electrical problem when Hot - Honda Motorcycles - FireBlades.org
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post #1 of 15 Old 09-26-2017, 8:51 AM Thread Starter
 
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electrical problem when Hot

I have a 1997 CBR 900RR that I bought a battery a month ago because I thought it was a battery problem, now it has happened 2 times again. Riding on the highway and stopping and starting right away is no problem. but when I ride very slow in stop and go bumper to bumper traffic for over 30 minutes, the bike feels very very hot, the aluminum frame is so hot I can
t touch it. But the Temp gauge never gets into the red, the fan will come on and it stays at about 3/4 on the temp gauge no higher. The problem is if I accidently kill the bike in traffic, then it will not crank back up, It feels like the battery is dead. if I pull over to the side and sit there for a hour then it will crank back up, even though the battery feels weak. the multimeter I put on the battery shows 13.1 volts at 4,000 rpms, idling it is right at 12.0, does this sound like rectifier has overheated? its the original rectifier I believe.
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post #2 of 15 Old 09-26-2017, 11:39 AM
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Re: electrical problem when Hot

Hi , does sound like your Reg/Rec , the only way it can get rid of excess is to dump it as heat, is your battery getting hot also?
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post #3 of 15 Old 09-26-2017, 12:49 PM
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Re: electrical problem when Hot

If you're "testing" your battery while your machine is running, you're really only testing the output of your stator and R/R. The battery needs to be separate from the bike (or disconnected) to accurately test voltage and/or amperage.

...and IF the R/R is original, 21 years ain't a bad run

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post #4 of 15 Old 09-27-2017, 8:34 AM Thread Starter
 
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Re: electrical problem when Hot

I tore in thebike today and found the connector going to the rectifier is all burnt and melted and wires are touching each other, the wires for about 5 inches from rectifier are all burnt and hard. I got a mess, it appears the previous owner put the wrong rectifier on the bike. the five wire connector has 3 wires up top and two spaced in bottom, the rectifier I took off the bike has 3 wire connectors on the bottom and 2 on the top . I don't understand that one.
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post #5 of 15 Old 09-27-2017, 9:07 AM
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Re: electrical problem when Hot

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Originally Posted by jward View Post
I tore in thebike today and found the connector going to the rectifier is all burnt and melted and wires are touching each other, the wires for about 5 inches from rectifier are all burnt and hard. I got a mess, it appears the previous owner put the wrong rectifier on the bike. the five wire connector has 3 wires up top and two spaced in bottom, the rectifier I took off the bike has 3 wire connectors on the bottom and 2 on the top . I don't understand that one.
I'd certainly invest in another Reg/Rec , but tidy up the wires and connecters first
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post #6 of 15 Old 09-27-2017, 10:14 AM
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Re: electrical problem when Hot



Purchase a new stator (and gasket) and OEM quality battery (Yuasa) as well, unless the one you just bought is.
In my opinion, it's better to replace the whole system for "piece of mind".

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post #7 of 15 Old 09-27-2017, 6:59 PM
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Re: electrical problem when Hot

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Originally Posted by unslow1 View Post


Purchase a new stator (and gasket) and OEM quality battery (Yuasa) as well, unless the one you just bought is.
In my opinion, it's better to replace the whole system for "piece of mind".
Good advice right there. I think most of us have "been there, done that".

I did both of my 900's with aftermarket MOSFET regulators that are a lot bigger, but just going with an OEM one should net you another 18-20 years of riding.
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post #8 of 15 Old 09-28-2017, 11:58 AM Thread Starter
 
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Re: electrical problem when Hot

does anybody have a picture of how the wires go in the connector as my connector is completely melted and the wires were all out of order, i have 3 yellow 1 green and 1 red and white striped one.

starting on left top it looks like green then yellow then red/white
on bottom it looks like yellow and yellow

HELP
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post #9 of 15 Old 09-28-2017, 12:17 PM
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Re: electrical problem when Hot

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Originally Posted by jward View Post
does anybody have a picture of how the wires go in the connector as my connector is completely melted and the wires were all out of order, i have 3 yellow 1 green and 1 red and white striped one.

starting on left top it looks like green then yellow then red/white
on bottom it looks like yellow and yellow

HELP
Here you are ,from your manual
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post #10 of 15 Old 09-28-2017, 1:23 PM
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Re: electrical problem when Hot

OEM should only have 5 wires to the Reg/re
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post #11 of 15 Old 09-28-2017, 3:54 PM
 
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Re: electrical problem when Hot

Quote:
Originally Posted by unslow1 View Post


Purchase a new stator (and gasket) and OEM quality battery (Yuasa) as well, unless the one you just bought is.
In my opinion, it's better to replace the whole system for "piece of mind".
I just learned a hard lesson, DO NOT BUY CHEAP ELECTRICAL PARTS FROM EBAY, spend the money and buy reputable parts, I bought a Stator and Reg/rec form Ricks motorsports, quality stuff.
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post #12 of 15 Old 09-28-2017, 6:03 PM
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Re: electrical problem when Hot

Quote:
Originally Posted by BigdaddyPaz View Post
I just learned a hard lesson, DO NOT BUY CHEAP ELECTRICAL PARTS FROM EBAY, spend the money and buy reputable parts, I bought a Stator and Reg/rec form Ricks motorsports, quality stuff.
I too, recommend Rick's equipment
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post #13 of 15 Old 09-29-2017, 3:20 AM Thread Starter
 
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Re: electrical problem when Hot

Hello Guys, thank you for all the help and knowledge as I am lost with electricity. I replaced the r/r and got the wires all figured out and plugged in. now the bike is charging 13.2 volts at idle. BUT when I increase the rpm's to 2,000 rpm's the volts go down to 12.0 and stay there up to 5,000 rpms. So I think you have told me I should be looking at a new stator now. I did do a check on the 3 yellow wires and they averaged about 46 to 47 volts crossing them all three ways at 5,000 rpms.
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post #14 of 15 Old 09-29-2017, 4:18 AM
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Re: electrical problem when Hot

Quote:
Originally Posted by jward View Post
Hello Guys, thank you for all the help and knowledge as I am lost with electricity. I replaced the r/r and got the wires all figured out and plugged in. now the bike is charging 13.2 volts at idle. BUT when I increase the rpm's to 2,000 rpm's the volts go down to 12.0 and stay there up to 5,000 rpms. So I think you have told me I should be looking at a new stator now. I did do a check on the 3 yellow wires and they averaged about 46 to 47 volts crossing them all three ways at 5,000 rpms.
Yup , new stator
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post #15 of 15 Old 09-29-2017, 5:51 AM
 
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Re: electrical problem when Hot

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Originally Posted by unslow1 View Post
I too, recommend Rick's equipment

I totally agree the statement about cheap parts... i usually go to bikebandit to get my parts... but I gotta check out this Ricks equipment.
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