Clutch slipping when cold - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 14 (permalink) Old 06-16-2018, 09:21 PM Thread Starter
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Clutch slipping when cold

So i did an oil change on my new purchase. I used rotella 15w40 per forum recommendations. Now when cold my clutch slips in first gear. I didn’t ride the bike much at all before oil change. My friction zone is also at almost all the way out (away from bars) there is clutch cable slack at handle but none at all at transmission. Will adjusting the cable at the frame help with friction zone and maybe slippage? I don’t think clutch is worn i just hit 11000 miles and clutch will not slip at all in any other gear or when warm
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post #2 of 14 (permalink) Old 06-16-2018, 10:39 PM
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How far out is the adjuster at the lever? My clutch did the same, right after the first oil change. I wasn't sure if it had the wrong oil when I got it, and the clutch just needed time to soak in the Rotella, or the last adjustment I did cured it.

The procedure is in the manual for the cable adjustment, but check to see if the split in the release lever lines up with the ridge on the engine case.

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post #3 of 14 (permalink) Old 06-17-2018, 01:23 PM
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This is a common issue with all VN750s, referred to as "the coffee grinder" (search the forum for more info). It is due to cold oil sitting in the clutch basket. The Kawasaki recommended fix is to drill a series of holes in the clutch basket to allow the cold oil to drain out (see below). Storing the bike on the center stand helps a little. Pumping the clutch lever after the bike is started helps a little. The other option is to try other oils. I did not have the issue with Castrol dyno oil, but do have it with Rotella T6. I have adjusted to it since it goes away within a mile or two of riding.
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post #4 of 14 (permalink) Old 06-17-2018, 02:35 PM Thread Starter
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This is a common issue with all VN750s, referred to as "the coffee grinder" (search the forum for more info). It is due to cold oil sitting in the clutch basket. The Kawasaki recommended fix is to drill a series of holes in the clutch basket to allow the cold oil to drain out (see below). Storing the bike on the center stand helps a little. Pumping the clutch lever after the bike is started helps a little. The other option is to try other oils. I did not have the issue with Castrol dyno oil, but do have it with Rotella T6. I have adjusted to it since it goes away within a mile or two of riding.
Maybe i will try using castrol dyno oil next. It does go away within a few miles but didn’t do it before the rotella. It slips and grinds a little if the bike sits overnight i will also try pumping the clutch. Thanks for the input
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post #5 of 14 (permalink) Old 06-17-2018, 04:20 PM
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Rotella isn't making the clutch slip.

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post #6 of 14 (permalink) Old 06-17-2018, 05:20 PM Thread Starter
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Just tried a little experiment. Started the bike and tried to move it and got the slippage spoken of so i pumped the clutch about 15 times and tried again no slippage. I guess that will become part of my routine
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post #7 of 14 (permalink) Old 06-17-2018, 11:42 PM
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Quote:
Originally Posted by nhsmoker View Post
Just tried a little experiment. Started the bike and tried to move it and got the slippage spoken of so i pumped the clutch about 15 times and tried again no slippage. I guess that will become part of my routine
Did the clutch chatter when cold while slipping, sounding like a coffee grinder?

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post #8 of 14 (permalink) Old 06-18-2018, 06:25 AM Thread Starter
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Yes like a coffee grinder
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post #9 of 14 (permalink) Old 06-18-2018, 08:17 AM
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Coffee grinder and slippage are two different problems, at least on my bike. When I heard the coffee grinder it didn't slip, it did a wheelie, threw me off, and left without me. So now I pump the clutch lever.
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post #10 of 14 (permalink) Old 06-18-2018, 09:28 AM
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it did a wheelie, threw me off, and left without me.
Holy crap.
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