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Start ShoppingHot Cams 7.48mm Shim Refills - 5-Pack Valve Shim Kit Refills for Engine Adjustment
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Description
Achieve perfect valve clearance with Hot Cams' specialized 7.48mm shim refills. These precision-ground hardened steel shims are designed for high-performance engines, ensuring smooth operation and extended valve train life. Perfect for riders who demand accuracy and reliability from their powersports equipment.
Key Features
- Exact Shim Diameter: 7.48mm precision-ground diameter for seamless compatibility with Hot Cams valve kits
- Single Thickness Precision: 2.60mm uniform thickness for precise valve clearance adjustment
- Durable Hardened Steel: Wear-resistant material ensures long-lasting performance under extreme engine conditions
- Convenient 5-Pack Format: Pre-measured refills simplify maintenance without compromising accuracy
- Blister Card Packaging: Protects delicate shims while ensuring easy storage and access
Why Choose This Product
These specialized refills are engineered for riders who prioritize engine efficiency and reliability. The hardened steel construction withstands high temperatures and mechanical stress, while the exact 7.48mm diameter ensures perfect fitment with Hot Cams' shim-under-bucket valvetrains. The single-thickness design eliminates guesswork during adjustments, saving time and reducing maintenance complexity. Whether you're tuning a high-performance motorcycle or ATV, these shims deliver the precision needed for optimal valve train performance.
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Achieve perfect valve clearance with Hot Cams' specialized 7.48mm shim refills. These precision-ground hardened steel shims are designed for high-performance engines, ensuring smooth operation and extended valve train life. Perfect for riders who demand accuracy and reliability from their powersports equipment.
Key Features
- Exact Shim Diameter: 7.48mm precision-ground diameter for seamless compatibility with Hot Cams valve kits
- Single Thickness Precision: 2.60mm uniform thickness for precise valve clearance adjustment
- Durable Hardened Steel: Wear-resistant material ensures long-lasting performance under extreme engine conditions
- Convenient 5-Pack Format: Pre-measured refills simplify maintenance without compromising accuracy
- Blister Card Packaging: Protects delicate shims while ensuring easy storage and access
Why Choose This Product
These specialized refills are engineered for riders who prioritize engine efficiency and reliability. The hardened steel construction withstands high temperatures and mechanical stress, while the exact 7.48mm diameter ensures perfect fitment with Hot Cams' shim-under-bucket valvetrains. The single-thickness design eliminates guesswork during adjustments, saving time and reducing maintenance complexity. Whether you're tuning a high-performance motorcycle or ATV, these shims deliver the precision needed for optimal valve train performance.| SKU | GMBF8A1BDF |
|---|---|
| MPN | 5PK748260 |
| Brand | Hot Cams |
| Category | Engine |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Multiple Brands | Various 4-stroke motorcycles/ATVs with Hot Cams camshaft kits | 2004-2024 |
| Honda | CRF450R/RX, TRX450R | 2005-2020 |
| Yamaha | YZF450, WR450F, YFZ450 | 2004-2019 |
| Kawasaki | KX450F, KVF450 | 2003-2022 |
Frequently Asked Questions
5PK748260 is a refill pack of 7.48 mm diameter valve shims in a single thickness (2.60 mm) with 5 pieces per pack.
No. Hot Cams shim package refills are single-size packs intended to restock an existing Hot Cams shim kit. Each pack contains 5 shims of one thickness value.
They will fit many modern Japanese 250–450 four-stroke motocross and off-road bikes as well as some street models that use 7.48 mm shim-under-bucket valves. You must confirm your OEM shim diameter and thickness from your service manual before ordering.
Beyond basic hand tools you will need feeler gauges and a torque wrench. A micrometer or digital caliper is strongly recommended to confirm shim thickness, and a magnet pick-up tool makes shim removal easier.
No. Hot Cams offers multiple shim diameters (e.g., 7.48 mm, 9.48 mm, 8.90 mm, etc.). 5PK748260 is specifically for 7.48 mm systems; verify which shim diameter your engine requires.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 0 min
Tools Required
- Service manual for the specific vehicle
- Metric socket set
- Torque wrench
- Feeler gauges (metric)
- Micrometer or digital caliper (to verify shim thickness)
- Magnet pick-up tool or valve shim removal tool
- Clean shop towels
- Marker and notepad for recording clearances
Pro Tips
- Lay out cams, caps, and shims on a labeled piece of cardboard to keep everything organized by cylinder and valve (IN/EX)
- Use a micrometer to verify shim thickness even if it is labeled—this helps maintain consistent, accurate valve clearances
- Work on one cylinder at a time to reduce the chance of mixing parts
- Always turn the engine over by hand (using the crank bolt) after reassembly to confirm there is no binding before starting
- Record final shim sizes and clearances; this will make the next valve adjustment much faster
Common Mistakes to Avoid
- Mixing up cam caps or camshafts and not reinstalling them in the original orientation
- Failing to record original valve clearances and shim sizes before changing shims
- Not rotating the engine through at least two full revolutions and re-checking clearances after installation
- Dropping a shim into the engine and not accounting for it before reassembly
- Incorrect torque on cam cap bolts, risking thread damage or cam journal distortion
Comparison vs Stock/OEM
Functionally equivalent to OEM valve shims in size and function, made from hardened steel for use in shim-under-bucket valvetrains.
Improvements
- Cost-effective alternative to purchasing individual OEM shims
- Available in convenient multi-packs for commonly used sizes
- Works seamlessly with Hot Cams shim kits for easier inventory management
Considerations
- Must match the OEM shim diameter (7.48 mm in this case)
- Always verify thickness and clearances to factory specs regardless of brand
Durability & Warranty
Expected Lifespan
Intended to last the life of the valve train under normal use when installed and lubricated correctly; typically only replaced when changing valve clearances, not due to wear of the shim itself.
Warranty
Standard Hot Cams limited warranty (terms vary by seller; typically covers defects in materials and workmanship).
Maintenance
No direct maintenance; inspect and measure shim thickness during valve clearance checks and keep valvetrain properly lubricated with clean engine oil.
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