All the 199 B`s I have seen all have no cutaway for the hub to miss the fork leg, the same as the 199 A`s. It will also help your axle clamp if you line the slot or cut in the spacer up with the slot in the fork leg. All of the Bultaco off road bikes (that I have seen) came with two fork seals in each side. Use seals off a KTM SX 65 2002 to 2009. With these seals you only need one a side. The last Sherpa`s used what ever parts they could find so they might have had any Betor legs on them. I think the SWM`s with Betor forks only had pinch bolts on one side too. Graham.