Wiseco VSK4 – Valve Shim Kit 8.90 mm
Product Overview
Wiseco VSK4 is a comprehensive set of 8.90 mm adjustment shims designed for precise valve-clearance tuning in four-stroke motorcycle and ATV engines as well as selected automotive powerplants (e.g., BMW S54). Every shim is through-hardened and ground to an OEM-plus finish, so it maintains true thickness under repeated thermal and mechanical stress.
Key Features
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Full spread of 23 thicknesses from 1.72 mm to 2.60 mm in 0.04 mm steps.
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Three pieces of each size—a total of 69 shims—enough to set an entire cylinder head without re-ordering.
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8.90 mm outer diameter matches factory tappets in KTM, Husqvarna, GasGas and other brands.
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Hardened, precision-ground steel ensures minimal wear and repeatable measurements during future adjustments.
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Supplied in a compartmented organizer with clearly labelled bins for quick size identification at the bench or in the pits.