PROOTOM OTOM D7.48mm Adjustable Valve Shim Kit – 141pcs (1.20–3.50mm)

Overview

The PROOTOM OTOM D7.48mm Adjustable Valve Shim Kit is designed for precise maintenance of valve clearance on popular 250cc off‑road bikes. It brings a complete range of shim sizes into one durable, easy‑to‑store package, so you can tune engine feel and consistency with confidence.

What’s inside the kit

• Diameter 7.48 mm; thickness from 1.20 to 3.50 mm in 0.05 mm increments, with 3 shims per size, totaling 141 pieces across 47 specifications.
• Durable carburizing steel construction for long‑lasting performance under regular maintenance.
• Includes a valve gasket kit to support complete valve service sessions.
• Packed in a sturdy box for organized storage and easy transport to the pit or shop.

Compatibility and fitment

Designed to suit all Japan‑market 250F off‑road models, including popular bikes from Honda, Kawasaki, Suzuki, and Yamaha. The broad size range and precise increments make it suitable for a variety of valve clearances encountered during routine maintenance.

Why riders choose this kit

• Extensive size range (1.20–3.50 mm) with fine 0.05 mm steps supports careful, incremental dialing of valve clearance.
• Large selection (141 pieces) and 47 distinct specifications help you cover common service scenarios without reordering mid‑job.
• Carburizing steel shims offer reliable durability, reducing the need for frequent replacements during ongoing maintenance.
• A dedicated gasket kit is included, offering everything you need for a complete valve service in one package.

Usage notes

During maintenance, consult your service manual to determine the target clearance and select the closest shim size in 0.05 mm steps. Regular checks help keep engine timing and valve action consistent, while the included gasket kit supports secure resealing after service.