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minor electrical/starting issue

Started by dougrs, September 24, 2013, 04:05:27 PM

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dougrs

Quote from: not a lib on October 08, 2013, 08:48:23 PM

When was the last time the starter was serviced? 

Starter was installed in May. The old starter gave me problems, slow starting, hard starting, etc. For much of this summer I did not have starting issues with the new starter, then occasionally I had the issue described above, and recently it has been more frequent.
1989 Yamaha FJ1200
1994 BMW K75

FJ_Hooligan

How's the main lead going to the starter?  Flex it to make sure there isn't any corrosion anywhere along its length.

Once it starts, does it run normally?  Not like it needs to clear up excess fuel or anything like that?

If you can make it happen, you might try putting a wrench on the left side of the crank and see if you can turn the motor over by hand.  That would tell you if it's anything mechanical in the engine (although I can't imagine what would lock the crank up then fix itself and run normally).
DavidR.

movenon

Something to throw into the fire here. The starter relay contacts (connector or internal relay contacts) might be in not the best shape ? You could jumper past the relay and see if she spins and better ?
George
Life isn't about having the best, but about making the best of what you have...

1990 FJ 1200

dougrs

Quote from: FJ_Hooligan on October 09, 2013, 10:23:40 AM
How's the main lead going to the starter?  Flex it to make sure there isn't any corrosion anywhere along its length.

Once it starts, does it run normally?  Not like it needs to clear up excess fuel or anything like that?

If you can make it happen, you might try putting a wrench on the left side of the crank and see if you can turn the motor over by hand.  That would tell you if it's anything mechanical in the engine (although I can't imagine what would lock the crank up then fix itself and run normally).

It does run ok once it fires. I have been getting some more vibrations once it is running, but I have not been able to look into that yet.
1989 Yamaha FJ1200
1994 BMW K75

dougrs

Quote from: movenon on October 09, 2013, 05:56:36 PM
Something to throw into the fire here. The starter relay contacts (connector or internal relay contacts) might be in not the best shape ? You could jumper past the relay and see if she spins and better ?
George

I have not had any time to look into the issue more. I will attempt to jump the relay and report back. It does seem though that most below that this is a starter issue, so that is where I will focus my efforts. thanks for the suggestions so far.
1989 Yamaha FJ1200
1994 BMW K75

movenon

It probably is your starter or battery but it would be a bad deal if you replaced the starter and found out it was something else that you should have checked.
Not that I haven't been down that road myself.  :rofl2: :rofl2: :dash2: Let us know what you find out, its a learning experience for all of us.  :drinks:
George
Life isn't about having the best, but about making the best of what you have...

1990 FJ 1200

dougrs

Quote from: dougrs on October 09, 2013, 06:55:59 PM
Quote from: movenon on October 09, 2013, 05:56:36 PM
Something to throw into the fire here. The starter relay contacts (connector or internal relay contacts) might be in not the best shape ? You could jumper past the relay and see if she spins and better ?
George

I have not had any time to look into the issue more. I will attempt to jump the relay and report back. It does seem though that most below that this is a starter issue, so that is where I will focus my efforts. thanks for the suggestions so far.

I wanted to follow up on my previous posts from last month.....
I used a jumper wire to bypass the starter relay today and the bike turned right over and cranked with no issue. So I have determined that my starter relay is bad and I will be replacing it. Making progress...

However, My fuel gauge has gone a little crazy the needle seems to read correctly at idle, but then when riding it fluctuates up and down. I am assuming this is an issues with one of the wires going from the sender to the gauge and will be trying to fix that soon.
1989 Yamaha FJ1200
1994 BMW K75

Pat Conlon

Clean your electrical connections...all of them. It's a pain, but necessary on our old bikes.
That may be the reason for the failure on your starter relay. Voltage drop.
On relays, as the voltage drops (via poor connections) the amperage draw increases on the contractor coil. (ohm's law)
This higher amperage can, and will over time, cook the wires in the contractor coil.

Clean your connectors.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

movenon

Thanks for the follow up. I am glad it was just a starter relay. Easy to fix and easy to work around in an emergency to get you started.  :good2:
George
Life isn't about having the best, but about making the best of what you have...

1990 FJ 1200

FeralRdr

Quote from: Pat Conlon on November 13, 2013, 03:56:10 PM
Clean your electrical connections...all of them. It's a pain, but necessary on our old bikes.
That may be the reason for the failure on your starter relay. Voltage drop.
On relays, as the voltage drops (via poor connections) the amperage draw increases on the contractor coil. (ohm's law)
This higher amperage can, and will over time, cook the wires in the contractor coil.

Clean your connectors.

This may sound a little strange, but a handy way to clean connectors is to use this: http://www.jelmar.com/TarnXbasic.htm

Just dip the connector in the TarnX for a few minutes, and rinse with very hot water (not boiling - you don't want to melt your connector).  The hot water will evaporate/dry quicker.  You do want to make sure it drys thoroughly (hair dryer works great for this), then use dielectric grease to prevent further corrosion.

dougrs

Quote from: FeralRdr on November 13, 2013, 06:54:31 PM
Quote from: Pat Conlon on November 13, 2013, 03:56:10 PM
Clean your electrical connections...all of them. It's a pain, but necessary on our old bikes.
That may be the reason for the failure on your starter relay. Voltage drop.
On relays, as the voltage drops (via poor connections) the amperage draw increases on the contractor coil. (ohm's law)
This higher amperage can, and will over time, cook the wires in the contractor coil.

Clean your connectors.

This may sound a little strange, but a handy way to clean connectors is to use this: http://www.jelmar.com/TarnXbasic.htm

thanks

Just dip the connector in the TarnX for a few minutes, and rinse with very hot water (not boiling - you don't want to melt your connector).  The hot water will evaporate/dry quicker.  You do want to make sure it drys thoroughly (hair dryer works great for this), then use dielectric grease to prevent further corrosion.
1989 Yamaha FJ1200
1994 BMW K75