It's common for the guys to suggest swapping over ignition coils later models where an intermittent spark becomes an issue, and most often the first thing suggested is to swap CDI packs on the MC16 when such problems arise, too.

Your post was most likely skimmed and misread, Terry. It wasn't the easiest of posts to read, hence why I not only added the English URL, but also broke the single paragraph up into something easier on the eye!

Physically swapping the CDI packs naturally eliminates them from the equation if the problem remains; the MC16 guys usually then move on and do the same thing with the coils. (You've already stated it has a new battery, the carbs have been cleaned etc., else those things would've been high on the list of "to-do's".)

Without digging into the manual, which I don't have to hand (plus it's 5am and I'm not going routing around for it at this hour!) I can't remember off-hand if the the MC16 fires both coils at once (like the old Yamaha parallel LC's did I believe), so purely swapping the connectors may not actually have the effect you are expecting. The good spark may indeed "move" to the other cylinder, and without load look OK, but once the plugs are refitted and the motor run it may be badly timed and consequently once again result in poor running. The NSR isn't exactly known for it's retina-burning spark at the plugs in daylight, so I wouldn't personally just rely on it "looking good" when swapping connectors! I would do as 2Smoke suggests, and physically swap the CDI packs over and then see what happens.

If swapping the CDI's has no effect, then before looking for meter readings from the pulsers, check the physical condition of their wiring. I've seen plenty of freyed pulser coil wires, on all models of NSR. It's not a common fault per se, but failed pulser coils have been reported a few times in recent years, however I don't recall anyone who's come back and said they had ascertained it was actually a faulty coil. I personally suspect the corrosion or chaffing of the pulser wiring in most cases where the CDIs and ignition coils have been found to be good.

I seem to recall an instance too recently where corrosion or dirt either on the flywheel or the bottom of a pickup was causing problems too.

I trust you have good compression on both cylinders?

*If any of that's waffle it's because it's now 5:30am and I should be tucked up in bed!
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Andy.
NSR-WORLD.COM

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