NC30 GSXR rectifier

krisztian_andre · Post by **krisztian_andre** » Mon Jul 23, 2012 4:58 am

These look robust and are locally available where I live:

Do you think they'd be suitable for the vfr or would they fry the stator/battery?

magg · Post by **magg** » Mon Jul 23, 2012 7:53 am

They could fry the stator/battery if faulty. Why do you want to buy a rect/reg?

krisztian_andre · Post by **krisztian_andre** » Mon Jul 23, 2012 9:25 am

As an upgrade on the OEM part (I'm on my second rectifier).

Post by **CMSMJ1** » Mon Jul 23, 2012 9:45 am

Haven't we kind of decided that you need to check the generator? At least visually? If you are getting less power with revs then I would point the finger at a part of the 3 phase stator coils being at fault.

magg · Post by **magg** » Mon Jul 23, 2012 10:01 am

Why are you trying the replace the complete charging system when you have not identified a faulty component. You still have not provided the voltage reading at the output of the rect/reg. If you get 14 or more volts at the red and green wires on the rect/reg with the battery connected, then the charging system is working correctly.

If the 14 volts or more at the rect/reg output does not get to the battery it is not a charging system fault, it is a rect/reg to battery wiring issue.

krisztian_andre · Post by **krisztian_andre** » Mon Jul 23, 2012 1:09 pm

I'm sorry, I think you misunderstood. I measured the voltages again with a different better quality multimeter and I got 14V at the battery and 43V at the alternator @5000rpm and 12.8V on the battery with the bike not running so I concluded that the alternator is a bit weak but the rectifier and battery are good and that my previous loss of electrical power was due to an empty battery (bike stood for a month) and the dodgy wiring loom (rectifier connector was heavily corroded).
I am only asking if this rectifier would do as a spare, that's all magg.

krisztian_andre · Post by **krisztian_andre** » Mon Jul 23, 2012 1:11 pm

CMSMJ1 wrote:Haven't we kind of decided that you need to check the generator? At least visually? If you are getting less power with revs then I would point the finger at a part of the 3 phase stator coils being at fault.

Yes you're right my alternator is on the way out but hasn't failed yet, waiting for the generator gasket to have a look at it. I'm just looking for spare rectifier since my last one failed on me and the current one is of the same type.

magg · Post by **magg** » Mon Jul 23, 2012 2:36 pm

The doggy wiring at the rect/reg could easily cause the battery to be under-charged. The readings you have at 5000 rpm are typical of a good system, you do not need to replace anything. A fully charged battery only measures 12.8 volts. The only recommendation I would make is apply thermal transfer compound between the rect/reg and its chassis mount, and check all the charging system connections. Do not forget the one between the alternator output and the loom.

You make no mention now of the reduced voltage with increasing revs. If you still have this problem you need to measure the rect/reg output at the red and green wires and if the voltage at this point does NOT decrease with increasing rpm then you have an earthing issue. To fix this problem add a wire between the green rect/reg wire and the chassis.

NC30 GSXR rectifier

NC30 GSXR rectifier

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Re: NC30 GSXR rectifier