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post #1 of 12 (permalink) Old 10-29-2013, 12:50 AM Thread Starter
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vn750 rpm guage

guage jumps around from 1000 to 3000 rpms at low rpm or high rpm it doesnt matter what rpm its turning. anyone have any idea what it could be?
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post #2 of 12 (permalink) Old 10-29-2013, 12:53 AM
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Could be a few different things, first check to make sure the rubber boot between the carbs and intake are tight. You can spray a little carbs cleaner in there while the bike is idling, if it receive up you have a leak.


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post #3 of 12 (permalink) Old 10-29-2013, 01:06 AM Thread Starter
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the engine doesnt idle up and down the tach is just flipping around
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post #4 of 12 (permalink) Old 10-29-2013, 01:09 AM
..have a vulcan good day!
 
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Originally Posted by candyman4092 View Post
guage jumps around from 1000 to 3000 rpms at low rpm or high rpm it doesnt matter what rpm its turning. anyone have any idea what it could be?
? ? ?
idk.... since it is electrical, I suggest check your grounds/electrical connectors.

hope this helps

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
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Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!

Last edited by WilliamTech; 10-29-2013 at 01:11 AM.
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post #5 of 12 (permalink) Old 10-29-2013, 01:15 AM Thread Starter
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thanks ill try that
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post #6 of 12 (permalink) Old 10-29-2013, 02:58 AM
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Check the connectors behind the left neck covers... Iirc, the red one is for the gauges, it could be lose or corroded. If the connectors ate fine, then I would look at the tachometer itself

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post #7 of 12 (permalink) Old 10-29-2013, 09:47 AM
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And check your battery terminals, they vibrate loose sometimes and that will do the same thing. Could be that easy.

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post #8 of 12 (permalink) Old 10-29-2013, 10:47 AM
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the Tach is electrical and runs off the front ignition coil signal.

Check your battery connections and grounds... frame to engine ground... and frame to battery ground straps.

Also check the front coil connections ...you should have 12V(battery voltage) on the coil primary and signal from the ignition to fire the coils.

also look at the connector under the cover for the tach signal like Slim said
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post #9 of 12 (permalink) Old 11-04-2013, 06:23 AM
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Originally Posted by gamefacebookdevelop View Post
At JC Whitney, we offer the best selection of Kawasaki VN750A Vulcan 750 Gauges & Gauge Brackets parts and accessories. We offer an industry leading 30-day Guarantee so that you can shop with confidence! Narrow your selection below by providing the year of your vehicle for a custom list of Kawasaki VN750A Vulcan 750 Gauges & Gauge Brackets products.
This sure seems like you did a cut and paste from the JCWhitney website or you are actually an employee of the customer service/sales department there. Your one and only other posting represents you as a VN750 owner. This is all a bit questionable and confusing. Most new members do not introduce themselves in such a manner. Please clarify your true status.

and always remember, "Ride until you rot!"
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but having to face the fact that this is a lifetime routine
going forward. Five operations done and it still continues.

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post #10 of 12 (permalink) Old 11-04-2013, 07:08 AM
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This sure seems like you did a cut and paste from the JCWhitney website or you are actually an employee of the customer service/sales department there. Your one and only other posting represents you as a VN750 owner. This is all a bit questionable and confusing. Most new members do not introduce themselves in such a manner. Please clarify your true status.
Spammarino

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