how to change final drive oil, (lube) - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 42 (permalink) Old 12-17-2007, 12:34 PM Thread Starter
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how to change final drive oil, (lube)

Have a 1989 Vulcan 750 A-5 and I recently pulled back the boot on the drive shaft showing the u-joint area! it was dry so I greased it with moly 60, as for the final drive area can you just drain it,and then refill where that little screw is on top (allen screw)? and if so what kind of lube do I use? I only have 8800 miles on this bike. Should I also remove the rear tire and re-grease the other end of the spline?

1989 Vulcan 750 A-5 (Champ) Black,Chrome
Texas VROC#25628, SEtx PGR, Texas Patriots, Riders of Texas
Bought 8600 miles now 11,400miles & Counting
www.TheBaytownHandyman.com

Last edited by buffalo bill; 12-17-2007 at 12:37 PM.
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post #2 of 42 (permalink) Old 12-17-2007, 01:09 PM
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Fergy has an excellent write-up on the spline lube
http://pages.tstar.net/~fergy/writeu...al_drive1.html
As far as the front splines in front of the universal, don't be alarmed since these don't get much movement and a spray of white lithium is all they really need. The moly will do fine too since you have fone that. The biggest concern as far as splines are the ones conneted with the pinion gear at the final drive "pumpkin". Fergy's write-up will step you through that.

You really need to get a service manual and one is available online here
http://www.tocmanufacturing.com/Products.htm
scroll down until you see
Other Links:

Link to VN700/750 Service Manual in PDF format (WARNING 117MEG file) click here

Right click the underlined here and do a "Save as" to download the manual to your PC.

Dianna
Conway, AR
Patriot Guard Rider
2000 VN750 Sere (Serendipity)
1990 GL1500 (Ole Blue)
1986 VN750 EVie (project bike, heavy custom)
VROC # 11628 / 25000-H
ARVROC # 12 Coordinator and Crowd Control
OKVROC # 18 (H)
TNVROC # 45 (H)
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post #3 of 42 (permalink) Old 12-17-2007, 10:19 PM
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Drain with the small plug on the bottom. Fill through the large plug above the small one. Make sure you can remove the large plug before you drain the fluid.
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post #4 of 42 (permalink) Old 01-27-2008, 08:38 PM
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Step 1 - Warm up the vehicle by driving it for 5-10 minutes. This will help the oil drain more quickly. CAUTION - Exhaust and other parts of the bike may be extremely hot.

Step 2 - Support the vehicle on its centerstand.


Step 3 - The final gear case access is located on the left rear.


Make sure to place a drain pan in position, then remove the filler plug. I used an adjustable wrench for this, as I'm not sure what socket fits this plug. It's at least a 23 or 25 mm, which unfortunately I don't have. If not using a socket, take care not to damage the bolt.


Step 4. The drain plug is located on the left, at the very bottom of the gear case.

Remove the drain plug (10 or 12mm socket). It also contains a small aluminum washer, make sure not to lose this. If it is in any way damaged be sure to replace it.

Step 5 - Allow the oil to drain completely. You may wish to spin the rear wheel in reverse to ensure all oil has been drained.

Step 6 - Replace the drain plug and fill the gear case with the appropriate amount and viscosity of oil. The manual recommends:

150 ML of API GL-5 hypoid gear oil. When above 41 degrees F, use SAE 90. Below 41 us SAE 80. The manual also indicates a GL-6 gear oil may be used.

I opted for a multi-weight, 75W-90, Mobil 1, as I do plenty of riding in both kinds of weather.



If you were located in sunny CA you might want to opt for the higher oil year round. Use your own best judgment as to what kind of conditions you actually ride in.

Step 6. Replace the filler plug. Be sure to wipe up any stray drops of oil from your rims, and avoid contact with the braking system. Take the bike for a short test drive and inspect for leaks.

Final drive oil should be replaced every 7,500 miles, or more often depending on your riding style.
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post #5 of 42 (permalink) Old 01-29-2008, 06:15 PM
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Great tutorial!

Harvey,

From one who is "mechanically challenged", thank you for a great tutorial. The '01 I bought came without ANY records, and while it had had 9400 miles on it and looked as if it was extremely well taken care of, I'm getting ready to change this, and your pics have been a great help - very clear!

jon

west chester, PA

newbie
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post #6 of 42 (permalink) Old 03-21-2009, 04:18 PM
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Just found this thread and it was a great help for me. I wasn't sure how to drain the final drive oil. This post was perfect. Thanks "Harvey birdman" for your help.

Mark

Enon, Ohio

Mark
2005 VN750
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post #7 of 42 (permalink) Old 03-21-2009, 07:12 PM
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You've been digging around in the basement it seems.

Have you looked through the Vulcan Verses yet? Alot of good stuff in there too.
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post #8 of 42 (permalink) Old 03-21-2009, 07:15 PM
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Like Harvey I also use the 75-90W Mobil 1 Synthetic...
Have a good one...Old Dog...

Southern Central Tennessee.......
Now on the Dark Side......
Girl's Bike 09 Sporty xl 1200 Custom...33k + & clickin......
Sportster Owner/Rider since age 72...lol... Rider since Simplex...???
09-xl1200 "C" Vivid Black, Cast wheels w/19" Frt., SE-Stage 1+, X14iEDs...
MicroTach +, Higher wider H-bars, GPS Mt., Mustach bar Hwy. pegs...
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post #9 of 42 (permalink) Old 03-24-2009, 06:51 PM
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75 W 90? thats synthetic! you should use the Hypoid gear oil it calls for thats 80W90
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post #10 of 42 (permalink) Old 03-24-2009, 09:53 PM
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Quote:
Originally Posted by fiendclub36 View Post
75 W 90? thats synthetic! you should use the Hypoid gear oil it calls for thats 80W90
Awww, I'm a warm weather rider, don't ride when the temp is below 50* so the 75 vs 80w don't bother me...
BTW-Whats that yellow oil filter on yours, didn't know maw Kaw. called for the new PureOne oil filter on the VN750...lol...
Just kidding, have a good one...Old Dog...

Southern Central Tennessee.......
Now on the Dark Side......
Girl's Bike 09 Sporty xl 1200 Custom...33k + & clickin......
Sportster Owner/Rider since age 72...lol... Rider since Simplex...???
09-xl1200 "C" Vivid Black, Cast wheels w/19" Frt., SE-Stage 1+, X14iEDs...
MicroTach +, Higher wider H-bars, GPS Mt., Mustach bar Hwy. pegs...
Viking Shock cutout Saddlebags, Rear Mt. Signal Lt. Kit, Fork Brace...
RoadKing Air Shocks, Mustang Seat, Progressive Fork Springs...
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