
Manufacturer's ref: 412-4207C — Series 412 Cruiser Shock Absorber by PROGRESSIVE SUSPENSION. Designed for the Vintage/Classic, Touring, and Roadster categories, this shock and spring set is aimed at cruiser riders looking for a robust and tailored solution for their build.
The Series 412 shock absorbers are complete units with springs and chrome covers. They feature a gas-charged system and multi-stage speed-sensitive valves, mounted with a progressive winding spring. The preload adjustment is made via a 5-position cam, to adapt the stance according to load and passenger. Product made in the USA — recommended in Heavy Duty version for machines regularly operated near maximum load.
Before installation: if the length differs from the OEM, check the travel and clearances (swingarm, exhaust, chain/belt, tyre) to avoid any contact. Application examples: SUZUKI VS 1400 GLP Intruder, YAMAHA VMX-12 Vmax, HONDA VT 750 C2 ACE Shadow.