Hot Cams 8.90mm Complete Valve Shim Kit HCSHIM00 — 4140 Steel, 0.04mm Increments (1.72–2.60mm)

The Hot Cams 8.90mm Complete Shim Kit HCSHIM00 is a full set of hardened 4140-steel valve shims in 0.04mm increments, designed to let you restore and tune valve clearances on a wide range of KTM four-stroke models from 2005–2017.

Keeping accurate valve clearances is essential for peak performance and engine longevity on KTM dirt and enduro bikes. This Hot Cams kit supplies three shims at every increment between 1.72mm and 2.60mm, laser-etched for instant size recognition. Forged from durable 4140 steel, these shims are sized specifically for 8.90mm shim-under buckets and are built to withstand frequent maintenance cycles.

Which KTM models are covered by this shim kit?

This kit fits many KTM four-stroke models across different years, including 250, 350, 450 and 500 series. Refer to the included model list to confirm compatibility for your exact year and model. If you run a popular SX-F, XC-F, EXC-F or EXC, this kit very likely matches your requirements.

• Compatible with KTM 250 SX-F (2005–2017) and 250 XC-F (2007–2017)
• Fits KTM 350 SX-F/XC-F/EXC-F series across 2011–2017 and 2012–2017 ranges
• Includes coverage for KTM 450 and 500 EXC, XC-W and SMR variants listed in kit documentation

How does the shim sizing and selection work?

Shims are supplied in 0.04mm steps, with three of each size to give flexibility when adjusting clearances. Laser etching on each shim lets you pick the correct thickness quickly during valve shimming. The three-per-size supply helps when small incremental combinations are needed to hit factory tolerances.

• Range: 1.72mm to 2.60mm in 0.04mm increments
• Three shims of every size for mix-and-match fine-tuning
• Laser-etched markings speed up selection under the bench light

What materials and durability features does this kit offer?

Hot Cams manufactures these shims from 4140 chrome-moly steel, a material chosen for strength and fatigue resistance under high valve-train loads. The forging process produces consistent thickness and roundness so each shim stacks predictably. Designed for routine maintenance, they resist wear and deformation better than softer alternatives.

• Forged from 4140 steel for improved strength and wear resistance
• Consistent dimensions for repeatable valve clearances
• Marked with laser etching to avoid ambiguity during installation

What tools and tips make installing these shims easier?

Basic valve service tools—feeler gauges, valve spring compressor, micrometer or thickness gauge—are all you need to use this kit properly. Work methodically: measure current clearance, calculate required shim thickness, and verify with a final run-in check. Keep used shims organized so you can reuse suitable pieces if still within spec.

• Use a micrometer to verify final shim thickness when combining shims
• Valve spring compressor and feeler gauges speed up safe disassembly and measurement
• Label shims you remove to track wear and possible reuse later

Who is this for? If you own a compatible KTM four-stroke from the listed years and do your own valve maintenance—or you’re a professional mechanic running frequent valve services—this Hot Cams shim kit gives a complete, durable, easy-to-identify selection of shims to hit factory-clearance tolerances. It’s best for riders and shops who want reliable, service-grade shims that simplify repeated adjustments without resorting to custom machining or mixed-material parts.