Starter doesn't work when connected to scooter

[rancevas]

Hello you wonderful people!

So I am faced with a weird situation and really need your help.

First off, my starter works - I have connected it to the battery separately and it spun flawlessly. It can easily turn the engine over.

The problem is that when I connect the battery to the scooter and press the ignition button, the starter doesn't turn.

The starter relay clicks and the voltage that goes through the cables towards the starter is correct (voltage the same as the battery's).

So the fact that my starter stays stationary puzzles me.

What might be the issue and what can I do to fix it?

Thank you!

Yamaha Jog R 2007, Minarelli horizontal (80cc bore kit)

[ryan_ott]

Just because the solenoid clicks doesn’t mean it’s passing voltage/current through it. You could check for continuity through it. Contacts can get corrosion on them. Check for voltage on the starter side of the solenoid. If ok check your grounds from the starter to the frame and battery.

[rancevas]

Oct 19, 2018 9:19:08 GMT -5 ryan_ott said:

Just because the solenoid clicks doesn’t mean it’s passing voltage/current through it. You could check for continuity through it. Contacts can get corrosion on them. Check for voltage on the starter side of the solenoid. If ok check your grounds from the starter to the frame and battery.

So when the battery was connected to the scooter (and ignition button was pressed), I tested the the wires that go from relay (solenoid) to starter. There were two wires - red and black. My tester showed me that a current was passing through them of 13.5 V, as it should be. But when I connected those wires to the starter - it did nothing. And that's the weird part

So the relay (solenoid) shouldn't be the issue, since it passes voltage/current through it. But i will test it separately tomorrow, to be 100% sure.

I will double-check for corrosion and inspect every single wire separately. Also I'll check the grounds and tell you how it went.

In the meanwhile, got any other suggestions?

[dexameth]

So weird story. I had oil get into my starter motor (from excess crank pressure is my only guess) and it made my motor fail. Went for a ride, came back, wouldn't start back up. Just click click click. I swapped solenoid, same deal. Swapped starter motors, fired right up. Opened up the previous starter and it actually had motor oil in it, which killed continuity, meaning the starter motor wouldn't ground itself and no current could pass thru. Maybe check all your motor grounds, and make sure the starter motor is healthy.

edit: just realized it's a 2 stroke and you shouldn't have any oil to do such a thing.

[geoffh]

Rancevas,your puzzle might be solved in the CVT cover,it,s very complicated to explain here but here's what I,d do ,remove the variator and gear behind it clean and lightly lubricate,also clean the gear on the starter.

Geoff

[ryan_ott]

As mentioned by geoffh behind the variator there is a one way clutch, a reduction gear and some washers. One make sure the 3 springs and rollers are in the clutch, and see that all in lined up correctly. Clean, degrease and lube up.

[dexameth]

I totally looked past the 2 stroke part, disregard my post from earlier. Can you turn the motor over by hand?

[aeroxbud]

My money is on the starter clutch. Like said above its behind the variator. Its an easy fix. Sometimes the weights come out, but even a new one is not that expensive.

[rancevas]

Guys, the clutch and the whole variator assembly is not the problem. It works perfectly fine.

The issue is really damn complicated so I'll try to explain as best as I can:

When:

Starter is tightened in place -> Battery is connected to scooter -> ignition is pressed & current passes (13.5 V) -> nothing happens

But when:
Starter is tightened in place -> Battery is connected directly to starter -> starter spins and turns the engine over easily

[geoffh]

Yeah,you kind of said it in the first post,just to ask the obvious ? you do know that you have to hold the brake lever on for the system to work??

Geoff

[aeroxbud]

Oct 20, 2018 9:02:09 GMT -5 geoffh said:

Yeah,you kind of said it in the first post,just to ask the obvious ? you do know that you have to hold the brake lever on for the system to work??

Geoff

You might be on to something there. Perhaps a brake light switch is not working

From your first posts I thought you ment the starter was not working when bolted up. I thought you had taken it off the scooter to test, sorry

[snaker]

Oct 19, 2018 14:37:53 GMT -5 rancevas said:

Oct 19, 2018 9:19:08 GMT -5 ryan_ott said:

Just because the solenoid clicks doesn’t mean it’s passing voltage/current through it. You could check for continuity through it. Contacts can get corrosion on them. Check for voltage on the starter side of the solenoid. If ok check your grounds from the starter to the frame and battery.

So when the battery was connected to the scooter (and ignition button was pressed), I tested the the wires that go from relay (solenoid) to starter. There were two wires - red and black. My tester showed me that a current was passing through them of 13.5 V, as it should be. But when I connected those wires to the starter - it did nothing. And that's the weird part

So the relay (solenoid) shouldn't be the issue, since it passes voltage/current through it. But i will test it separately tomorrow, to be 100% sure.

I will double-check for corrosion and inspect every single wire separately. Also I'll check the grounds and tell you how it went.

In the meanwhile, got any other suggestions?

I wanted to confirm your description of the red and black wires routed between the solenoid and the starter. 

You sure the black wire isn't a switched hot and actually goes to the starter switch? If I read your post right your suggesting that the black wire is a ground to starter?

You appeared to have metered solid voltage under a load so the battery should be good.

Regardless, by your description the problem sounds like a bad wire or a bad connection.