Motorcycle Suspension Piston & Shaft Lock Nuts

All rebuildable motorbike front forks & rear shock absorbers need some basic shared parts - fasteners like locknuts to hold damping pistons to base towers, teflon lined shaft collars or acetal rod bushes to hold sliding tubes concentric without friction, mid-speed valve (or refill / non-return) springs to help tune your shim stack, rubber o-rings to keep oil & gas pressure sealed. These suspension components can be used on either end of the bike when you are servicing or tuning.

You can't use normal nuts for many shocks due to the constant vibration, you can't use loctite or nylocs either, due to the heat & oil. You need a special fujilok lock nut (or OEM equivalent) with a locking stainless steel spring insert. These locknuts are listed in their categories separately too; you can find the Shock Shaft Top Locknuts and the same parts are also in the Damping Piston Locknuts. There are also the Shock Shaft Bottom Lug Locknuts which bolt up the clevis or yoke.

Other shared components that are in both forks and shocks are shims & washers - but Teknik Motorsport have so many that we have our own Valving Shims section - including complete bulk kits, ring shims, check shims, cup washers and valve stop washers. If you need to swap damping shims please see our Shim Factor Calculator - a 0.30mm shim is NOT the same as two 0.15mm shims.

If you are a bike workshop or a DIY suspension tuner you should stock up on these essential wear parts - they are in everything and should be replaced every rebuild. We also have technical articles that can give you an edge: learn more about those lock nuts and fasteners or become an expert on oils with our suspension fluid weights table.