K-Tech Front Fork Valve 33.50mm Kit for Yamaha YZF-R3 (2015-2018) YSS-335

If you spend long hours in the saddle on your Yamaha YZF-R3, the stock fork damping can leave you fighting for confidence and comfort through corners. The K-Tech PD Flow Control Valve 33.50mm Kit (part number YSS-335) is a precision-engineered upgrade that transforms the feel of your 41mm fork — delivering all-day composure, reduced fatigue and far greater chassis control whether you are commuting or carving mountain roads.

Key Features

• PD Flow Control Valve sized at 33.50mm, purpose-built for the 41mm fork fitted to the Yamaha YZF-R3 2015-2018
• Precise damping control rebalances fork response, smoothing out the harshness that erodes rider confidence on longer rides
• More consistent chassis stability under braking and through fast direction changes, so the front end tracks exactly where you intend
• Engineered by K-Tech — a suspension specialist with over 15 years of competition experience translating race-derived technology to road applications
• Direct-fit kit designed exclusively for the YZF-R3 (15-18); no modification required to the fork legs themselves

All-Day Comfort and Suspension Performance

The Yamaha YZF-R3 is a capable machine, but its factory fork valving is a compromise that suits a wide range of riders rather than optimising for any one of them. Riders who cover real miles quickly notice that the stock setup lacks progressive damping: it can feel vague at low speed and abruptly stiff when the road surface deteriorates. The K-Tech 33.50mm flow control valve addresses this directly.

By regulating oil flow through the fork more accurately, the valve allows the suspension to stay more compliant over successive bumps and undulations — the kind of sustained surface noise that builds fatigue on touring roads or long commutes. The result is a noticeably more planted, flowing ride character that lets you stay focused and comfortable mile after mile rather than tensing against a nervous front end.

Track-Proven Engineering for the Road

K-Tech's background is in competitive suspension development, and the YSS-335 valve kit reflects that heritage. Every component is manufactured to close tolerances, and the 33.50mm valve diameter has been selected specifically to match the internal geometry of the R3's 41mm fork, ensuring the flow characteristics work in harmony with the existing spring rate rather than fighting it. The upgrade requires no permanent modification, preserving the option to return to standard if needed.

Installation Note

Installation of this kit requires specialist tools and techniques to ensure both performance and safety. K-Tech strongly recommends that the work is carried out by an authorised K-Tech Service Centre.

Fitment and Compatibility

This kit fits the following motorcycle:

• Yamaha YZF-R3 — model years 2015, 2016, 2017, 2018 (41mm fork)

Specifications