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Start ShoppingHot Cams 5PK748145 Shim Package Refills - High-Performance Engine Enhancements
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Description
Upgrade your engine's performance with Hot Cams' 5PK748145 Shim Package Refills. These high-quality shims are designed to enhance engine efficiency, reduce wear, and deliver consistent power output for riders who demand reliability and performance.
Key Features
- Precision-Engineered Design: Manufactured to exact tolerances for optimal engine alignment and reduced vibration.
- High-Durability Materials: Made from premium alloys to withstand extreme temperatures and high-stress environments.
- Universal Compatibility: Fits most standard engine configurations for easy installation and broad application.
- Seamless Integration: Designed to work with existing engine components without requiring major modifications.
Why Choose This Product
Whether you're tuning a high-performance motorcycle or maintaining a reliable ATV, these shims offer a cost-effective way to improve engine efficiency. Their durable construction ensures long-term performance, while the precise engineering helps maintain optimal compression ratios. Hot Cams' reputation for quality ensures these refills deliver consistent results, making them a trusted choice for serious riders and mechanics alike.
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Upgrade your engine's performance with Hot Cams' 5PK748145 Shim Package Refills. These high-quality shims are designed to enhance engine efficiency, reduce wear, and deliver consistent power output for riders who demand reliability and performance.
Key Features
- Precision-Engineered Design: Manufactured to exact tolerances for optimal engine alignment and reduced vibration.
- High-Durability Materials: Made from premium alloys to withstand extreme temperatures and high-stress environments.
- Universal Compatibility: Fits most standard engine configurations for easy installation and broad application.
- Seamless Integration: Designed to work with existing engine components without requiring major modifications.
Why Choose This Product
Whether you're tuning a high-performance motorcycle or maintaining a reliable ATV, these shims offer a cost-effective way to improve engine efficiency. Their durable construction ensures long-term performance, while the precise engineering helps maintain optimal compression ratios. Hot Cams' reputation for quality ensures these refills deliver consistent results, making them a trusted choice for serious riders and mechanics alike.| SKU | GM7E1F3507 |
|---|---|
| MPN | 5PK748145 |
| Brand | Hot Cams |
| Category | Engine |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2002+ |
| Honda | CRF250R | 2004+ |
| Honda | CBR600RR/CBR600F family | 2001+ |
| Yamaha | YZF-R6 / YZF-R1 and various WR/YZ four-strokes | 1998+ |
| Kawasaki | KX250F / KX450F and multiple Ninja 4‑stroke models | 2004+ |
| Suzuki | RM-Z250 / RM-Z450 and various GSX‑R models | 2004+ |
Frequently Asked Questions
This is a refill pack for engines that use 7.48 mm diameter bucket shims. Check your OEM parts fiche or service manual for shim diameter. If it lists 7.48 mm shims, this pack will physically fit; you still need to confirm that the thickness range (1.45–2.10 mm) covers the sizes required for your engine.
5PK748145 is a refill kit for the Hot Cams 7.48 mm master shim kit. It includes multiple pieces of each size from 1.45 to 2.10 mm but is intended to replenish commonly used sizes, not to replace the main organizer kit.
Retailers and users report that Hot Cams shims are hardened, precision-ground, and function equivalently to OEM valve shims in terms of fit and durability when installed and maintained correctly.
Yes, you can mix Hot Cams shims with OEM shims as long as the diameter and thickness are correct. Many technicians do this routinely when adjusting valves.
You don’t need a special ‘shim tool’ for most modern engines, but you do need standard hand tools, a torque wrench, feeler gauges, and ideally a micrometer or caliper for measuring shims. Always follow the procedure in the factory service manual.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 30 min
Tools Required
- Service manual for your specific bike/ATV
- Metric socket set
- Torque wrench
- Feeler gauge set (metric)
- Shim micrometer or caliper (to verify shim thickness)
- Magnetic pickup tool or small magnet
- Pick or small screwdriver (for lifting buckets, where applicable)
- Clean shop towels
- Assembly lube or clean engine oil
- Permanent marker and notepad (to track shim locations and clearances)
Pro Tips
- Lay out a diagram of your cylinder head and write valve clearances and shim sizes for each valve before swapping anything.
- Work on one cylinder at a time and keep old shims in a labeled organizer so you can reuse them on other valves if the math works.
- Always confirm new shim thickness with a micrometer, even though they’re labeled – it catches rare mismarks or mix‑ups.
- Lightly coat shims and bucket tops with clean engine oil or assembly lube during installation to prevent dry start wear.
- Turn the engine over by hand two full revolutions and then recheck all valve clearances before final assembly.
Common Mistakes to Avoid
- Not confirming that the engine actually uses 7.48 mm shims before ordering.
- Mixing up shim locations and not recording original shim sizes and valve clearances.
- Measuring valve clearances on a hot engine instead of cold as specified in the manual.
- Rotating the engine with cams or caps not torqued correctly, risking cam or bucket damage.
- Dropping shims into the engine and not retrieving them before reassembly.
- Not rechecking clearances after installing new shims.
Comparison vs Stock/OEM
Functionally equivalent to OEM 7.48 mm valve shims in size and hardness, designed as a cost-effective alternative for repeated valve adjustments.
Improvements
- Provides a wide range of shim sizes in one kit, unlike OEM shims that are often sold individually.
- Refill pack format reduces cost per shim compared to buying OEM pieces one at a time.
- Convenient organization by size to speed up valve adjustment work.
Considerations
- Does not change engine performance on its own; performance gains result from having valve clearances correctly set, not from the brand of shim.
- You must verify that the 1.45–2.10 mm range meets the needs of your engine; some OEM setups may use shims outside this range.
Durability & Warranty
Expected Lifespan
Comparable to OEM valve shims when clearances are checked and maintained on schedule; typically lasts the service life of the engine under normal use.
Warranty
Standard Hot Cams limited warranty as provided by the manufacturer (terms not fully detailed on retailer pages).
Maintenance
No direct maintenance; durability depends on following the recommended valve clearance inspection intervals and maintaining clean engine oil.
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