and hrc cards into the pgm and it knew which one was which. With the hrc card in his speedo changed but he doesn't remem. ber losing any of his warning lights etc that I'm led to understand if I bike is wire spliced. He rode the bike bike up and down the road with the hrc card just to make sure it worked etc. He too was thinking of doing the mod's to the bike but refrained and sold the pgm on with both cards instead.
So my point is.. has anyone else had a card changed to hrc spec and been able to keep the road harness and warning lights etc.. if so did it provide the same performance gain and was the expense deemed worth it?
Cheers Guys.
Regards graham.
As far as I know (Might be wrong), even if you reprogram a road card/PGM to HRC spec your speedo will still not work and the PGM won't count the mileage covered while using the "HRC" card.
Same goes for the lights etc. You will have to splice the standard harness to keep them running with the "HRC" card.
As far as the "HRC" card is concerned the lights and speedo is not there...
I'm having similar thoughts about it as I have a track bike with HRC PGM and card but maybe want to change it back to a road going bike. My problem is the speedo and even more so the trip meter !
I think the only other option would be to use the HRC card and PGM with a spliced road harness to keep the lights etc. And then have another speedo/trip counter installed somewhere in the cockpit...
Hope this helps, and if you find another way around this please let me know !
It's an interesting debate. I was always of the same opinion as you.
To clarify re the pgm itself. Do you have to have the unit amended to hrc or just the card? As I was under the impression that the unit has the various ignition mapping within it but it's the card itself that tells the pgm what map to run.
I may be mistaken though. I've been advised by another source that in order to run the hrc card you have to splice a standard harness or run the hrc harness which then means that you don't have the neutral, warning lights etc.
So when Richard who I'm buying a spare standard pgm and card from said that when he had an MC28 he was sure his bike hadn't been spliced and when he bought a pgm from Drew in Japan that came with both the standard and hrc card the bike ran ok all be it with normal clocks using the standard card and temp gauge when hrc. I may be wrong but I thought the hrc card wouldn't allow the bike to run at all unless a standard harness is spliced.
He's not back from holiday for another week or so to clarify things. But if it's possible it would be great. And who does it? As to be honest we'd all give the hrc card a go for the buzz, but not so keen on splicing a loom and permanently lose the standard lights and warnings etc.
Does anyone have any experience of having played with pgms and cards and whether the cost of sorting this out is worth it in performance gain etc.
Cheers
The HRC card will not run with a standard harness. You must use an HRC harness, or splice the stock one.
If you splice a stock harness, both the HRC and standard card will work, but they run very differently, so it's not a simple case of use whichever one you want. The jetting requirements tend to be significantly different between STD and HRC.
Splicing the harness retains lights and indicators [turn signals] but disables some of the warning lights and side-stand switch. No-one I know of can confirm if splicing the harness effects the operation of the solenoid on the oil pump.
So that's probably where the confusion lies. With an OEM spliced harness, you can run either card. The speedo [odometer] works with the STD card, but converts to a temperature gauge when the HRC card is inserted. The head/tail/brake lights work with either card.
As for whether it's worth it? Only you can decide. If you're happy to have a pin sharp 250 2-stroke neutered to around 2/3 of its power potential at the rear wheel, then run a standard card! However, if a concours bike is your goal, then you don't want to be cutting into an expensive wiring harness.
Ride an NSR250 with 60hp once though, and you won't want 40hp again! (I'd never even want 60hp again! ) _________________ Andy.
NSR-WORLD.COM
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Cheers Andy. That is what I thought to be the case. Richard must have had a spliced harness then and didn't realise it. I am tempted to try the lighter flywheel, expansion pipes and jetting first to see what low 50's hp feels like. Then if I'm still curious to see what extra may be available hrc card wise what more would I have to consider? As by that time I'd have already jetted up. From what you say Andy I'm guessing the ignition curve will be stronger with the Hrc card and the improvement will be quite noticeable.
My plan is to try and get pipes, jets and flywheel between now and winter and see how that feels.
If I still want to take it a step further I'd pick up a spare harnes to splice if I go that far.. as for the pgm unit am I right in saying that I'd only need a card coded to my pgm? So have Drew get me one and code it etc. Or would I have to send the pgm and standard card off too?
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