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Force-V4 Forum Index » RC45 Discussion » REG/REC units
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fogrider



Joined: 10 Feb 2016
Posts: 63
Location: East Yorkshire

  

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PostPosted: Tue Feb 26, 2019 2:22 pm    Post subject: REG/REC units  


I need a new unit, this is proving to be a problem - no originals and those I have seen for sale have 65mm centres for the screws, not 80mm like the original. OK, that can be got round, but I'm also told that units for the VFR750 are no good as they are carb fed bikes, got to be for an EFi bike, like the PGM F1.
I suggested a VFR800 Fix or later Blackbird would be OK, can't find anyone who agrees one of them would do.
So, for now, I'm stumped.
Anyone fitted a non original that has proved OK? Any comments will be very helpful.
Regards, Terry.
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Busy Little Shop
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PostPosted: Tue Feb 26, 2019 8:07 pm    Post subject:  


Terry... the notion that units for carbs are some how no good for F1 is on shaky ground...

I installed a Yamaha R1 Rec/Reg in place of the special MW4 high
dollar Rec/Reg... this was after I went through 2 stock R/Rs at $227
each and 1 $300 stator and still I suffered the problem of low volts
to the point where the engine would hesitate and quit... only after I
give up on Honda's stuff and tried Yamaha's stuff did I have the joy
of finishing my ride...

All though I haven't done it myself the VFR Rec/Reg part number is so close
it is worth a try...

98 VFR REC/REG 31600-MBG-305 $151.15
94 RC45 REC/REG 31600-MW4-003 $227.00



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fogrider



Joined: 10 Feb 2016
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Location: East Yorkshire

  

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PostPosted: Wed Feb 27, 2019 10:04 am    Post subject: Reg/rec units  


Thanks Larry, that's helpful info, I tried Rex's speed shop again and he is coming back to me , today hopefully, as to wether the Blackbird unit ( for EFi) is OK, it would seem so, I assume the R1 is EFi ?, never had one, Honda's my favourite Jap !
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Busy Little Shop
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PostPosted: Wed Feb 27, 2019 8:01 pm    Post subject:  


You're welcome Terry... yes the R1 Rec/Reg I employed is EFi...

Please type the whole word Japanese because what I learned living in Japan
for 3 years is the term "Jap" is still cuts like a war time slur...

The exception is if you fought in the Pacific in WW2... I think you might have
a good reason to refer to the Japanese as "Japs"... after all you were
trained to use that word... other than that for us born in the post war years
we should make a habit typing the whole word...








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Larry L
94 RC45 #2 / RC30 #44
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fogrider



Joined: 10 Feb 2016
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Location: East Yorkshire

  

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PostPosted: Wed Feb 27, 2019 9:07 pm    Post subject: reg/recs  


That's amazing stuff given out to the troops, I had no idea, my interest in WW2 is Europe, I've lear'nt something here and will ensure it's Japanese now !
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fogrider



Joined: 10 Feb 2016
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Location: East Yorkshire

  

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PostPosted: Thu Feb 28, 2019 9:13 am    Post subject: reg/rec units  


It occurred to me that there was a test chart for the unit in my Haynes manual for my VFR750.Comparing the P15-7 one with the VFR, big difference. The RC45 shows the R/H side boxes as infinity. The VFR one gives actual readings.
Maybe carbs/EFi difference ?
The other thing is, both those charts set Kohms for the test, yet two of the on-line proceedures I found were with the diode setting.
Rex's speed shop say they have one that should do, but that's not like saying "this is correct". I don't want to fry the loom or the alternator.
My local bike shop have a catalogue of reg/regs, many look identical, two plugs, 3 yellows, 2 green/2 red etc, but why so many variations? Is it just plug type and bolt centres ? Or resistance variations ?
I still think a Blackbird will do, going to try a breaker and see if they will let me do the checks as per 15-7 to see how they compare.
Work in progress !
Larry, are Americans still Yanks ? Had to ask !
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Vfxdog



Joined: 12 Jun 2011
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PostPosted: Thu Feb 28, 2019 12:46 pm    Post subject:  


Have you thought of trying Electrex World in the UK? They make a regulator/rectifier for the RC45- it's the RR58; comes with a heavy duty connection kit; you will need their AD58-2 adapter plate which matches your OEM bolt centres.

So far I have had no issues with their products; I've used them for RC30's and for older Ducatis.
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fogrider



Joined: 10 Feb 2016
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PostPosted: Thu Feb 28, 2019 4:42 pm    Post subject: reg/recs  


Thanks for that, I had looked at their site but didn't see one listed for the RC45, will look again, properly !
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Busy Little Shop
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PostPosted: Thu Feb 28, 2019 9:00 pm    Post subject: Re: reg/rec units  


fogrider wrote:

Work in progress !
Larry, are Americans still Yanks ? Had to ask !


I don't mind because America is also a work in progress... we began as
American colonist are a race of convicts who ought to be thankful for anything
the King allows then short of hanging... to the WW2 cry the Yanks are over
paid, over sexed and over here... all in all America is not herself unless she is
engaged in high moral ground...
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Busy Little Shop
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PostPosted: Thu Feb 28, 2019 10:50 pm    Post subject:  


Back on message...

If you wish to reduce the load on the charging system just pull the 20A headlight fuse...

Fuse Box
20A Fuel Injection-Ignition-Fuel Pump
10A F/R Brake-Turn Sig-Meter-Indicator
10A Stater-Bank Angle Sensor
10A Fan Motor
20A Headlights
10A Position-Meter Light-Tail-Horn
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Larry L
94 RC45 #2 / RC30 #44
https://www.youtube.com/user/BusyLittleShop/feed
http://s1036.photobucket.com/user/BusyLittleShop/library/ShangriLa?page=1
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Vfxdog



Joined: 12 Jun 2011
Posts: 54
Location: California

  

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PostPosted: Fri Mar 01, 2019 9:08 am    Post subject:  


Larry- pulling the headlight fuse won't ease the load on the charging system. The alternator output is not regulated as such- it always produces the same output for given RPM. That's not always the case with alternators, but is is with Hondas of this period.

What happens is that excess energy is dissipated by the reg/rec in the form of heat. If you remove the headlight load, the reg/rec will have more heat to get rid of.

A better reg/rec is the answer, along with improved connections in the cable from the alternator.
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fogrider



Joined: 10 Feb 2016
Posts: 63
Location: East Yorkshire

  

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PostPosted: Fri Mar 01, 2019 11:14 am    Post subject: reg/recs  


The Electrex RR58 doesn't have the 2 sets of leads so can't make the wiring loom reach. Got back to Rex's speed shop and they can supply the equivalent of RR58 but with the 2 pairs of leads. Apparently as long as there is 2 reds, 2 greens, it will be suitable for the output. Most of the unit differences are simply bolt holes and plug types.
I'm confident Rex's are supplying the right one. I believe it will be a Mosfet one.

Regards all,
A 'Limey ', over the pond !
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Vfxdog



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PostPosted: Fri Mar 01, 2019 12:49 pm    Post subject:  


Part of the issue with these reg/recs is to do with the connector for the alternator leads. If you want to stay plug and play using the original connectors, that's fine, but don't assume all will be well and will stay all well.

Check out the thread titled "newbie" stated by RVFRC45 gary in Aug 2013 for some very useful information.
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fogrider



Joined: 10 Feb 2016
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Location: East Yorkshire

  

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PostPosted: Fri Mar 01, 2019 5:03 pm    Post subject: reg/recs  


Thanks VFx, I've read the Newbie stuff, it all fits into place with what I have been told by the different firms I have rung,.
Larry's R1 unit sounds good, I think from what Rex's speed shop said what they're sending me will be a similar electrical spec but I will have to replace the two connector blocks. (the yellow 3 block was already direct wired anyway)
I noticed Electrex can supply a bolt hole adaptor which is also an extra heat sink. I will make one up to fit the new unit.
Hopefully, this will cure the red blink and brief stumble .
Watch this space !
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Busy Little Shop
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PostPosted: Fri Mar 01, 2019 8:04 pm    Post subject:  


Vfxdog... you're right but here are my thoughts that I didn't explain... if Terry
is unsure about carbs/EFi requiemnt difference he could test that concern by
removing or adding the 20A headlight fuse and running different Rec/Regs to
confirm or disprove whether EFi 20A requirement caused any ramifications to
the system...
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Larry L
94 RC45 #2 / RC30 #44
https://www.youtube.com/user/BusyLittleShop/feed
http://s1036.photobucket.com/user/BusyLittleShop/library/ShangriLa?page=1
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