Ikon Rear Shocks | Honda CB350 / CB360 / CB450 / CB550
Tired rear shocks bounce over every bump and let the back end wallow through corners. Ikon rear shocks are the top of our suspension lineup — a rebuildable, fully adjustable upgrade we run on our own bikes. Sold as a pair.
Why You Need This
We tried our share of "performance" rear shocks for the CB350, CB360, CB450, and CB550 before Ikon, and none felt worth the money until these. After more than 10,000 cumulative miles across several road trips, the difference was night-and-day — enough that the whole crew here runs Ikon on their personal bikes. It’s the single best performance upgrade we’ve made.
Features
- Fully rebuildable — the body, valving, seals, and oil can all be serviced rather than tossed
- Three-position spring preload to set ride height and sag for your weight
- Four-position rebound damping on the Fully Adjustable version — control how fast the shock returns to rest, with no bulky external reservoirs
- Stock-style look, in a black or chrome body
Pick the style that suits your setup: the Fully Adjustable shock adds four-position rebound control on top of the spring preload (black or chrome body), while the Basic Adjustable is built to the same standard with spring preload only.
About Ikon
Ikon Suspension builds these in Australia, and the company traces its roots to the old Koni racing shocks from the golden days of motorcycle racing. Every Ikon shock is 100% rebuildable, and Common Motor is an authorized Ikon service center — so when they eventually wear, they get rebuilt, not thrown away.
Specifications
| Spec | Detail |
|---|
| Replaces OEM Parts | 52400-286-670XW, 52400-455-670XW, 52400-317-670XW, 52400-317-700XW, 52400-369-000, 52400-458-670, 52400-292-670XW, 52400-390-681XW, 52400-323-010XW, 52400-318-670, 52400-456-670 |
| Fits Models | CB350 / CL350 (1968–1973), CB360G / CB360T (1974–1976), CL360 / CJ360T (1974–1977), CB450 K1–K7 / CL450 K1–K6 (1968–1974), CB500K (1971–1973), CB500T (1975–1976), CB550K / CB550F (1974–1978) |
| Sold As | Pair (one left, one right) |
Dimensions
| Measurement | Value |
|---|
| Eyelet to Clevis Eyelet (center-to-center) | 12.52" (318 mm) |
| Upper Eyelet ID | 0.63" (16mm) |
| Upper Eyelet Width | 1.02" (26mm) |
| Clevis Inside Width | 0.75" (19mm) |
| Clevis Bolt Thread | M10 x 1.25 |
Note: These use a 0.63" (16mm) upper eye. Our factory-style CB350–CB550 shocks use a smaller 9.5mm upper eye — a different mount, so the two aren’t interchangeable at the top.
Installation
Difficulty: Beginner
Tools needed: Wrenches for the upper and lower mount bolts.
- Bolt the shocks on with the eyelet end up and the clevis end down.
- Set the rider sag. Total travel runs from where the chrome piston exits the body up to the rubber bumper just below the top eye. With you seated on the bike, aim for about a third of that travel compressed, and adjust the spring preload to get there.
- On the Fully Adjustable version, match the rebound to the spring: if the spring is on position 3, set the rebound to 3 or 4; spring position 2, rebound 2–3; and so on.
Our rear-shock adjustment video walks through setting preload and sag.
Our rear-shock overview video shows the Ikon’s rebound adjustment and a full rebuild.
Frequently Asked Questions
What’s the difference between the Fully Adjustable and Basic versions?
Both are built to the same standard with three-position spring preload. The Fully Adjustable adds four-position rebound damping — control over how fast the shock returns to rest — and comes in a black or chrome body. The Basic Adjustable has the spring preload only.
Are these rebuildable?
Yes. Every Ikon shock is 100% rebuildable — the body, valving, seals, and oil can all be serviced — and Common Motor is an authorized Ikon service center, so they can be rebuilt rather than replaced when they wear.
Will these fit my bike?
They fit the CB350 / CL350 (1968–1973), CB360 / CL360 / CJ360 (1974–1977), CB450 / CL450 (1968–1974), CB500K (1971–1973), CB500T (1975–1976), and CB550 / CB550F (1974–1978). For the smaller CB175 / CL175 / CB200 twins, use our Ikon CB175 / CB200 shocks.
How do I set them up?
Set the spring preload so the shock compresses about a third of its travel with you seated, then match the rebound to the spring position (spring 3 → rebound 3–4, and so on). Tighten the preload for a heavier rider or when carrying a passenger.
What’s the difference between these and the factory-style shocks?
The factory-style shocks are a straightforward stock replacement. These Ikon shocks are the rebuildable, adjustable upgrade — adjustable rebound and preload, fully serviceable. They also use a larger 16mm upper eye (the factory-style uses 9.5mm), so the two are a different mount at the top.
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Last updated: June 2026
