Quad bike valves and parts

Identify the component and its position

An inlet valve, exhaust valve, guide, spring and shim are separate buying choices. Match the full model, year and variant, then check any position or specification notes for the exact part. For a modified cylinder head, use the specification of the fitted components as well as the original vehicle details.

Check quantities and supporting parts

Read whether the listing supplies one item or a set, and which components a kit includes. For valves or springs intended for a particular engine configuration, confirm the manufacturer's matching-component requirements. Browse cams and parts for camshaft-related work, or valves and cams for the wider category.

How do I choose between inlet and exhaust valves?

Match the position named in the listing to the valve required for the engine. Check the exact reference and any dimensions or material specification provided. Do not choose by appearance or assume that two valves listed for the same vehicle serve the same position.

Does a valve kit include springs, guides and seals?

Use the contents list for that specific kit. A valve or spring kit name does not establish that every cylinder-head component is included. Compare the stated quantity and components with the parts needed before ordering anything separately.

What should I check before choosing a shim kit?

Check the required shim diameter and thickness range against the kit specification, then read the quantities supplied in each size. Choose from the engine's specified requirements; the number of shims in a kit alone does not establish whether it suits the job.

Can I choose valve springs by vehicle model alone?

Check the spring specification and the manufacturer's requirements for the valves and camshaft being used, particularly on a modified engine. A vehicle match is the starting point; confirm any required retainers or other matching parts from the exact spring-kit information.