Hello

I have a 2009 GSXR 750 that has blew a reg/rectifier 2 days after fitting a power commander, I performed all the tests from the manual (all good) and then I fitted an electrosport aftermarket reg/rec and this died after 2 days as well.

So before I fit another RR I thought I would list all my test results here and see if anyone has any additional tests or ideas?


Aftermarket electric items = Power commander
Battery current leak = 2ma
Regulated voltage = N/A:- reg/rec blown
Generator coil resistance = 0.4 amps across all 3
Generator no-load performance = 85v@5000rpm, manuals specifies 65v+ is 85v to high?
I have also cleaned and checked the connectors in the charging system and they are all fine.

If anyone has anymore tests or ideas please post them.

Thanks in advance

Mark Nutley

If you don't have a full system exhaust then take the power commander off, replace the rectifier, and see how long it lasts... I have a bolt on exhaust on my 600 and I went out and bought a power commander but didn't see a whole lot of performance difference after mapping. It could be electrical, and I would start with the add on's first before looking at the key electrical components.

This is the only thing I can think of off the top of my head.