
Progressive Suspension — Series 412 Shock Absorber (manufacturer part no. 412-4204C)
Designed for heavy cruisers and touring bikes, these Series 412 shock absorbers combine robust design with practical adjustments. Gas (nitrogen) charged with multi-stage speed-sensitive valves, they automatically adjust to road conditions. Supplied as complete sets with progressive wound springs and chrome covers, they offer a balance between comfort for two and road handling for long rides and luggage transport.
Before installation, check the travel and clearances (swingarm/axle, exhaust, chain/belt, tyre) if the length differs from OEM. Compatible or frequently fitted on models such as KAWASAKI VN 1600, HONDA VT 1100 C2, and KAWASAKI VN 1500 FI, these shock absorbers are suitable for riders seeking durability, simple adjustment, and reliable performance over long distances.