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Start ShoppingHot Cams 5PK748120 Shim Package Refills - Engine Performance Enhancer
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Description
Upgrade your engine's performance with Hot Cams' premium shim package refills. These essential components ensure precise valve clearance and long-term reliability for powersports engines. Ideal for racers and enthusiasts seeking maximum efficiency and durability.
Key Features
- High-Quality Materials: Precision-engineered shims made from durable alloys for consistent performance under extreme conditions.
- Universal Compatibility: Designed to fit a wide range of engine models, ensuring easy installation and broad applicability.
- Enhanced Durability: Resistant to wear and deformation, maintaining accuracy through thousands of engine cycles.
- Performance Optimization: Fine-tuned clearance specifications to improve engine efficiency and power output.
Why Choose This Product
Hot Cams' shim refills deliver unmatched reliability for powersports engines. By maintaining precise valve clearance, these shims reduce friction, enhance fuel efficiency, and prolong engine life. Whether you're modifying a high-performance motorcycle or maintaining a racing ATV, these refills provide the precision needed for peak mechanical performance. Their corrosion-resistant construction ensures long-term durability, while the streamlined design simplifies maintenance and installation. Trust Hot Cams to deliver components that meet the rigorous demands of serious riders.
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Upgrade your engine's performance with Hot Cams' premium shim package refills. These essential components ensure precise valve clearance and long-term reliability for powersports engines. Ideal for racers and enthusiasts seeking maximum efficiency and durability.
Key Features
- High-Quality Materials: Precision-engineered shims made from durable alloys for consistent performance under extreme conditions.
- Universal Compatibility: Designed to fit a wide range of engine models, ensuring easy installation and broad applicability.
- Enhanced Durability: Resistant to wear and deformation, maintaining accuracy through thousands of engine cycles.
- Performance Optimization: Fine-tuned clearance specifications to improve engine efficiency and power output.
Why Choose This Product
Hot Cams' shim refills deliver unmatched reliability for powersports engines. By maintaining precise valve clearance, these shims reduce friction, enhance fuel efficiency, and prolong engine life. Whether you're modifying a high-performance motorcycle or maintaining a racing ATV, these refills provide the precision needed for peak mechanical performance. Their corrosion-resistant construction ensures long-term durability, while the streamlined design simplifies maintenance and installation. Trust Hot Cams to deliver components that meet the rigorous demands of serious riders.
| SKU | GM49F700BB |
|---|---|
| MPN | 5PK748120 |
| Brand | Hot Cams |
| Category | Engine |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2009-2015 |
| Kawasaki | KX450F | 2010-2016 |
| Yamaha | YZF450 | 2008-2014 |
| Suzuki | RMZ450 | 2009-2015 |
| KTM | 450 SX-F | 2012-2018 |
Frequently Asked Questions
It is a Hot Cams valve shim refill card part number for 7.48 mm diameter valve shims. Each ‘5PK’ refill is a card of five hardened steel shims of a specific thickness, intended to replenish a Hot Cams 7.48 mm shim kit.
Fitment is not by vehicle model but by shim diameter. If your engine uses 7.48 mm diameter valve shims (common on many modern Japanese 250–450 motocross/enduro bikes and some sport bikes), this refill can be used. Confirm your OEM shim diameter in your service manual before purchasing.
If you do not already have a Hot Cams 7.48 mm shim kit or another assortment of shims, it is better to buy the full kit first. Refill cards like 5PK748120 are meant to replace frequently used sizes after you start to run low in your main kit.
Yes, you can generally mix Hot Cams hardened steel shims with OEM shims as long as they are the same diameter and thickness. Always verify thickness with a micrometer or calipers when in doubt.
No, they are not a performance modification by themselves. They are precision components used to set correct valve clearance. Performance gains come from having valve clearance within specification, not from the brand of shim.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 0 min
Tools Required
- Factory service manual for the specific vehicle
- Metric socket set
- Torque wrench
- Feeler gauge set (metric, in 0.01–0.02 mm steps)
- Magnetic pickup tool or small magnet (for lifting shims/buckets)
- Pick or small flat screwdriver (to help remove shims, where applicable)
- Calipers or micrometer (to verify shim thickness, optional but recommended)
- Clean shop towels and parts tray
Pro Tips
- Measure and write down each valve’s clearance and existing shim thickness before making any changes; build a simple chart.
- Turn the engine over slowly by hand (using the crank bolt) at least two full revolutions and recheck clearances before final assembly.
- Work on one cylinder or one cam at a time to reduce the chance of mixing parts.
- Lay out a labeled cardboard diagram for shim locations to stay organized.
- Lightly oil new shims before installation to prevent dry start on first startup.
Common Mistakes to Avoid
- Not consulting the OEM service manual for the correct valve-clearance specs and cam-timing procedure
- Mixing up cam caps, buckets, or shims between cylinders/valves
- Failing to record original shim sizes and measured clearances before changing shims
- Rotating the engine with cam caps loose or incorrectly torqued
- Dropping shims into the engine (through timing chain opening or oil return passages)
- Not rechecking clearances after installing new shims and turning engine over by hand
Comparison vs Stock/OEM
Functionally equivalent to OEM valve shims as long as the correct diameter and thickness are used. Designed as a cost-effective aftermarket alternative for routine valve adjustments.
Improvements
- Lower cost per shim compared with most OEM dealers
- Convenient refill format to restock frequently used sizes from a larger shim kit
- Standardized sizing compatible with Hot Cams shim kits and many OEM applications
Considerations
- Does not change performance on its own; proper valve-clearance setup is what matters.
- Must match OEM shim diameter (7.48 mm) and thickness; using incorrect size can damage the engine.
Durability & Warranty
Expected Lifespan
Intended to last the life of the valve-train components when valve clearances remain within specification. Shims are not regular wear items; they are only changed when adjusting clearances.
Warranty
Typical aftermarket parts warranty via the retailer or manufacturer (details vary by seller; usually limited against manufacturing defects).
Maintenance
No direct maintenance on the shim itself. Follow your vehicle’s recommended valve-clearance inspection intervals and re-shim only if clearances move out of spec.
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