Starter Motor

indr · 10-07-2012, 03:58 PM

I have it removed from the bike.

I want to connect it to a power source directly to see if it works.

There is only this one "connection" I can make to the motor:

Where do I hook up the other connection?

ragtoplvr · 10-07-2012, 04:01 PM

To the body of the starter.

I would take off the oring and clamp the jumper cable on the mounting nose. And hold the starter tight, they like to jump off tables, and out of hands, and get destroyed when they hit the floor. You drop one, you crack the magnets

Rod

indr · 10-07-2012, 04:06 PM

There was a spark and it shorted out the power supply I was using (no damage).

ragtoplvr · 10-07-2012, 04:18 PM

How big a supply. Small bike starters can draw over 100 amps inrush, 30 running free. One for a liter bike can be 200, 300 or more amps inrush, 75 amps running free. Your battery charger is not going to cut it.

Rod

buickid · 10-07-2012, 04:21 PM

Well they do take a fair bit of current to turn, so I'd expect a spark caused by large inrush current. How big is the power supply? It might not have shorted, just overloaded. The case is negative, that lug is positive. Make sure you're clamping only to the outer part of the lug and its not touching the casing.

indr · 10-07-2012, 04:24 PM

I'm using a 350W power supply unit from a computer.

anonny · 10-07-2012, 08:09 PM

(edit) After a reread this sounded a bit abrupt but wasn't meant to be....... but I cant find better words at the moment.

You realize the potential of what you are playing with.... right?

Why do you need to do this off the bike anyways? It already has everything you need.

indr · 10-07-2012, 08:17 PM

Quote:

Originally Posted by anonny

You realize the potential of what you are playing with.... right?

No...

:

Quote:

Why do you need to do this off the bike anyways? It already has everything you need.

I have the whole bike stripped for a all around cleanup and engine rebuild. Just trying to see how stuff works.

buickid · 10-07-2012, 09:25 PM

I'm not sure the PSU is enough. Use some jumper cables from a car battery. Inrush current on a starter can be huge and the PSU wires are quite small. Also, note that the PSU's 350W is spread across the 12 and 5V rails. You can't get 350W from the 12V rails alone, maybe 200 or so tops. The label on the unit will tell you what it can do.

indr · 10-07-2012, 09:27 PM

Don't have access to a car battery. I'll try it hooked up to the bike's battery tomorrow.

buickid · 10-07-2012, 09:48 PM

Great :)

10-07-2012, 03:58 PM	#1
indr ^OP Studly Adventurer Joined: Feb 2010 Location: BC Oddometer: 840	Starter Motor I have it removed from the bike. I want to connect it to a power source directly to see if it works. There is only this one "connection" I can make to the motor: Where do I hook up the other connection?

10-07-2012, 04:21 PM	#5
buickid Lets ride! Joined: Jul 2011 Location: Oahu, HI Oddometer: 309	Well they do take a fair bit of current to turn, so I'd expect a spark caused by large inrush current. How big is the power supply? It might not have shorted, just overloaded. The case is negative, that lug is positive. Make sure you're clamping only to the outer part of the lug and its not touching the casing. __________________ 2005 Yamaha Zuma YW50, 2009 Kawasaki Super Sherpa KL250

10-07-2012, 08:09 PM	#7
anonny What could go wrong? Joined: Mar 2007 Location: Beautiful Revelstoke BC Oddometer: 4,960	(edit) After a reread this sounded a bit abrupt but wasn't meant to be....... but I cant find better words at the moment. You realize the potential of what you are playing with.... right? Why do you need to do this off the bike anyways? It already has everything you need. __________________ Kawasaki H1 build thread 71- 450 Honda CL re & re Just another pathetic sheep following the herd

10-07-2012, 09:25 PM	#9
buickid Lets ride! Joined: Jul 2011 Location: Oahu, HI Oddometer: 309	I'm not sure the PSU is enough. Use some jumper cables from a car battery. Inrush current on a starter can be huge and the PSU wires are quite small. Also, note that the PSU's 350W is spread across the 12 and 5V rails. You can't get 350W from the 12V rails alone, maybe 200 or so tops. The label on the unit will tell you what it can do. __________________ 2005 Yamaha Zuma YW50, 2009 Kawasaki Super Sherpa KL250

10-07-2012, 09:48 PM	#11
buickid Lets ride! Joined: Jul 2011 Location: Oahu, HI Oddometer: 309	Great :) __________________ 2005 Yamaha Zuma YW50, 2009 Kawasaki Super Sherpa KL250

10-07-2012, 04:01 PM	#2
ragtoplvr Beastly Adventurer Joined: Oct 2007 Location: S. W. Mssouri Oddometer: 4,547	To the body of the starter. I would take off the oring and clamp the jumper cable on the mounting nose. And hold the starter tight, they like to jump off tables, and out of hands, and get destroyed when they hit the floor. You drop one, you crack the magnets Rod

10-07-2012, 04:06 PM	#3
indr ^OP Studly Adventurer Joined: Feb 2010 Location: BC Oddometer: 840	There was a spark and it shorted out the power supply I was using (no damage).

10-07-2012, 04:18 PM	#4
ragtoplvr Beastly Adventurer Joined: Oct 2007 Location: S. W. Mssouri Oddometer: 4,547	How big a supply. Small bike starters can draw over 100 amps inrush, 30 running free. One for a liter bike can be 200, 300 or more amps inrush, 75 amps running free. Your battery charger is not going to cut it. Rod

10-07-2012, 04:24 PM	#6
indr ^OP Studly Adventurer Joined: Feb 2010 Location: BC Oddometer: 840	I'm using a 350W power supply unit from a computer.

10-07-2012, 09:27 PM	#10
indr ^OP Studly Adventurer Joined: Feb 2010 Location: BC Oddometer: 840	Don't have access to a car battery. I'll try it hooked up to the bike's battery tomorrow.

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