Transmission shot.....I think - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Transmission / Rear End
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Rear End Woes? Splines Shot? Discuss it here!

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post #1 of 22 (permalink) Old 06-01-2016, 07:46 PM Thread Starter
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Unhappy Transmission shot.....I think

I have a 1994 vn750. I recently was driving my bike and just pulled out of a parking lot and shifted into 2nd. I tried to accelerate and I was just revving the engine. I thought I hadn't shifted high enough and got stuck in neutral. I shifted again and the same thing happened. I pulled over and learned that something in my transmission was terribly wrong. Nothing happened while I was sitting in Neutral but once I shifted into gear there is a loud grinding noise. I am fairly new to motorcycles and am trying to find videos and other resources to use to fix this myself. How big of a fix does this sound like? What is the likely cause of this? I could take it to a shop but I feel I would be paying more than I bought it for to fix the transmission. Any help would be appreciated!!!
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post #2 of 22 (permalink) Old 06-01-2016, 07:56 PM
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the tranmissions in these are very durable... the splines on the rear drive... not so much..

im betting rear splines are destroyed..

check the verses for the spline lube procedure, it will allow you to inspect them, and see if you have a bunch of rust colored dust instead of nice lubricated splines

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post #3 of 22 (permalink) Old 06-01-2016, 08:02 PM Thread Starter
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Thanks for the input. I will check that out. How big of a cost would it be to replace the rear splines if it was the cause?
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post #4 of 22 (permalink) Old 06-01-2016, 08:40 PM
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Thanks for the input. I will check that out. How big of a cost would it be to replace the rear splines if it was the cause?
If you watch ebay you can find driveshafts around $20 and final drives at $50-80. Of course many get listed a lot higher too.

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post #5 of 22 (permalink) Old 06-01-2016, 08:43 PM
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Also you gotta watch ebay, some salvage yards don't know what a good spline on a final drive looks like. There's one on there now that looks like it's shot. If you have any questions just post it on here and we'll let you know what we think.

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post #6 of 22 (permalink) Old 06-02-2016, 08:38 AM
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right, if you find one on ebay your interested in, post a link to it, we can help determine if its a usable part

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post #7 of 22 (permalink) Old 06-10-2016, 12:37 PM Thread Starter
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Splines Update

Alright I think the splines look to definitely be the problem but to my knowledge the coupling doesn't look that bad. I have attached photos of the parts from my bike. Any input would be appreciated. Thanks
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post #8 of 22 (permalink) Old 06-10-2016, 01:07 PM Thread Starter
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Replacement final drive

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Originally Posted by michiganteddybear View Post
right, if you find one on ebay your interested in, post a link to it, we can help determine if its a usable part
Here is a replacement final drive I am looking at, only charging $50 for it and it is from an '86. Look any good?
1986 Kawasaki Vulcan VN750 K536 Final Drive Rear Differential Diff | eBay
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post #9 of 22 (permalink) Old 06-10-2016, 02:54 PM
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post #10 of 22 (permalink) Old 06-10-2016, 03:19 PM
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If you look in the coupling you will see it's ground down. The outer most part is the only thing left. Yes, both shot.

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