2 wire regulator with 3 wire alternator?

[jerry]

Originally Posted by DaveR

I’ve been having a few electrical & starting issues recently, finally pin- pointed as a fried regulator/ rectifier. I have sourced a mosfed type from eBay, but it’s taking a while to turn up. In the meantime I have ‘borrowed’ the one from my 900ss ‘project’ (where project means in bits in the garage & has been for 2 years).
The one off the 900 has only 2 wires, whilst the S4R has a three wire alternator. My question is will I be doing any damage running the bike using this set up, I am seeing 14.3V at the battery with the engine running
Dave

Many of the MOSFET ones on EBAY from china that are cheap are fakes and a shunt types and burn easily ,, beware genuine ones for Ducati, triumphs or yamaha R1 R6 are always about £100 shindengren is the make

[DaveR]

Thanks for the info & advice which I intend to follow, ie not use my bike until the replacement arrives. I have had a tracking link that shows that after visiting 4 US states it has finally left for the UK. Due to me by Friday🤞🏼
Jerry I had seen that, this one cost around £100, is secondhand, hope it works.
Dave

[alan s4]

Mine came from a Yamaha R1. I also relocated under the seat on the S4, I needn't have bothered as it is only slightly warm to the touch with the bike running. The old one would set your pants on fire it got so hot!

[Darren69]

Originally Posted by DaveR

Thanks for the info & advice which I intend to follow, ie not use my bike until the replacement arrives. I have had a tracking link that shows that after visiting 4 US states it has finally left for the UK. Due to me by Friday🤞🏼
Jerry I had seen that, this one cost around £100, is secondhand, hope it works.
Dave

£100 for a s/hand one? Jeez you should have said I have a spare 3 wire one which I think would be ok for £30, not tested but fairly easy to do a diode test which would prove it could be potentially ok.

I have a couple of 3 wire ones and a 2 wire one which I am keeping as a backup but I have a 3 wire spare one for what it cost me. I know it's a gamble but hey ho?