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Posted by chief
 - August 31, 2023, 17:12:42 PM

Do you know if the clutch springs and holders have been upgraded from originals?  Kaw originally shipped our bikes with a single holder and a weak clutch spring which caused slipping pretty quickly.  The link below is for that mod. Using the current batch of holders and spring works well. Did mine about 2005... no problems since.

Have you changed the oil using only recommended oils?  Any oil with friction modifiers will cause problems for Drifters.

Here's some history and mod on how to do it.

https://www.vulcandrifterriders.com/clutchspringreplacement.html

Posted by OR Seedman
 - August 29, 2023, 11:41:33 AM

Have you changed the oil yet?  could be old oil or bad friction plates...or a combination of both.  I would try an oil change first if you haven't done so already.  If it still does it, then most likely you need new plates.....relatively inexpensive and fairly easy to do if you have any wrenching experience.  I would upgrade the pressure plate at the same time..

Posted by Petersoned96@gmail.com
 - August 28, 2023, 20:19:51 PM

I just purchased a 99 1500 Drifter, #126 with 34,000 miles. It is slipping when I accelerate in all gears. Could it be the wrong oil or is the clutch bad? Any ideas? 

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