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Discussion Starter #1
I take my bike to work and today I was going home and I got up to about 70's on the freeway and for like on second the whole bike lost power. I felt a surge and the speedo dropped off to zero and the the I got the power back. I reduced speed a little and then throttled back up to about 70 and all was well for a bit and it did it again.

I am going to look at the battery connections tonight. Any other things I should be looking for?
 

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Good start with battery and at starter & grounds. Look for some wire chafing. There might be some stickys in electrical section help you track it down. Some one here a similar problem to bad I cant remember the out come. Good Luck.
 

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Mississippi Cajun
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Well given the two options, electrical is the place to start. Grounds are finicky little gremlins, so make sure any you find are good. I've fixed more than a few similar issues with finding/fixing (very slightly) corroded grounds. the more I read these posts and the more I work with bikers here (in a very highly "salted" environment on the Gulf Coast) the more I find the corrosion under connectors. Nowadays, most functions on the later model scoots are electronic, and a bad ground can make life a bad day for us.

And for a Public Service announcement (AGAIN) dielectric grease is NOT a cure all for electrical problems. Dielectric is an electrical term that means insulating. Thus, dielectric grease is an insulating lubricant. DO NOT us dielectric grease to enhance or otherwise facilitate electrical circuits.
 

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Ignition was another thing on the list but that wouldn't affect the speedo would it?
If the motor acts like the ignition cuts out, and the speedo drops to zero ; look at the connection block where the sub harness from the motor connects to the main harness. One or more of the pins in that block are losing contact . I've had this same thing happen more than one time to a few I've looked at . I've replaced any questionable pins and sockets , packed with dielectric grease, reconnected block together . No more problems.

The key question here is this : The speedo has to drop to zero all at once. ( at times the other dash gauges will also drop off too ) If it does not, this is not the fix for your problem .


:coffee:
 

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What gear were you in?
 

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Just Ride
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Ignition switch can cause this problem also.
 

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Discussion Starter #12
If the motor acts like the ignition cuts out, and the speedo drops to zero ; look at the connection block where the sub harness from the motor connects to the main harness. One or more of the pins in that block are losing contact . I've had this same thing happen more than one time to a few I've looked at . I've replaced any questionable pins and sockets , packed with dielectric grease, reconnected block together . No more problems.

The key question here is this : The speedo has to drop to zero all at once. ( at times the other dash gauges will also drop off too ) If it does not, this is not the fix for your problem .


:coffee:
I will check this. As far as I could tell the speedo dropped to zero but like I said it was like one second that this happened and when I looked down the speedo was going back to 70. I don't know if it "zeroed out"
 

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I will check this. As far as I could tell the speedo dropped to zero but like I said it was like one second that this happened and when I looked down the speedo was going back to 70. I don't know if it "zeroed out"
Thats close enough, look at the pins and sockets closely. You may want to pull and "wiggle" the plug as the motor idles to see if it will cut out on you.
If you look in the wiring diagrams, you will see what pins and sockets control what functions.

:coffee:
 

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HD had/has a recall on some bikes cutting out when low on fuel. The tank fuel sensor or something like that has to be replaced because it was making the bike think it was out if gas before it actually was. This was/is a safety issue as you can imagine. You weren't low on fuel by chance were you?


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Discussion Starter #16
HD had/has a recall on some bikes cutting out when low on fuel. The tank fuel sensor or something like that has to be replaced because it was making the bike think it was out if gas before it actually was. This was/is a safety issue as you can imagine. You weren't low on fuel by chance were you?


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I just filled up and the freeway was the next exit so I had plenty of fuel. I am going to do an early morning ride to see if I can replicate the issue. And then do all the checks starting with battery.
 

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:popcorn
 

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After I hit 70 ish I hit 6th gear but it did the same thing at 65 in 5th gear

Cool. I was wondering if maybe you hit the limiter. It's a strange feeling if you have never done it. Similar to what you describe.
 

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Cool. I was wondering if maybe you hit the limiter. It's a strange feeling if you have never done it. Similar to what you describe.
No warning on that limiter. just silence right now.:eek
 
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