Starter motor will not turn - GSXR.com
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post #1 of 7 (permalink) Old 08-06-2019, 10:44 AM Thread Starter
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Starter motor will not turn

Ok so yet another problem with my 2000 gsxr 750.

I had taken the covers off the right hand side to check that my crank position sensor wasn't loose. I reassembled the covers and had done a few other bits trying to chase an electrical fault (CHEC light post) this included taking off the instrument cluster, disconnecting all the electrical connectors on the right side for the instrument cluster, ignition barrel etc and giving them a spray with contact cleaner.

My problem is that the starter motor will not turn. I was worried that i had misaligned a gear or something so currently i have the engine covers off again to eliminate the engine itself from being seized (turns with a ratchet) so the starter motor is not connected to anything mechanically in terms of the engine etc.

When i press the starter i hear a click from the starter relay and the dash shuts off. The starter motor will not turn when it clicks. I have tried touching the starter motor briefly directly to the battery positive terminal by using the wire from the starter relay to the starter motor but it just sparks and the starter will not turn.

The battery voltage is around 12.7 volts, and had dropped to 12.4 after trying a few times. I have a new battery on order and should arrive tomorrow.

In an attempt to see if the starter motor was seized i used a set of mole grips to turn the shaft and it does turn but is difficult. How easy should the shaft of a starter motor rotate?

Is this likely to be a dead starter motor or a dead starter relay? Or am i missing an electrical connection somewhere that could be faulty?

Last edited by Ross46; 08-06-2019 at 10:51 AM. Reason: missing information
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post #2 of 7 (permalink) Old 08-06-2019, 10:53 AM
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What is the battery voltage? If that is good Why don't you ohm out the motor and see if its good. Simple to do. I see you have good batt voltage. So check out the starter motor disconnect the leads from it check the resistance thru the motor there should be some, open or OL the motor is toast


Last edited by JETMECHANIC; 08-06-2019 at 10:57 AM.
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post #3 of 7 (permalink) Old 08-06-2019, 10:59 AM Thread Starter
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sorry i had just edited my post before you posted.

"The battery voltage is around 12.7 volts, and had dropped to 12.4 after trying a few times. I have a new battery on order and should arrive tomorrow."

will get the new battery and try that in case my battery is dead. Ohm out the motor? Could you elaborate as the only thing i can find in the manual is after stripping it unless you mean checking that the motor is earthed? positive test lead to the positive starter motor lead and negative test lead to battery negative?
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post #4 of 7 (permalink) Old 08-06-2019, 02:05 PM
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Quote:
Originally Posted by Ross46 View Post
sorry i had just edited my post before you posted.

"The battery voltage is around 12.7 volts, and had dropped to 12.4 after trying a few times. I have a new battery on order and should arrive tomorrow."

will get the new battery and try that in case my battery is dead. Ohm out the motor? Could you elaborate as the only thing i can find in the manual is after stripping it unless you mean checking that the motor is earthed? positive test lead to the positive starter motor lead and negative test lead to battery negative?
12.7 volts is plenty. The Battery is not your problem. Ohm out the starter motor you will need a volt/ohm meter get a cheap one at auto parts store put the meter on ohms scale and put one lead on the positive connection and one on the negative with the wires that go to the starter removed from the starter. You should get a reading it should not read OL and should not read real high.

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post #5 of 7 (permalink) Old 08-06-2019, 08:03 PM
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What is the battery voltage when you try to engage the starter?

Considering your dash is going dead/resetting, either the battery is bad, you have a bad battery connection or the ground or power leads have bad connections.

Quote:
Originally Posted by Chuckster View Post
If you think reading is tricky, how the hell are you going to follow troubleshooting directions?
"Riding well is difficult, riding poorly is easy and painful."
- Nick Ienatsch


"We're all here because we're not all there" - Guy Favron on Gold Rush

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post #6 of 7 (permalink) Old 08-13-2019, 07:14 AM Thread Starter
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Changed the battery to a brand new one, same problem. Took the starter motor out and the shaft had seized. Turned out the bearing for the shaft on the SM had failed and seized it solid. Have regreased it so it turns and will give it a quick spin to check the rest of the system while waiting for another SM to turn up.... yet more money!! lol
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post #7 of 7 (permalink) Old 08-13-2019, 08:28 AM
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Nice. I don't think there has been a seized starter problem posted any time recently.

I guess we are getting into 20 year old bikes, with some stored outside, so we may see more of this issue.
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Quote:
Originally Posted by Chuckster View Post
If you think reading is tricky, how the hell are you going to follow troubleshooting directions?
"Riding well is difficult, riding poorly is easy and painful."
- Nick Ienatsch


"We're all here because we're not all there" - Guy Favron on Gold Rush

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