Bench Testing A Starter

eulark · April 24th, 2014, 05:03 PM

From what I can tell, the starter is internally grounded. So all you need to do is send 12v down the line and it turns on and starts spinning correct?

I checked and my battery has 12.4+/- .1 at rest. Crank is fine. Solenoid gets power. When cranking power is being sent to the tune of 12.1ish volts to the starter (checked on the starter terminal while cranking). So I pulled the starter and hooked a heavy cable to it, and then touched the other end of the cable to the + terminal on the battery. Nothing.

Did I miss something?

Just want to confirm before buying one.

(Also I noticed that mine says Mitsuba SM-14 12v. My other starter that I thought was the same is actually Mitsuba SM-07 12 V and doesnt actually fit right. Or at least wont sneak in without undoing the coolant hoses. Is it from a different bike completely or is it just an older one?)

Hoping to get a response quick so I can pull the trigger on one if I need to.

Thanks!

eulark · April 24th, 2014, 05:15 PM

Correction:

I realized that being internally grounded doesn't mean dont ground it when applying power. It means the chassis of the starter is the ground. So I just tested it off the battery again. First i did the SM-07, I hooked the ground cable to the bolt hole. And touched the positive terminal. Spinning and lots of pretty sparks. So I tried the SM-14 (the one orginally on my bike). Nothing and I saw a little spark when I touched the power to it. So...it's dead dead.

alex.s · April 24th, 2014, 05:21 PM

what is the resistance of the starter

are you able to turn the starter by hand?

Motofool · April 24th, 2014, 05:39 PM

Quote:

Originally Posted by eulark

...........Also I noticed that mine says Mitsuba SM-14 12v.........

The circuit is closed when electricity goes one brush - one coil - one brush.

Bad brushes-weak springs open the circuit: no electricity flow, no torque.

http://www.helwigcarbon.com/articles...s-it-work.html

Link to original page on YouTube.

eulark · April 24th, 2014, 05:40 PM

OHM set to 200 and showing 7-8.1

As I understand it, it should be reading zero. (It does on the good starter at least.)

And yeah it I can spin by hand. Its a little clunky, but I dont know how it should feel. The other feels clunky.

eulark · April 24th, 2014, 06:01 PM

This wouldnt have something to do with it would it?

Motofool · April 24th, 2014, 06:48 PM

Quote:

Originally Posted by eulark

This wouldnt have something to do with it would it?

Surely !!!

When they start going bad, there is a lot of electric arcs happening, which erode the copper of the collectors.

Could you use those parts from the other starter?

eulark · April 24th, 2014, 08:09 PM

Nope. Pulled the other one apart and completely different system in it.

April 24th, 2014, 05:03 PM	#1
eulark ninjette.org member Name: Cody Location: Wilmington, NC Join Date: Nov 2012 Motorcycle(s): 2003 Blue Ninja 250, 98 ZX6E, 06 ZX636 Posts: 249	Bench Testing A Starter From what I can tell, the starter is internally grounded. So all you need to do is send 12v down the line and it turns on and starts spinning correct? I checked and my battery has 12.4+/- .1 at rest. Crank is fine. Solenoid gets power. When cranking power is being sent to the tune of 12.1ish volts to the starter (checked on the starter terminal while cranking). So I pulled the starter and hooked a heavy cable to it, and then touched the other end of the cable to the + terminal on the battery. Nothing. Did I miss something? Just want to confirm before buying one. (Also I noticed that mine says Mitsuba SM-14 12v. My other starter that I thought was the same is actually Mitsuba SM-07 12 V and doesnt actually fit right. Or at least wont sneak in without undoing the coolant hoses. Is it from a different bike completely or is it just an older one?) Hoping to get a response quick so I can pull the trigger on one if I need to. Thanks!

April 24th, 2014, 05:21 PM	#3
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	what is the resistance of the starter are you able to turn the starter by hand? __________________________________________________

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April 24th, 2014, 05:15 PM	#2
eulark ninjette.org member Name: Cody Location: Wilmington, NC Join Date: Nov 2012 Motorcycle(s): 2003 Blue Ninja 250, 98 ZX6E, 06 ZX636 Posts: 249	Correction: I realized that being internally grounded doesn't mean dont ground it when applying power. It means the chassis of the starter is the ground. So I just tested it off the battery again. First i did the SM-07, I hooked the ground cable to the bolt hole. And touched the positive terminal. Spinning and lots of pretty sparks. So I tried the SM-14 (the one orginally on my bike). Nothing and I saw a little spark when I touched the power to it. So...it's dead dead.

April 24th, 2014, 05:40 PM	#5
eulark ninjette.org member Name: Cody Location: Wilmington, NC Join Date: Nov 2012 Motorcycle(s): 2003 Blue Ninja 250, 98 ZX6E, 06 ZX636 Posts: 249	OHM set to 200 and showing 7-8.1 As I understand it, it should be reading zero. (It does on the good starter at least.) And yeah it I can spin by hand. Its a little clunky, but I dont know how it should feel. The other feels clunky.

April 24th, 2014, 06:01 PM	#6
eulark ninjette.org member Name: Cody Location: Wilmington, NC Join Date: Nov 2012 Motorcycle(s): 2003 Blue Ninja 250, 98 ZX6E, 06 ZX636 Posts: 249	This wouldnt have something to do with it would it?

April 24th, 2014, 08:09 PM	#8
eulark ninjette.org member Name: Cody Location: Wilmington, NC Join Date: Nov 2012 Motorcycle(s): 2003 Blue Ninja 250, 98 ZX6E, 06 ZX636 Posts: 249	Nope. Pulled the other one apart and completely different system in it.