Another solution, attached drawing for chain slider bolt
bolt diameter of 14mm worked well on one bike and other needed to be slightly smaller 13.87mm....best to take measurement of old bolt for diameter prior to making
I've been using KTM # 79003053010 chain Sliding Kit Below Cpl.16
(also KTM bolt#0025080306 HH Collar screw M8x30 TX40 but may come with sliding kit 79003053010)
Been using this setup for about 4-5 years