Why does the Rectifier/ Regulator go bad? - Suzuki GSX-R Motorcycle Forums Gixxer.com
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post #1 of 100 (permalink) Old 12-09-2008, 11:22 AM Thread Starter
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Why does the Rectifier/ Regulator go bad?

I was out on a ride and coming to stop at a red light I squeezed the clutch and the bike just died. Pulled over, popped the fuses to find out that the 30amp blew. I had a spare, but as soon I put it in, it blew again, then borrowed a friend 30amp, blew again . Uhaled the bike home and spent the weekend with the bike and a multimeter. Figured out it was the Rectifier/Regulator that went bad, ordered another one and the bike is up and running strong.

What I want to know is what causes the Rectifier/Regulator to malfunction? There are no burnt wires or connectors and it looks exactly like the new one I ordered, so what gives?
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post #2 of 100 (permalink) Old 12-09-2008, 11:24 AM
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Re: Why does the Rectifier/ Regulator go bad?

A few people have had them go bad. My stator and rectifier/regulator went out at 30K miles, then the rectifier again 5K later(the dealership thought it was a bad refurbished one they put in the first time)... thank goodness for extended warranties
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post #3 of 100 (permalink) Old 04-22-2009, 11:49 AM
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Re: Why does the Rectifier/ Regulator go bad?

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Originally Posted by scheme84 View Post
I was out on a ride and coming to stop at a red light I squeezed the clutch and the bike just died. Pulled over, popped the fuses to find out that the 30amp blew. I had a spare, but as soon I put it in, it blew again, then borrowed a friend 30amp, blew again . Uhaled the bike home and spent the weekend with the bike and a multimeter. Figured out it was the Rectifier/Regulator that went bad, ordered another one and the bike is up and running strong.

What I want to know is what causes the Rectifier/Regulator to malfunction? There are no burnt wires or connectors and it looks exactly like the new one I ordered, so what gives?
Exactly the same thing happened to me a few days ago. Turned out the rectifier was burnt. Still trying to get a replacement now. Like you, am also interested in knowing what could have caused the rectifier to fry. I have a fairly new bike, an 07 GSXR 750, with only 16000 KMS (not miles) on it. The only thing I did recently was to install a TRE about 1500 KMS prior.
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post #4 of 100 (permalink) Old 04-22-2009, 01:16 PM
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Re: Why does the Rectifier/ Regulator go bad?

Heat. Bikes get hot and the byproduct of the RR is heat. Dissipation is done through fins on the RR but over time as heat builds up and the metal degrades, RR's go out. Notoriously on a few certain bikes.
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post #5 of 100 (permalink) Old 04-22-2009, 08:38 PM
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Re: Why does the Rectifier/ Regulator go bad?

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Heat. Bikes get hot and the byproduct of the RR is heat. Dissipation is done through fins on the RR but over time as heat builds up and the metal degrades, RR's go out. Notoriously on a few certain bikes.
Thanks. Perhaps more so for us here in the Philippines. Riding here can get very hot sometimes, particularly now that it's summer. My mechanic suggested that we install the new rectifier in a different place, not so near the exhaust headers. Is that ok?
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post #6 of 100 (permalink) Old 04-22-2009, 08:45 PM
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Re: Why does the Rectifier/ Regulator go bad?

If I remember correctly ours is right behind the radiator which is an ideal spot being that wind hits it. You can try mounting it elsewhere but make sure it has sufficient air flow.
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post #7 of 100 (permalink) Old 04-22-2009, 09:08 PM
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Re: Why does the Rectifier/ Regulator go bad?

Ok thanks! Will discuss with mechanic when replacement RR arrives. Attaching pic of burnt rectifier.
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post #8 of 100 (permalink) Old 04-23-2009, 12:19 AM
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Re: Why does the Rectifier/ Regulator go bad?

Crazy you ride in the Philippines! I was there for the first time in 1999. I couldn't imagine riding the streets there.
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post #9 of 100 (permalink) Old 04-23-2009, 01:03 AM
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Re: Why does the Rectifier/ Regulator go bad?

Mine went out for the 3rd time now at 45K..... next time I'm gonna install it somewhere else I think
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post #10 of 100 (permalink) Old 04-23-2009, 02:26 AM
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Re: Why does the Rectifier/ Regulator go bad?

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Crazy you ride in the Philippines! I was there for the first time in 1999. I couldn't imagine riding the streets there.
Yes, it can be quite crazy riding here, but one gets used to it. Besides, there's nowhere else for us to ride.

I belong to a group of sportsbike riders here. We go fast, but try to be safe by focusing on skills development. Let me know if you happen to visit and want to ride.
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post #11 of 100 (permalink) Old 04-23-2009, 02:27 AM
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Re: Why does the Rectifier/ Regulator go bad?

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Mine went out for the 3rd time now at 45K..... next time I'm gonna install it somewhere else I think
Any idea what could be a good spot?
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post #12 of 100 (permalink) Old 04-23-2009, 08:25 AM
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Re: Why does the Rectifier/ Regulator go bad?

why not just make a custom bracket from some sheet metal to guard it from the header heat? and apply exhaust wrap on the bracket. kinda like an after market intake. you guys know what i mean?
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post #13 of 100 (permalink) Old 04-23-2009, 11:33 AM
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Re: Why does the Rectifier/ Regulator go bad?

mine went at about 17k thank god for ebay
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post #14 of 100 (permalink) Old 04-23-2009, 04:02 PM
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Re: Why does the Rectifier/ Regulator go bad?

Look for pics of the Vesrah Suzuki and m4 racebikes from 06. They all mounted the rectifier on the frame rail left hand side of the engine. The only bare spot of the frame not covered by fairing. Pretty neat.
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post #15 of 100 (permalink) Old 04-23-2009, 04:37 PM
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Re: Why does the Rectifier/ Regulator go bad?

Mine went out a few months ago too. Took me a while to figure out that the R/R was bad because the diode test I performed on it several time showed nothing wrong with it. Do aftermarket ones exist?
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post #16 of 100 (permalink) Old 04-23-2009, 04:47 PM
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Re: Why does the Rectifier/ Regulator go bad?

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Originally Posted by fmvarela View Post
Any idea what could be a good spot?
Quote:
Originally Posted by ImStricken View Post
why not just make a custom bracket from some sheet metal to guard it from the header heat? and apply exhaust wrap on the bracket. kinda like an after market intake. you guys know what i mean?
Quote:
Originally Posted by TheCunningMan View Post
Look for pics of the Vesrah Suzuki and m4 racebikes from 06. They all mounted the rectifier on the frame rail left hand side of the engine. The only bare spot of the frame not covered by fairing. Pretty neat.
Both good ideas. Also I saw on the 1000's from similiar years and maybe even newer years they're mounted under the tail near the rear shock.... seems like a pretty good spot too
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post #17 of 100 (permalink) Old 04-23-2009, 06:42 PM
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Re: Why does the Rectifier/ Regulator go bad?

On my 07 600 both my Stator and RR went on me with only 1,300 miles or 8-10 trackdays on the bike (track only bike). Went through tons of 30 fuses trying to figure out what the problem was. It took the shop sometime to figure out it was the stator and RR.

The issue is heat as was stated earlier in this thread. I got a good deal used parts and installed them. I've only had the bike on the track once since. I'll see how this season goes. I'm keeping my eyes open for cheap parts to have as back up, in case this happens again.

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post #18 of 100 (permalink) Old 04-23-2009, 08:44 PM Thread Starter
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Re: Why does the Rectifier/ Regulator go bad?

Hmm...then how about adding a fan to the RR. I'm thinking a computer fan should work, its small, efficient, and pretty strong (definitely a weekend project).

Also can someone post pics of the Versah or M4 Suzuki with the RR mounted other than the OEM position.
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post #19 of 100 (permalink) Old 04-23-2009, 10:29 PM
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Re: Why does the Rectifier/ Regulator go bad?

How about Suzuki re engineer the part and it's location instead of us having to do it for them.
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post #20 of 100 (permalink) Old 04-23-2009, 10:36 PM
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Re: Why does the Rectifier/ Regulator go bad?

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How about Suzuki re engineer the part and it's location instead of us having to do it for them.
Brilliant!
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