Hi All.

It's been a while since I've been here but I've been playing with my bike again. It's an MC21r. I've just replaced the crank, pistons etc. I rejetted for the mods (wire and gps splice and holes in the airbox) I've done and took the bike for a run. It ran fine (fairly rich but ok) for about 15 minutes then I went home for a rest. I went for another ride later and all was fine until I lost all power. I stopped the bike on the side of the road and waited for about 10 minutes. It started again but I noticed that every time I used the brakes, indicators or lights the bike would stall.

I figured that I will need to rejet as I may have fouled a plug or two but the whole electrical thing has got me stumped.

The battery was bought new today, so I'm not sure if that's faulty or not.

Just wondering if anyone has had this happen before or if there are any ideas on this fault?

Andy

Just checked the battery while running. Battery doesn't seem to be charging. I've got a new reg/rec installed so I might change out the ac generator.

Anyone know how to test the generator while the bike is running off battery power?

so how many volts are you getting off the battery when the bike is running? Does it vary a bit if you increase revs?

The battery that was in the bike when the problems started was down to about 6 volts by the time I tested it. I put in the old battery which had about 11.5 volts. When revving up to 7,000rpm there was no raise in volts, it only dropped slowly. When I used the lights (brake, indicator and headlight) the battery drained quite fast.

It certainly seems to be a charging problem but not yet sure if it's the generator,reg/rec or pgm (if the pgm plays a part in charging).

Any testing methods would be greatly appreciated.

Andy

Andy has the testing flowchart up here, but the first bet would be the reg/rec if the battery is not charging.

edit:

It is in the Workshop

Ignition fault finding chart

It appears to have gone missing though, so you can go to the original source

It's there... exactly where is says it is...

http://nsr-world.com/workshop/wiring/electrex-fault-finder/fault_finding.pdf

You must have an old bookmark, or be using and old browser/cache. I am updating the website and the Parts Manual at the moment, so make sure you clear out the cache to get the latest version of pages.
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Last edited by Andy on Sat Apr 14, 2012 9:42 am; edited 1 time in total

It sounds like the stator but first make sure there is nothing wrong with the modifications you did to the wiring loom.
If you've made the orange/blue wire splice then the GPS mod is not needed.

I believe that with the orange/ blue splice the stand switch and neutral switch will not function as well but make sure that there is not a short circuit in there.
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2t-racelab.com

All the wiring work I did, I used bullet connectors so I could change things back easily. I've swapped all connectors over so that the bike has standard wiring then went through the electrical flow chart. The stator was stuffed so I swapped that out for a known working one. The bike still wont charge the battery so I've ordered another reg/rec.

I'll let you know how I go with that.

Andy

Back again.

I got a different reg/rec from some auction site I stumbled across. The first new one I had was the type with the metal heat sink body. It was advertised as a compatible item for the nsr. This obviously was a dud or incorrectly advertised. The second one was delivered today and was the plastic body type which my bike originally came with.

As usual, the old girl fired up first kick. I quickly grabbed my multimeter to check the voltage at the battery and at idle I scored 14.3v. All other checks in the flow chart were spot on spec.

I guess in my case I was better off buying the original style reg/rec as opposed to the pretty heat sink one.

Case closed...

Thanks again for the help fellow nsr lovers.

Andy