HONDA REGULATOR RECTIFIER –

Replacement - CB-750, CB-1000, CBR-1000F, ST-1100.

(SHINDINGEN # SH261-12).

This paper looks at the options when replacing the following;

Honda regulator rectifier Assy 31600-MS2-601 (Shindingen # SH261-12) that fits;

• CB-750 Nighthawk 750 1991-2004 • CB-1000 1994-1995 • CBR-1000F (Hurricane) 1990-1996 • ST-1100 1991-1995 • ST-1100a ABS 1992-1995.

WARNING: This paper is only of “Reference Use” to any other bike as the Regulator / Rectifier used here is very different to others.

Disclaimer / Attributes: The contents of this paper has been plagiarised from many sources for the benefit of all who face this issue. Web references/credits are given where I practically can. Special thanks: to Shadow1 and Daniel_ARG of WWW.CBRFORUM.COM Attached: Honda CBR1000F Service Manual Charging System Details.

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Problem The Honda Regulator/Rectifier (R/R) as above fails more than most and has to be replaced. What is the best solution? Issues

1. Why is the Honda R/R above different from most other R/Rs? 2. Honda R/R fails more than most – should I keep paying for this model

when it is a known problem? 3. Is there an alternate from another bike I can use? 4. What aftermarket solutions are there?

a. Do they have better reliability? b. Are they cheaper?

5. Are there other solutions? Do they work? Solution Buy

AU $160.00 Delivered to Australia. New type RR23 - more reliable than the smaller unfinned version. Lesley Houghton Electrex World Limited Tel: **44 (0)1491 682369 Fax: **44(0)1491 682286 www.electrexworld.co.uk

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Background

Motorcycles with batteries must convert the AC power from the stator into DC. In order to do this, the power coming from the stator must be converted by a regulator/rectifier. The rectifier actually converts the power from AC to DC, while the regulator keeps the power level (voltage) from going above the 13.8 -14.5 volts needed to power a standard 12 volt battery. It is important that the stator provides more power than needed by the motorcycle so that the battery will stay charged. If the motorcycle uses more power than the stator can provide, the battery will start to drain. This will typically happen if the voltage drops below 13 volts.

There are many variations on the simple theme of charging the battery in the motorcycle world. Following are the 13 major differences between charging systems. http://home.earthlink.net/~trinomial/chgtypes.html Fortunately, though it seems there is a confusing array, in reality, it can all be reduced to just two basic systems -- permanent magnet and electromagnet.

The Hondas we a looking at have the following;

• Later Three-Phase, • Electromagnet Alternator with • Combined rectifier and regulator.

Issues 1. Why is the Honda R/R above different from most other R/Rs?

R/R needs to be specification matched;

• A connector match • A physical match – for mounting / cooling

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• An electrical match - alternator stator to rectifier/regulator to minimum/maximum motorcycle electrical load.

Being a Later Three-Phase, Electromagnet Alternator with Combined rectifier and regulator; this R/R has a 6 wire connector and a separate earth to frame by physical contact. It is thus a 7 wire R/R – not a 6 wire. The R/R has no cooling fins by relies on the contact with the frame plate to dissipate its heat. Issue

2. Honda R/R fails more than most – should I keep paying for this model when it is a known problem?

Replacing the R/R with a Honda version will not overcome the overheat problems and component underspec issues. You can endeavour to dissipate the heat with heat sinks and fans but this is only a “band aid” solution. See later examples at end of report. Voltage Regulator

The only flaw I have found on this bike is the fact that the voltage rectifier/regulator runs very hot, and it also has a tendency to overcharge the battery. I think that when the battery is no longer in its best health, the reg tries to unsuccessfully bring up the battery's voltage so it keeps on throwing current at it, causing it to boil over and accelerating its demise. I have had 2 batteries die of complete electrolyte exhaustion after long trips and after serious introspection I can only attribute this to an overzealous reg.

http://gonzo-home.com/cbrmaint.htm#VoltageReg

Notice the complete lack of cooling fins (this generates huge amounts of heat - it produces somewhere around 40amps on the output!). That is one of the primary contributors to the failures - the inability to keep cool, and the resulting heat/cool cycle destroying the semiconductors contained inside.

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A New R/R – what it looks like…

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A Fried R/R – What it can look like – and when you open it up – if your interested.

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Issue 3. Is there an alternate from another bike I can use?

No. Because of the specifications listed above, no R/R from another bike will work properly (Give the right regulated charge.) Disregard “talk” about “I can fit a Yamaha R1 R/R” – it wont work in this case – it will however work with Blackbirds and VFRs, but that’s another story! Issue

4. What aftermarket solutions are there? • See the list below

5. Do they have better reliability? • Given the higher speced components and finned cooling they

appear to give better reliability. 6. Are they cheaper?

• Yes, Example in Australia in AU $. • Honda OEM replacement local $280 • Honda secondhand/used (if you can get it) $180 • Electrex (UK) type RR23 Delivered to Australia $160

SOLUTION LIST Rick's Motorsport Electrics – Same as OEM – No technical benefit.

Rectifier/regulator1990-96 CBR1000F, part# 10-108. $105 US and comes with a one year replacement warranty. Shipping charges to Australia = $10 US. http://www.ricksmotorsportelectrics.com/index.php?c=partLookup Amanda Shaw, PR & Marketing Coordinator Rick's Motorsport Electrics, Inc. 30 Owens Ct. #2 Hampstead, NH 03841 603-329-9901 www.ricksmotorsportelectrics.com

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Same as OEM – No technical benefit. 1990-1996 HONDA 1000/ CBR1000F REGULATOR

RECTIFIER $94.99

http://www.regulatorrectifier.com/catalog/advanced_search_result.php?keywords=CBR1000F&x=7&y=9 http://www.regulatorrectifier.com/catalog/index.php

gulatorrectifier.comEmail: info@re Telephone: (916) 799-4327

RM STATOR

$ 99.00 usd http://www.rmstator.com/index.php/Motorcycles/Honda/CBR1000F/CBR_1000F_Regulator_Rectifier/232 RM STATOR - 3033 ch. Audet, Ayer's Cliff Québec Canada, J0B 1C0

-877-838-1399 or 819-838-1395 seany@rmstator.com 1

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ElectroSport Industries

HOEM Part Number(s): 31600-MS2-601, 31600-MB0-008 A quality regulator/rectifier that replaces the OE Honda part. Power handling is superior, the part is designed to be a plug in replacement. This unit feeds the field coil in the alternatothat is mounted behind the cylinder block. When the alternator field coil fails (quite often actually, and its resistance then drops to less than 1 Ohm) it usually takes out the OE regulator/rectifier too. This new ESR230 has an overtemp safety device preventing failures like this. We haveand efficiently, ma

onda CBR/ST Regulator/Rectifier Part Number: ESR230

and r

incorporated a heatsink that gets rid of internal heat to the housing quickly king for a very reliable unit. The part comes with a full one year warranty.

ElectroSport Industries 3803 Oceanic Drive, Suite 201, Oceanside, CA 2056, USA PH: 1-888-369-8359 info@electrosport.com

Price: $99.00

9

Electrex World Limited

AU $160.00 Delivered to Australia. New type RR23 - more reliable than the smaller unfinned version like this

Lesley Houghton, Electrex World Limited Tel: **44 (0)1491 682369 Fax: **44(0)1491 682286 www.electrexworld.co.uk

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Issue 7. Are there other solutions? Do they work?

1. Here an earlier R/R has been fitted to a 92 CBR1000F. HONDA CBR1000F REGULATOR RECTIFIER 87-90 http://www.espel.com.ar/index.php?setidioma=en ESPEL S.A.I.C.A is an Argentinean company dedicated to manufactures and develop electromechanical and electrical original and modes – motorcycles – scooter parts.

http://www.cbrforum.com/m_483585/mpage_3/key_/tm.htm

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2. Examples of heatsinking and electric fan cooling.

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