rectifier

[gibson1]

Can I use any voltage rectifier thats on ebay in my 1988 FZR400. OEM is sh569-12
Would like to use sh629a-12 chinese. cheap $20 Is this Ok
dave

[yamaha_george]

Can I use any voltage rectifier thats on ebay in my 1988 FZR400. OEM is sh569-12
Would like to use sh629a-12 chinese. cheap $20 Is this Ok
dave

Dave ,
you could but the bike is worth more than 20 dollars surely,
best to get one from alate model Yamaha of e-bay.

See the WIKI for details of how to's etc
OR
http://www.saltmine.org.uk/fzr/vr.html

[gibson1]

Both recitfiers are by Shindengen made (German)
Both - Voltage range 14.3 - 15.3 Volts ,Capacity 25 Amp and Maximum voltage of 200 volts.
The SH629a-12 has the built in heat sink new type.
Therefore it should work. Well let you know.

Dave

[DonTZ125]

Shindengen is based out of Tokyo, but have branches world-wide. They make some good rectifiers, including the FH012 suggested as an upgrade on many sites.

http://www.motorcityreman.com/shoesh1.html
The only issue I see with the SH629 is that it uses the same flawed grounding system as the original design. By using the body as the ground, the ground path becomes vulnerable to oxidation, differential-metal corrosion, looseness, and just plain gunge. This can in turn cause heat build-up in the regulator, cooking first the VRR and then the rest of your electrical system. The fins address the symptom, not the cause. You'd probably be better off with a newer 5- or 6-pin regulator with a dedicated ground pin that connects to a wire that runs back to the battery or engine ground bolt.

(Conflict of interest alert - I am about to start selling an adaptor harness that makes using 6-pin regulators a plug-and-play prospect. )

[yamaha_george]

+5 on the corrosion problem with grounding etc.

Why any one would risk their bikes electrics costing several 100 dollars for the sake of a few dollars extra always puzzles me

[gibson1]

Better off with a newer 5- or 6-pin regulator with a dedicated ground pin that connects to a wire that runs back to the battery or engine ground bolt.
Where can I buy one of these. I don't care about price. For now I'm going to use a heat stink behind the OEM rectifier. Than a 12 volt fan out of a computer.( 12V .019 amp)

Dave

[DonTZ125]

Like Y-G said, your best bet is EBay - look for either R6 or YZF600.
http://cgi.ebay.ca/YAMAHA-R6-R6S-OEM-RE ... 45f9639ce5

[zerogara]

That 629 is what I use, MK1 type TDM and FJ600s among many others use them and I'd go with a Japan/Taiwan made rather than China. On top of all the cooling fins it has if you mount it on the stock aluminum heat shink/plate you'll get plenty of heat dispersal. The grounding problem I believe is the primary issue and so I run a flat ground wire I took off an AC box, from the mounting bolt to the battery frame/ground. Haven't had a problem since the original stock OEM fried itself about 30+k mi ago.