Common Motor exclusive, Ikon inner front fork springs for your vintage Honda CB550 (K0-K2) & CB500T twin motorcycle.
Upgrading your rear shocks while leaving the front forks untouched is only half the job. If you’re planning a fork rebuild on your Honda CB550 (K0-K2) / CB500T, now’s the perfect time to step up your front suspension.
These high-performance fork springs from Ikon Suspension were developed in collaboration with Ikon in Australia specifically for the CB550 (K0–K2) and CB500T series of bikes. Exclusively available through Common Motor, these progressive wound fork springs deliver the same proven quality and performance riders have trusted from Ikon (formerly Koni) for decades - all while fitting seamlessly into your stock 35mm fork tubes.
Difficulty: Beginner
For the best install, we recommend changing your fork oil and rebuilding your forks at the same time.
Our Honda CB360 Fork Oil Change video walks you through how to perform a quick oil change while changing your fork springs.
As long as they are within their service limits (425 mm - 451.7 mm or 16.73" - 17.78" in free length), original fork springs can always be reused. However, our Ikon fork springs feature a progressive wind for better performance.
No, the Honda CB550F, later CB550Ks and early CB500Ks all used slightly different variations of internal fork springs.
Upgrading your internal fork springs and changing your fork oil to a modern 10W or 15W fork oil will have the most noticeable effect on the front suspension of your vintage Honda CB550 (K0-K2) / CB500T. Keep in mind that these upgrades are meant to improve your vintage suspension, not match a modern motorcycle with modern suspension.
Last updated: April 2026
