Found parts that work

Any one needing rebuild the calipers for a 1985 thur 1988 husky wr 430 the pistons and seals //// from a 1994 ktm 300 mxc 28 mm pistons and small and large seals will work match perfect about 55.00 dollars fropm ktm parts house will up date as work goes on

The 85-86 has two pistons one on each side of the disc. Are you sure those rebuild parts are the same?

Congratulations on figuring it out, I tried at bikebandit.com to see what they had, pistons are one part # a pair and the seals are a part# looks like four but I don't see the dust boots listed in the other place's temporary unavailable kit. Was a little more than you quoted.

Though I never bought one brake master cylinders and calipers were not all that expensive complete from one of the guys who opened up a small storefront with about three feet thickness of catalogs to order from. I think the internet has kind of put that kind of guy who never seemed to last too long out of business.

Fran