Oil screw compression spring set under the crankcase left 79-89

Spring with piston, screw and Oring at the bottom of the crankcase on the left side. from 1978-1989.

can also be used as a replacement in older models.

consisting of: 99906402602, 90012310630, 90110753100, 91110751200. can also be used with 964 and 993