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Start ShoppingHot Cams 5PK948230 Shim Package Refills - Engine Performance Enhancer for Powersports Vehicles
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Description
Upgrade your engine's performance with Hot Cams' precision-engineered Shim Package Refills. These essential components ensure optimal valve clearance adjustments, delivering improved power output, reduced wear, and long-term reliability for your powersports vehicle.
Key Features
- High-Precision Engineering: Manufactured to exact tolerances for seamless integration with Hot Cams engine systems.
- Durable Material Construction: Made from heat-resistant alloys to withstand extreme operating conditions and prolonged use.
- Universal Fit Compatibility: Designed for standard Hot Cams engine configurations to simplify installation and maintenance.
- Easy Installation: Pre-gauged shims reduce adjustment time and ensure accurate clearance settings.
- Performance Optimization: Enhances engine efficiency by maintaining proper valve clearance, maximizing horsepower and fuel economy.
Why Choose This Product
Hot Cams Shim Package Refills are trusted by racers and enthusiasts for their ability to deliver consistent performance gains. By maintaining precise valve clearance, these shims prevent overheating, reduce mechanical stress, and extend engine lifespan. Whether you're modifying a high-performance motorcycle or optimizing a utility vehicle, these refills provide a cost-effective solution for achieving peak engine operation.
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Upgrade your engine's performance with Hot Cams' precision-engineered Shim Package Refills. These essential components ensure optimal valve clearance adjustments, delivering improved power output, reduced wear, and long-term reliability for your powersports vehicle.
Key Features
- High-Precision Engineering: Manufactured to exact tolerances for seamless integration with Hot Cams engine systems.
- Durable Material Construction: Made from heat-resistant alloys to withstand extreme operating conditions and prolonged use.
- Universal Fit Compatibility: Designed for standard Hot Cams engine configurations to simplify installation and maintenance.
- Easy Installation: Pre-gauged shims reduce adjustment time and ensure accurate clearance settings.
- Performance Optimization: Enhances engine efficiency by maintaining proper valve clearance, maximizing horsepower and fuel economy.
Why Choose This Product
Hot Cams Shim Package Refills are trusted by racers and enthusiasts for their ability to deliver consistent performance gains. By maintaining precise valve clearance, these shims prevent overheating, reduce mechanical stress, and extend engine lifespan. Whether you're modifying a high-performance motorcycle or optimizing a utility vehicle, these refills provide a cost-effective solution for achieving peak engine operation.
| SKU | GMCC9B0BC9 |
|---|---|
| MPN | 5PK948230 |
| Brand | Hot Cams |
| Category | Engine |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R / CRF450X / CRF250R / CRF250X (and other Honda 4‑stroke models using 9.48mm shims) | 2005-2022 |
| Yamaha | YZF / WR 4‑stroke models (e.g., YZ250F, YZ450F, WR250F, WR450F) that use 9.48mm shims | 2002-2022 |
| Kawasaki | KX / KLX 4‑stroke models using 9.48mm shims | 2000-2022 |
| Suzuki | RM‑Z / DR‑Z and other 4‑stroke models using 9.48mm shims | 2000-2022 |
Frequently Asked Questions
No. 5PK948230 is a refill package for the Hot Cams 9.48mm shim kit. It contains selected sizes to replenish commonly used shims, not a full size range by itself.
Check your service manual or microfiche, or measure one of your existing shims with calipers. Most modern Japanese 250F/450F motocross and off‑road 4‑strokes use 7.48mm or 9.48mm shims—this pack is only for 9.48mm applications.
Yes. Hot Cams shims are hardened precision steel and are compatible with OEM shims as long as diameter and thickness match. Keep good records of what is installed at each valve.
You need standard hand tools, feeler gauges, and ideally a micrometer or caliper. Some models also require a valve shim tool to depress buckets; others require removing the cams. Follow your service manual.
This specific part number is a packaged refill assortment. Individual shim sizes are usually sold under separate Hot Cams part numbers or by OEM dealers.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 0 min
Tools Required
- Metric socket set
- Torque wrench
- Feeler gauge set
- Calipers or micrometer (to verify shim thickness)
- Magnet or pick tool (for lifting shims and buckets)
- Factory service manual for torque specs and valve clearances
- Clean shop rags and parts tray
Pro Tips
- Measure every shim you install with a micrometer even if it is marked – markings can be worn or mismatched.
- Lay out a diagram of the head and write down each valve’s original clearance and shim size before changing anything.
- Only work on a completely clean engine top end; blow off dirt before removing valve cover.
- Turn the engine over by hand several revolutions after reassembly and re‑check clearances before first start.
- Replace or at least inspect cam cap bolts and threads—stripped cam caps are common on high‑hour engines.
Common Mistakes to Avoid
- Mixing up shim locations and not recording original sizes
- Not rotating the engine to base circle of each cam lobe before measuring clearance
- Dropping a shim into the engine and not retrieving it properly
- Reusing dirty shims or work area contamination leading to cam lobe/bucket scoring
- Failing to re‑torque cam caps to spec and in the correct pattern
Comparison vs Stock/OEM
Functionally equivalent to OEM shims but sold in economical multi-size packs instead of single pieces.
Improvements
- Much lower cost per shim compared to OEM individual shims
- Convenient assortment of sizes to fine‑tune valve clearances in one job
- Consistent hardened steel construction suitable for high‑RPM 4‑stroke engines
Considerations
- You must verify you have the correct diameter (9.48mm) for your engine.
- Does not include every possible thickness—intended to top up the most common sizes in the primary kit.
Durability & Warranty
Expected Lifespan
Under normal conditions a correctly sized hardened shim will typically last the life of the valve and bucket; shims are rarely a scheduled wear item.
Warranty
Hot Cams generally offers a standard manufacturing‑defect warranty; specific terms vary by retailer.
Maintenance
Periodically check valve clearances per your service schedule; replace shims only when clearances drift out of spec or if any surface damage is visible.
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