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serioius problem w/ JM Star 150

 
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smallggrok



Joined: 29 Apr 2009
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PostPosted: Wed Apr 29, 2009 8:13 am    Post subject: serioius problem w/ JM Star 150 Reply with quote

alright so I just aquired a used 2006 JM star 150cc scooter for my wife. We test drove it once, and rode it home and everything worked fine. But when she tried to start it the next day it didnt. I came home from work as she was fiddling with it and tried my hand at it. The lights were comming on so there was some voltage in the battery. I tried starting it, and kickstarting it and nothing worked. It was late so I put it away for another day. The next day a buddy of mine who owns two bikes came over to look at it. He jumped it from his car, but had the car on. I was at work when this was going on so I didnt see or hear what happened but the scooter would still not start. When I got home I pulled the battery out and checked it with a multimeter. there was like 0.2 volts on it... so I try to charge the battery back up (keep in mind this battery was basically new when we bought the scooter). Anyway long story short I bought a new battery, charged it, and tried to put it in the scooter. when I touched the positive lead to the battery it was sparking, a lot, so much in fact it melted some of the lead to the terminal on the battery. In addition it sounded like the scooter was trying to turn over every time I tried to do this. Initially the kill switch was not in kill, but the key was not installed, and the scooter was in park. I took the kill switch to kill and it still did the same thing. I looked it over real quick for grounds but I didnt see anything obvious. if anyone has any idea what the problem could be I would really appreciate your help.


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yaz813



Joined: 24 Feb 2009
Posts: 289
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Location: Kansas City Mo. U.S.A.

PostPosted: Wed Apr 29, 2009 10:52 am    Post subject: Reply with quote

I am not sure of what the initial problem is. but if the car was running while trying to jump start the scoot then something in the electrical system of the scoot may now be cooked. to me it sounds like the starter solenoid may be shorted out or somehow damaged. oh and by the way it would help if you put your general location in your profile. it can help to get you better info from the group. Icon_icon_scooter-


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JDi



Joined: 08 Nov 2006
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PostPosted: Wed Apr 29, 2009 12:13 pm    Post subject: Reply with quote

Car alternators provide about 120 amps of juice, your scooter battery takes 4 amps. You've definitely fried something in the loom, and your symptoms sound very much like there's a short circuit.

Take all the panels off and trace the whole loom, you're looking for signs of melted insulation and any live wire that is touching the frame.

You'll probably also need a new regulator and rectifier, possibly stator windings too, but repair the frazzled loom first if it's repairable and then we shall see.



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chrisbwj



Joined: 21 May 2009
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PostPosted: Thu May 21, 2009 1:47 am    Post subject: Reply with quote

Where is the battery located on this scooter?


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threedogs61



Joined: 28 May 2008
Posts: 1955
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Location: North Brook, North Carolina, USA

PostPosted: Thu May 21, 2009 2:05 am    Post subject: Reply with quote

chrisbwj wrote:
Where is the battery located on this scooter?


The battery is located in the floor board where your feet rest. There is a little trap door that is held shut with a screw.



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'07 JMStar YY50QT-20 (Stolen @ 3700 miles)
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chrisbwj



Joined: 21 May 2009
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PostPosted: Thu May 21, 2009 3:23 am    Post subject: Reply with quote

Thank you! The manual kinda left that info out. Smile


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