Hot Cams 9.48mm Valve Shim Refill Kit - 5-Pack for Engine Performance

Name: Hot Cams 9.48mm Valve Shim Refill Kit - 5-Pack for Engine Performance
Brand: Hot Cams
SKU: GMED9943BF
Price: 8.99 USD
Availability: InStock

Description

Upgrade your engine's valve train precision with Hot Cams' 9.48mm diameter shim refill kit. These 5-piece shims are engineered for seamless integration with Hot Cams valve kits, delivering reliable performance and extended engine life for riders demanding peak power and efficiency.

Key Features

9.48mm Diameter: Precision-machined for perfect fit with Hot Cams valve adjusters
Thickness Range: 1.20–3.50mm in 0.05mm increments for precise valve clearance adjustment
Hardened Steel Construction: Durable, wear-resistant material for long-lasting performance
Bucket-Style Compatibility: Designed for bucket/shim-under-bucket valve adjusters
Convenient Packaging: Small labeled bag or blister card for easy storage and use

Why Choose This Product

These premium shims offer unmatched accuracy for valve train maintenance, ensuring optimal engine performance and reliability. The 5-piece refill format simplifies restocking for mechanics and enthusiasts, while the precision-ground steel construction resists deformation under high engine loads. Perfect for maintaining peak power delivery and fuel efficiency in high-performance engines.

SKU: GMED9943BF

MPN: 5PK948310

Category: Engine

Brand: Hot Cams

Stock: In Stock

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Key Features

9.48mm Diameter: Precision-machined for perfect fit with Hot Cams valve adjusters
Thickness Range: 1.20–3.50mm in 0.05mm increments for precise valve clearance adjustment
Hardened Steel Construction: Durable, wear-resistant material for long-lasting performance
Bucket-Style Compatibility: Designed for bucket/shim-under-bucket valve adjusters
Convenient Packaging: Small labeled bag or blister card for easy storage and use

Why Choose This Product

SKU	GMED9943BF
MPN	5PK948310
Brand	Hot Cams
Category	Engine

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Frequently Asked Questions

It includes 5 valve shims of identical thickness, all 9.48 mm in diameter, intended to refill or top off a Hot Cams 9.48 mm shim kit.

These are 9.48 mm diameter shims used on many modern 250–450 motocross bikes, off‑road bikes, and some sport ATVs. You must confirm your engine uses 9.48 mm bucket/shim valve adjusters in your service manual or parts fiche.

Yes, if you already know the thickness you need and your engine uses 9.48 mm shims. Most people first buy a full Hot Cams shim kit, then use these refills for commonly used sizes.

Beyond normal hand tools, you need a feeler gauge set and ideally a micrometer or caliper to verify shim thickness. Some engines also require a shim removal tool, but many just need basic tools once the cams are removed.

Yes. As long as the shim surface is not pitted, cupped, or damaged and the thickness is still within spec, they can be reused. Inspect each shim during valve service.

Installation Guide

Difficulty Medium

Est. Time 1 hr 0 min

Tools Required

Service manual for specific motorcycle/ATV
Metric socket set
Torque wrench
Feeler gauge set (metric)
Micrometer or digital caliper (to verify shim thickness)
Magnet pick-up tool or shim removal tool
Pick or small flat screwdriver
Clean shop rags and parts tray
Permanent marker and notepad for recording clearances

Pro Tips

Measure every shim with a micrometer even if it’s labeled; record the real value in your notes.
Work on one cylinder or one pair of valves at a time and keep shims laid out in a labeled container (IN/EX, cylinder #).
Stuff a clean rag around the cam chain opening to prevent dropped shims from falling into the engine.
Always turn the engine over by hand at least two full revolutions and re-check clearances before final button‑up.
Use assembly lube on cam lobes and journals during reassembly, and torque cam caps in the exact sequence and specs from the manual.

Common Mistakes to Avoid

Not recording original shim sizes and valve clearances before swapping shims
Mixing up shims between valves or cylinders
Failing to rotate the engine to the correct TDC position for each cylinder before measuring clearances
Dropping a shim into the engine (cam chain cavity or crankcase)
Not re-checking clearances after reassembly
Re‑using old cam cap torque specs from memory instead of the service manual

Comparison vs Stock/OEM

Functionally equivalent to OEM valve shims in size and usage but sold as aftermarket refills.

Improvements

Lower cost per shim compared to many OEM dealers
Convenient 5-pack of a single size to replenish frequently used shim values
Compatible with common Hot Cams shim kits for easier inventory management

Considerations

Always verify diameter (9.48 mm) and thickness against OEM specs before installation
Does not include the wide size assortment of a complete shim kit; this is only a single-size refill pack

Durability & Warranty

Expected Lifespan Typically lasts through many valve service intervals; shims are hardened and do not normally wear quickly when clearances are kept in spec.

Warranty Coverage is generally limited to manufacturing defects; specific terms vary by retailer and Hot Cams policy.

Maintenance Inspect shim faces whenever valves are serviced; replace any shim that shows pitting, cupping, or unusual wear. Maintain proper oil quality and change intervals to protect valve train components.