Sticking primary weights.
This governor bracket and spring assists the return of the primary weight.
A common aftermarket fix is to install a spring inside the governor body. This approach often fails because the spring jams in the bore. The Sonnax governor bracket and spring kit 32204-03K is designed so the spring is outside the governor body, safely returning the governor valve to the at-rest position at stops.
If weight has a through bore, use the 9-coil light spring, not the heavy spring. It is recommended to use a PTFE seal ring since cast-iron rings can contaminate governor.
Contact a Sonnax Parts Distributor.