My first problem - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Transmission / Rear End
\ Chattering Clutch? Transmission Trouble?
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post #1 of 19 (permalink) Old 07-01-2011, 03:46 PM Thread Starter
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My first problem

I went for a ride today with no problems. WHen I get home I park the bike for 10 minutes and go back out to go for another ride. Bike starts no problem It wont shift out of first. as soon as I let the clutch out the rpm shoots up to 5000 but the motor is not going 5000. and bike stalls. I let the bike sit for 10 minutes running and problem went away. When I got back from another ride same thing but this time it wont go out of first with out stalling.

As soon as I let the clutch out a hair it stalls. any suggestions?

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post #2 of 19 (permalink) Old 07-01-2011, 04:19 PM
Giggity!
 
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post #3 of 19 (permalink) Old 07-01-2011, 04:39 PM Thread Starter
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No and I thought off that and tried to put it up and down a few times. but that is what our is acting like.

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post #4 of 19 (permalink) Old 07-01-2011, 04:53 PM
Giggity!
 
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Recently someone had that kickstand switch go bad. I don't remember the post or the conclusion but, I think the wires needed to be connected to test/bypass the switch. It's worth checking at least. The high rev has me curious though.
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post #5 of 19 (permalink) Old 07-01-2011, 05:05 PM Thread Starter
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But it is not actually revving the needle its just jumping

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post #6 of 19 (permalink) Old 07-01-2011, 07:14 PM
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Im not sure if you can compare this, but I had a 87 Camaro that was running rough and the tach was all over the place with engine staying the same. My book told me to check for leaking spark plug/coil wires. I started the car at night and it was a light show under the hood sparks jumping everywhere mainly from the coil wire. This almost dont sound like it could be your problem if your tach is just jumping to 5000 when you let out the clutch, that has me stumped. But something to think about. If you try this make sure you expose the coils so you can see. FYI my schematic shows the tach wired to the front ignition coil.

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post #7 of 19 (permalink) Old 07-01-2011, 08:32 PM
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clutch safety switch, side stand switch, and neutral switch are all tied into the ignition control box... theroteically if the Dieode inside the JB goes bad, it would cause the same symptoms you are describing...

...THE FALLOWING IS FOR TEST PURPOSES, PLEASE DO NOT LEAVE THE BIKE IN THIS CONDITION....

unhook the green wire coming out of the back side of the transmission, and place it to ground.
start your bike and see if you are still having issues. if this works, then you have a bad diode in the jb... if it does the same thing, start looking at the ignition coil as a possible problem.
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post #8 of 19 (permalink) Old 07-02-2011, 01:44 AM Thread Starter
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Anyone else? I think I am going to start with the kickstand switch. If not I think I have to take it to a shop since im not real mechanical.

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post #9 of 19 (permalink) Old 07-02-2011, 08:54 AM
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NOOOOOOO! do not just take it to a shop, please. You will have much less heartache if you attempt simple fixes yourself, a multimeter and small hand tools are all that is necessary for simple electrical problems please use the forum first, people here know more than any shop and have an easy solution. I have solved many problems following advice here first. Access to the electric on this bike is relatively easy a few screws gets you to most important electrics.

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Last edited by Puck; 07-02-2011 at 08:56 AM.
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post #10 of 19 (permalink) Old 07-02-2011, 09:03 AM
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Quote:
Originally Posted by Puck View Post
NOOOOOOO! do not just take it to a shop, please. You will have much less heartache if you attempt simple fixes yourself, a multimeter and small hand tools are all that is necessary for simple electrical problems please use the forum first, people here know more than any shop and have an easy solution. I have solved many problems following advice here first. Access to the electric on this bike is relatively easy a few screws gets you to most important electrics.
x2 as far as taking advice from the forum and trying to do the fix yourself. I also think it adds to your riding pleasure if you know you did your own work on the bike. JMO

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