Decades on, the CT90’s original rear shocks sag and lose their damping, turning every bump and dirt road into a rough ride. These factory-style rear shocks are the OEM-style replacement for the Trail 90 — and unlike the originals on the early bikes, they’re adjustable. Sold as a pair.
As the original dampers wear, they lose their effectiveness — the ride goes spongy and harsh, and the back end stops settling over bumps. Our factory-style shocks restore a smooth, controlled ride and clean up the look of your CT90. They feature a standard spring-preload adjuster, so you can dial them in for your weight — unlike the rear shocks on the early CT90 (K0–K6), which weren’t adjustable.
Note — appearance: The early Trail 90 (K0–K6) used shocks with shrouds color-matched to the bike. These replicate the later K7–K9 factory shocks with exposed springs — so on an early bike they look a little different, but they fit and work just the same.
Difficulty: Beginner
Tools needed: Wrenches for the upper and lower mount nuts.
The preload-and-sag method in our rear-shock adjustment video applies here too — it’s filmed on a CB twin with a different style of adjuster, but the goal is the same: with you seated, set the preload so the shock compresses about a third of its travel.
Yes — they fit every CT90 / Trail 90 from K0 through K9 (1966–1978).
Yes. They have a standard spring-preload adjuster, so you can set them for your weight. The early CT90 (K0–K6) shocks weren’t adjustable, so these add that on the earlier bikes.
They replicate the later K7–K9 exposed-spring style rather than the early color-matched shroud, so they look a little different on a K0–K6 — but they fit and perform just the same.
Set the spring preload so the shock compresses about 20–30% of its travel with you seated, and tighten it for a heavier rider or when carrying a passenger.
Last updated: June 2026
