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30-11-2020, 04:57 PM | #1 |
Bronze Member
Join Date: May 2003
Location: Sherbourne
Bike: M600
Posts: 401
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M600 voltage question
Hi folks,
Just fitted a volt meter on my M600, as I suspect it's over-charging. It's reading around 13.7-13.8V while idling, and 15.0-15.3V while riding. Mostly bang on 15.0, in fact. My feeling is it shouldn't really be higher than about 14.5V or thereabouts. What's the general consensus? I'm going to assume the regulator is probably duff, or failing, but wanted to check the collective wisdom before ordering a replacement. Thanks in advance! Nik |
30-11-2020, 05:05 PM | #2 |
Ciao, come stai?
Join Date: Apr 2003
Location: Somewhere
Bike: Multiple Monsters
Posts: 4,158
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Reg rect gone duff mate!
I think 14.2v should be the max Did the bike come with warranty? Lol!
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01-12-2020, 10:49 AM | #3 |
Registered User
Join Date: Jun 2018
Location: Clevedon
Bike: M1200s
Posts: 565
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Make sure your new voltmeter is accurate before spending cash on a new rectumfryer.
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Keep the rubber side down. Mick |
01-12-2020, 01:24 PM | #4 |
Registered User
Join Date: Aug 2011
Location: Southampton
Bike: M1100evo
Posts: 2,465
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A good point from mjgt. I recently bought a cheap digital voltage meter that plugs into the car's cigar lighter. I checked it against a multimeter and it consistently under-reads by 0.5 - 0.6v. Not a problem now I know, but I might have been worried if I hadn't checked it first.
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01-12-2020, 04:10 PM | #5 |
Registered User
Join Date: Sep 2013
Location: Glasgow
Bike: S4 challenge
Posts: 447
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If buying a new Reg/Rect proceed with caution. Lots of fakes on Ebay. I bought one from Electrex and it went on fire......ended up going down the MOSFET route and no problems ever since. Lots of info on here.
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02-12-2020, 12:57 PM | #6 |
Bronze Member
Join Date: May 2003
Location: Sherbourne
Bike: M600
Posts: 401
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Thanks for the replies gents. I seem to have notifications turned off, so hadn't realised I'd so many responses!
The voltage meter is a cheap one off ebay, so not expecting it to be mega accurate, but I'll verify it by borrowing a multimeter from work. Or attaching it to my Multistrada, and see what it reads on there (as that has an onboard voltmeter, which ought to be fairly accurate). I've seen lots of inexpensive Reg/Recs on ebay, but I'm guessing this would be a good bet... https://www.electrexworld.co.uk/cgi-...2ehtml#SID=439 |
02-12-2020, 01:01 PM | #7 |
Bronze Member
Join Date: May 2003
Location: Sherbourne
Bike: M600
Posts: 401
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02-12-2020, 02:23 PM | #8 | |
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Join Date: Jul 2003
Location: East London
Bike: Multiple Monsters
Posts: 9,733
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Quote:
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03-12-2020, 04:16 PM | #9 |
Old Git
Join Date: May 2006
Location: Cricklade
Bike: Multiple Monsters
Posts: 2,897
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Thats a Fake it is likely to burn out really quick,, I tried a few cheap chinese ones like that all duds
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MONSTERMAN |
03-12-2020, 08:22 PM | #10 |
Registered User
Join Date: Mar 2010
Location: Beachtown
Bike: M900
Posts: 2,188
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Both the genuine factory and Haynes manuals quote that at 3000rpm the voltage output of the single phase alternator should be between 13.5 to 15.5v
As others have said, I would be checking all the connections along the wiring but like a lot of the wiring on the early bikes it is another case of it being undersized for carrying the intended current.
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04-12-2020, 05:18 PM | #11 |
aka Phil
Join Date: Nov 2005
Location: derry
Bike: M900
Posts: 376
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Nik, just wondering why you think it was over charging in the first place that made you want to fit the meter, and what is it reading when the engine's stopped i.e. the static battery voltage?
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05-12-2020, 11:13 AM | #12 |
Bronze Member
Join Date: May 2003
Location: Sherbourne
Bike: M600
Posts: 401
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Having owned an M600 years ago where the RR went pop, and the previous owner (Pedro!) having been suspicious that it might be over-charging, I wanted to check it out.
Looked at it yesterday, having sat in the garage untouched for 24hrs, and it was reading 12.2v (with ignition off). Battery was new in Feb when I recommissioned the bike. |
05-12-2020, 11:16 AM | #13 |
Bronze Member
Join Date: May 2003
Location: Sherbourne
Bike: M600
Posts: 401
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I should add that when I went over the bike in Feb/March I cleaned all the connectors, so everything should be a in pretty good shape.
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05-12-2020, 12:15 PM | #14 | |
Registered User
Join Date: Mar 2010
Location: Beachtown
Bike: M900
Posts: 2,188
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Quote:
Then I would be doing a ‘drop test’ on the battery to check its load capacity is ok - just because it’s showing normal (or close to normal) voltage it doesn’t mean it’s any good. Along with properly checking the battery capacity, I’d do an earth leakage test to make sure you have no residual current drain in the circuit. If the above don’t show anything untoward then personally I would go back through the connections and also get a meter to check out the Alternator and RR measurements.
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05-12-2020, 10:20 PM | #15 | |
aka Phil
Join Date: Nov 2005
Location: derry
Bike: M900
Posts: 376
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Quote:
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Tags |
regulator, voltage |
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