The original clutch in the klx with the big bore didn't last long when my wife was shifting gears like in the video.

 

Good to know. How much was the clutch kit?
My bike had 7900 miles on it when I installed the 351 and it has never had a single problem except the gears slipped now and then but once I went to non Synthetic it has yet to slip.
Ohenry

 

When they do start slipping - do yourself a favor and get the EBC dirt racer clutch kit, and purchase the Barnett spring set seperately.

The EBC clutch and the Barnett springs were the best combo I found when I had the 351. The stock springs or EBC springs would hold for a little while, but start slipping failry soon. The Barnetts held till the discs were shot.

The EBC clutch kit is around $70, and I think the springs were $20-$25

 

Love that stiff clutch pull (two finger clutch) does not slip at all!!!

 

Yeah what Larry said, ebc springs were sacked out in no time. Barnett springs have been very reliable, no breakage yet