2 Strokes Down Under

I'm looking for a good PGM3 or alternatively some ideas on testing same. My bike has very weak spark on no.1 cylinder & none on no.2. I've tested all other components, swapped coils & pulse generators, new plugs & battery, and traced wiring without any success. I'm thinking the PGM is st...

On the stock set up , it will need all 4 lobes to send signals to the pgm . There could be a problem with the pgm sending the signal to the spark plug . Give me a shout if you need a pgm3 , my mate may have a spare one and I could pass on his details to you . Thanks for this info and apologies for ...

I've been thinking more on this topic. If, as you say, it only takes one lobe to trigger both plugs in turn, and mine only has one plug firing, I'm leaning on the UCU (pgm as you call it) being cooked. I'll try and get another one just to check it. Thanks to you all for your advice and comments, I'l...

Thanks for that. Anyone confirm which lobes to cut off? Where can I get a zeeltronic or ignitech and which is best?

Ok, tell me which lobes to grind off. There are 4 lobes, one by the F/T marks, then a gap, then the next two line up with both pulse gens, then a gap to the last one.

Well, still seems strange to me! I'm still considering the pulse gen gap or computer. If I grind off the lobes and still have no spark on that pot where to next? NSR World might be the go if that's their specialty, someone might have further info. They might have wankers in their membership but then...

I think I'll forget the ignitech and grinding off a lobe makes no sense at all, if that was what Honda intended they would have deleted it. Anyway, that would isolate that cylinder completely and a one lunger is crazy! There is some voltage from that sensor on crank but I'm thinking the air gap is j...

Thanks for the replies and advice, much appreciated. Regarding filing out the holes in the non firing pulse gen, I'm wondering if the Honda setup is similar to some of the Mitsubishi Lancers where the ECU relies on the first fire-up to energize the other pots. Should this be the case I'd be a bit co...

Thanks for your reply. I've installed a new battery and been through all electrical connections from the pulse generators to the coils, ignition and run/off switch and all connections at the ECU (computer). As I mentioned, the bike was left in the weather (without fairing) for a few years and as som...

My newly acquired MC21 front fork seals are leaking and before I strip the forks does anyone know where I can buy new seals?
Thanks.

I have just acquired an MC21 that has no spark on the uppermost cylinder. I have checked wiring and swapped coils and swapped pulse generators (the sensors at the flywheel) and both work on the front (lower) cylinder. I'm a bit confused that the lower pulse generator (front cylinder) air gap is .012...