Good question, I was wondering the same thing lol, see here......
http://www.kxriders.com/forums/index.php/topic,9145.0.html I ended up getting the kind that goes on behind the nut after ordering a wheeler whips on theat didn't fit and had to send back, it was the 27mm not the 32mm. I would still like to know if this fits, incase of breakage of what I have now. I called TM Designs and they said "look at a OEM schematic online somewhere, we don't make much K5 stuff because it doesn't sell". They were very unfriendly and short with me. Anyway, I looked the axle block part numbers up and they didn't match so I didn't order it.
Grey