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 Post subject: Regulator/rectifier
PostPosted: January 11th, 2018, 11:25 am 
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Joined: January 26th, 2006, 4:47 pm
Posts: 247
Location: Cardiff , South Wales
Hi all.

My '87 Transalp has just suffered another suspected reg/rec failure. A cheap pattern one lasted around two years for about £40 and a dearer pattern one lasted around two years for about £110.

the Honda part number is 31600MM9000.

Does anyone have any ideas of any alternative reg/recs that will fit?

Thanks all.

Neil.

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 Post subject: Re: Regulator/rectifier
PostPosted: January 12th, 2018, 5:17 pm 
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Joined: July 14th, 2014, 4:55 pm
Posts: 444
Location: California USA
I think you need to look for a problem somewhere else. Are you running extra lights? The VR seldom quits from what I've seen. Is it not charging or is it burning the wire connectors?

If you're willing to do some wire splicing and mounting mods, the Mosfet Regulator is the way to go.

http://www.roadstercycle.com/

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89 Transalp XL600V X3, 01 Goldwing GL1800, 99 Varadero XL1000V
05 CRF450X Plated, 01 XR650L, 84 Passport C70


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 Post subject: Re: Regulator/rectifier
PostPosted: January 12th, 2018, 5:34 pm 
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Joined: July 14th, 2014, 4:55 pm
Posts: 444
Location: California USA
I just found this on Roadstercycle.com and thought it was interesting.

Quote:
What is a balanced charging system?

A balanced charging system is when the manufacturer designs lets say 25 amp charging system and the bike uses 20 to 22 amps of it to run the bike and charge the battery. The R/R only needs to get rid of 3 or so amps, so it is happy. Now if you take that same bike and run led taillights and marker lights and maybe some led headlights now your making the R/R get rid of lets say 10 amps, now its working hard and getting hot. Although it seems like your doing your bike a favor by thinking it's going to charge your battery better your actually slowly killing your R/R. Not to mention if you unplug your headlights for track days. Wow!!!!

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Ride Now, Work Later!

89 Transalp XL600V X3, 01 Goldwing GL1800, 99 Varadero XL1000V
05 CRF450X Plated, 01 XR650L, 84 Passport C70


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 Post subject: Re: Regulator/rectifier
PostPosted: January 12th, 2018, 5:42 pm 
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Joined: January 26th, 2006, 4:47 pm
Posts: 247
Location: Cardiff , South Wales
Hi Skylines and thanks for the reply.

All the wiring and connections are all sound, it's just not charging properly.
The only addition to the bike is Oxford heated grips. The reg/rec which has just failed is an Electrex World unit which, being 2 years old, is out of warranty.

I spoke with them today and they've asked me to send it back to be tested so I'm hoping they'll take pity on me and knock a few pennies off the replacement I'll have to buy.

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 Post subject: Re: Regulator/rectifier
PostPosted: January 15th, 2018, 6:10 am 
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Joined: July 8th, 2011, 7:02 am
Posts: 1114
Location: Mackay, Queensland, Australia
I have had no trouble with the original reg/rec on my '03 650. It has now done about 165,000km and the only mod I made was to run an earth lead fromthe mounting screw direct to the battery negative after reading that they have a habit of failing due to poor earth connection as the mounting point ages and corrodes, requiring the rec/reg to have to output more current to make the circuit which in turn overloads it, causing it to overheat and burn out.
I hope this helps.

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2003 Honda XL650V Transalp; 1977 Kawasaki Z750B twin;
2006 Hyosung GT250R; 2001 Yamaha FZS1000.


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 Post subject: Re: Regulator/rectifier
PostPosted: January 25th, 2018, 1:49 pm 
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Joined: January 26th, 2006, 4:47 pm
Posts: 247
Location: Cardiff , South Wales
Hi again all.

I sent the reg/rec back to ElectrexWorld and they confirmed it was dud so £94 later I've got a new one and a properly charging battery.

I seem to remember somewhere in the dim and distant past a chap who fitted a small computer fan on his reg/rec to keep it cool with the idea of it lasting longer.

Any thoughts on this??

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 Post subject: Re: Regulator/rectifier
PostPosted: January 25th, 2018, 4:07 pm 
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Joined: July 14th, 2014, 4:55 pm
Posts: 444
Location: California USA
The Regulator is something that rarely goes bad. What normally happens is the connections get dirty and causes things to heat up and melts the plastic around the connections causing them to touch and short out and then burn something else up. This is a big problem on the early Goldwings, but not so much on Transalps.

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Ride Now, Work Later!

89 Transalp XL600V X3, 01 Goldwing GL1800, 99 Varadero XL1000V
05 CRF450X Plated, 01 XR650L, 84 Passport C70


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 Post subject: Re: Regulator/rectifier
PostPosted: January 27th, 2018, 10:55 pm 
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Joined: July 8th, 2011, 7:02 am
Posts: 1114
Location: Mackay, Queensland, Australia
What Skyliner said above will be a first hand version of what I have read about the issue. My advice is still to run an earth wire directly from the mounting screw of the rec/reg to the battery negative, which overcomes the issue of dirty or corroded connections causing things to overheat, melt and short out as Skyliner described. Checking all pins are a shiny gold colour, rather than dull brown, in both male and female connectors for the rec/reg is a good place to start.
A fan sounds like a great idea, but rec/regs are dezigned to dissipate the heat they generate during normal operation in with good, new connections so if you have clean and direct connections when you install the new one, you should never have an issue with overheating.

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Born to be MILD
2003 Honda XL650V Transalp; 1977 Kawasaki Z750B twin;
2006 Hyosung GT250R; 2001 Yamaha FZS1000.


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