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Starter spins on bench but won’t crank bike

2050 Views 25 Replies 8 Participants Last post by  Tim.catherwood
Hello new member here and would appreciate any assistance. I live in Guelph Ontario Canada which is about 45 ride from Toronto. My 82 CX500 Custom was my daily driver all season and after sitting for just a couple of weeks won’t crank.
I tried a few known good batteries and even load tested them but wouldn’t crank. Solenoid just clicks. I have full voltage >12V through solenoid (power side). I pulled the starter and cleaned everything, replaced brushes and performed ground mod. On the bench it spins with power but in the bike it doesn’t. I can spin the engine over easily with a small rachet on the crank bolt.
The engine isn’t seized and plugs are out. Could I have a weak starter? I can’t seem to locate a new one online. Any suggestions?
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Chances are good the problem is the starter solenoid, not the starter.

Also, what's this "ground mod" for the starter?

I think that's your issue. I don't have any issues. Well, okay I have plenty of issues, but some girl will have to deal with them in the future.

  • Haha
Reactions: 1
So it'll spin on the bench but it won't spin under load.

First... is the engine locked up? Put it in 5th gear on the center stand and rotate the rear wheel. If you can't rotate it, the engine might be frozen or hydro-locked. Second.... are you sure the battery is good and fully charged? Try jump-starting the bike off a running car or one of those lithium jump boxes.

If that's not it, then you likely have a bad winding in the armature, and it's time for a new starter.

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