Topic: CB750 K1 Starter Issue

[SoCalHarley]

My K1 starter suddenly stopped working after sitting for a few months without starting it.  Battery 100%.  I can hear the solenoid making the humming sound but starter not spinning.  Any suggestions before I pull the starter out.
Thanks

[MauiK3]

Check voltage at the starter, you may have a wire problem.
They are not hard to remove for checking.

[SoCalHarley]

Thanks.  Interesting there was no problem but after sitting the problem occurred.  I'll pull it out and check. Anything else it may be?

[BenelliSEI]

Sure about your battery? Sounds dead tome……

[scottly]

I can hear the solenoid making the humming sound but starter not spinning.

The solenoid making a humming or buzzing sound instead of a single click is a classic sign of a bad battery.

[SoCalHarley]

I had it on a trickle charger but then tried my Battery Charger and it showed 100%.  Started right up with the kick starter and ran perfectly. 

[scottly]

Check the battery voltage with a meter, then press the starter button and see how much the voltage drops.

[SoCalHarley]

I Just checked the voltage with a meter and the voltage drops off dramatically when I hit the starter.  Even though it is showing fully charged it looks like the battery is bad.  I have not seen this before so that is why it was confusing to me.  Thanks for your help.

I was using a BikeMaster Platinum AGM MS12-14L-A2 previously that lasted for several years.  Any suggestions for a replacement.

[denward17]

^Sounds like my 550 when the starter went bad.

[SoCalHarley]

I just tried a jump pack I have for my Harley and it cranked right over.  Definitely the battery.

[SoCalHarley]

I was using a BikeMaster Platinum AGM MS12-14L-A2 previously that lasted for several years.  Any suggestions for a replacement.

[newday777]

I was using a BikeMaster Platinum AGM MS12-14L-A2 previously that lasted for several years.  Any suggestions for a replacement.

Yuasa or Motobatt are good choices in AGM