Speedometer flucuating - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 05-24-2010, 08:18 PM Thread Starter
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Speedometer flucuating

Been searching the forum and havnt seen this one yet so Ill post...I have a 95 VN750 with 35,000 miles. This is my first season with it. I have noticed as I'm getting used to the bike that my speedometer needle flucuates as its climbing from 0mph up to about 30mph then evens out and is steady after that thruout the rest of the range. Meaning the needle is bouncing up and down as the bikes speed is increasing until it hits 30 or so then it gets rock steady. During the winter I cleaned and lubed the speedo unit on the front wheel and also lubed the cable, previous owner said cable is newer as he didnt check the tightness of the nut and left it on the highway somewhere...any ideas on if this is the wheel unit, cable or speedometer unit?

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post #2 of 7 (permalink) Old 05-24-2010, 08:26 PM
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Originally Posted by RHoschett View Post
Been searching the forum and havnt seen this one yet so Ill post...I have a 95 VN750 with 35,000 miles. This is my first season with it. I have noticed as I'm getting used to the bike that my speedometer needle flucuates as its climbing from 0mph up to about 30mph then evens out and is steady after that thruout the rest of the range. Meaning the needle is bouncing up and down as the bikes speed is increasing until it hits 30 or so then it gets rock steady. During the winter I cleaned and lubed the speedo unit on the front wheel and also lubed the cable, previous owner said cable is newer as he didnt check the tightness of the nut and left it on the highway somewhere...any ideas on if this is the wheel unit, cable or speedometer unit?
Lube the cable, but I am certain it's the spedo.

If it was the drive gear it would be constant.


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post #3 of 7 (permalink) Old 05-24-2010, 09:13 PM
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I go with Lance, you already lubed and cleaned the cable, and I am sure you did not find any broken strands. The speedo is old and worn out.

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post #4 of 7 (permalink) Old 05-24-2010, 11:46 PM Thread Starter
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I did do as Lance suggested, removed the cable and cleaned and inspected it, looks ok. Wouldnt say it was dead dry but I was surprised it was as grease free as I found it, I re- lubed it with black moly as I re-inserted it and made sure the key end was coated well that goes in the wheel end. Just finished test ride and remarkably improved. Still have minor oscillation from 0-10 but it steadys out after 10mph or so and stays solid after that. I think thats the best I can do for now unless I throw money or parts at it. Do you think removing the speedometer gear housing and cleaning/greasing it will do any better?

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post #5 of 7 (permalink) Old 05-25-2010, 09:22 AM
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I was told once not to use moly to lube the speedo cable. Suggested white lithium grease. Don't know if it would make that much difference. It could be that the wire internal cable is just a fraction too short or too long and binds just a little until you reach a certain speed. Just speculating! It wouldn't hurt to buy another one and see. If it didn't solve it, there will be someone here within the month needing one...

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post #6 of 7 (permalink) Old 05-25-2010, 06:58 PM
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Speedo cables should be greased with wheel bearing grease not lithium. Moly grease should be fine, if a bit overkill.


I would really not worry about the whole thing if it seems to work fine once you reach 10mph. I would wager the odds of you getting a ticket for going 7mph in a 5 mph zone are insanely small.

Who looks at their speedo at 0-10 mph anyway?


Likely just clunky worn gears, my advice is to forgitaboutit.


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post #7 of 7 (permalink) Old 05-28-2010, 03:31 PM Thread Starter
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Just doing short "feeler cruises" prior to my trip with the bike west during the summer. Had the black moly left over from the spline lube so said "why not? Nah, I dont look at it much either, took me two months to catch it on sunday on a 175 miler but I want it to be as pristine as possible on a 2200 mile trip...

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Saddleman Explorer seat
Kurykan ISO grips
Garmin GPS ram mount
Knifemaker floorboards
Auburn Leather Frontier saddlebags
Fire and Steel saddlebag brackets
OEM turn signal relocation kit
Enkei chrome valve cores and caps
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Signal Dynamics voltage LED
Metzeler ME880 110/90H-19 front
Metzeler ME880 170/80HB-15 rear
K&N air filters
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