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HomePRODUCT NEWSPARTS & SERVICINGYSS Performance Fork Parts for Suspension Workshops

YSS Performance Fork Parts for Suspension Workshops

Many budget middle weight bikes still come with damper rod forks. This design is cheap to make but harks back many decades. Performance is always a compromise, as there is no separation of high & low speed damping. This can give harshness over rough surfaces or a mushy feel on smooth roads.

Larsson offers the professional suspension workshop a great range of proven YSS tuning products. These can help you provide customers with real performance improvements for damper rod forks. As well as listing fitments for many bikes, we have ‘Advanced Searches’ enabling you to select appropriate parts for many more, by searching using technical specifications such as component dimensions.

YSS Fork Caps with Pre-load
Larsson have fantastic YSS Fork Caps with preload adjustment. The key benefit is adding these can help set the correct suspension sag, according to rider weight/ bike loading. This in turn will help optimise suspension performance & give the best steering response.

The Fork Caps are made in precision machined aluminium. As well as adding functionality, they will enhance the looks of any bike. We have bike specific versions, but we’ve also created an ‘Advanced Search’ feature, allowing you to match dimensions to find a suitable fitment for many other bikes.

Examples include:

743.10.12 FORK CAP YSS
Fits BMW F650GS Twin 800cc

743.09.98 FORK CAP YSS
Fits Harley Davidson XL1200C Sportster Custom

See all YSS Fork Caps HERE

YSS Fork Valves
Damper rod forks are always a compromise between getting the ideal damping response on high and low speed suspension motion. This can lead to a ‘basic’ feel, appearing harsh over bumps &/or ‘mushy’ on smooth roads. YSS fork valves add a progressive action to the damping allowing forks to respond to high-speed movement (like hitting a pothole) while giving a controlled feel during gentle travel. This gives the fork a taut feel without loss of comfort. And allowing the fork to respond correctly to different surfaces keeps the tyre on the road reducing braking distances and improving steering feel.

The valves come in sizes suitable for many fork tubes and fit between the damper rod and fork spring, and it is normally necessary to enlarge the compression orifice of the damper rod when fitting. The valves come preset according to the fork size, but fine-tuning on the valve is possible.

Examples include:

773.05.01 FORK VALVE – YSS 335
Fits Yamaha MT07 2014-21

789.06.94 FORK VALVE KIT YSS 425
Fits Harley Davidson VRSCA 1130 V-Rod 2002-07

See all YSS Fork Valve Kits HERE.

Larsson also offer a wide range of YSS linear & progressive springs, plus model specific YSS Fork Upgrade Kits that combine adjustable fork cap, fork valve, spring, spacer tube (if needed) & fork valve.


To apply for a Larsson Trade Account please click HERE.


Larsson UK Ltd.

7 Alpha Court
Phoenix Parkway
Tel: +44 1536 265633
Fax: +44 1536 210390
Email: [email protected]


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