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| Electric Yamaha Electric Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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06-21-2015, 02:18 PM
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#1 |
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Not Yet Wild
Join Date: Dec 2010
Location: Loganville GA
Posts: 8
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2008 slow and jerky
2008 ydr , starts very jerky, then accelerates normal up to around 10 mph then slows to around 3-5 mph and constantly jerking, then surges for a few seconds and starts pattern all over again, battery 48 volt 6 / 8volt 51.4 after full charge and 24 hour rest period, they all read 8.5 date code B3
have not sure were to start looking ? thanks |
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06-24-2015, 08:00 AM
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#2 |
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Gone Wild
 Join Date: Sep 2010
Location: Florida
Posts: 1,895
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Re: 2008 slow and jerky
There is a wire coming off of the back cap of your motor that plugs into the main wiring harness with a three prong connector...this is for the speed sensor, make sure that is plugged in...if not it causes this problem.
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06-26-2015, 06:51 PM
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#3 |
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Not Yet Wild
Join Date: Dec 2010
Location: Loganville GA
Posts: 8
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Re: 2008 slow and jerky
Checked, it was plugged in, I unplugged and re-plugged to make sure I had a good connection, still no luck, doing the same thing. Thanks for the advice, I will keep testing and looking.
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06-26-2015, 06:55 PM
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#4 |
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Gone Wild
Join Date: Oct 2012
Posts: 1,733
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Re: 2008 slow and jerky
Send cgtech a private messege. He is the yamaha extradinaire on these forums.
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06-27-2015, 10:07 AM
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#5 |
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Sometime's............
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,874
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Re: 2008 slow and jerky
Take off the "motor sensor" and check to see if the magnet is cracked or broken.
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06-28-2015, 06:08 PM
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#6 |
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Not Yet Wild
Join Date: Dec 2010
Location: Loganville GA
Posts: 8
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Re: 2008 slow and jerky
magnet is fine, just finished checking it out I really thought is had something to do with speed sensor, it runs fine in reverse just forward is the problem, thanks for the suggestions
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07-03-2015, 09:54 PM
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#7 |
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Gone Wild
Join Date: Feb 2009
Location: Leighton,AL
Posts: 207
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Re: 2008 slow and jerky
Brushes in the motor are either stuck or worn out.
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07-04-2015, 01:51 AM
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#8 |
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Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: 2008 slow and jerky
I was thinking the same, next check is inside the motor...
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07-08-2015, 04:04 PM
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#9 |
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Not Yet Wild
Join Date: Dec 2010
Location: Loganville GA
Posts: 8
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Re: 2008 slow and jerky
Just got back in town from vacation, going to work on it a little tonight, will let you know what I find, thanks for the suggestions
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07-19-2015, 06:54 AM
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#10 |
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Not Yet Wild
Join Date: Dec 2010
Location: Loganville GA
Posts: 8
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Re: 2008 slow and jerky
Think it is the brushes, one brush was almost completely gone, the others looked fine, Thought that was kind of strange- cleaned everything up- re assembled runs better - but not great. Now the big question, were can I buy replacement brushes?
thanks |
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