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Start ShoppingHot Cams 9.48mm Valve Shim Refill Pack - High-Performance Engine Kit Replacement
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Description
Upgrade your engine's performance with Hot Cams' premium valve shim refill pack (5PK948290). This essential component ensures precise valve clearance adjustments for high-performance engines, maintaining optimal power delivery and reliability. Perfect for mechanics and riders seeking to maintain peak engine efficiency.
Key Features
- 9.48mm Diameter: Precision-fitted for Hot Cams valve shim kits to ensure proper valve clearance and engine performance.
- 0.025mm Thickness Increments: Fine-tuned thickness options allow for precise adjustments to match engine specifications.
- Refill Pack Design: Designed to replenish existing Hot Cams 9.48mm shim kits, ensuring cost-effective maintenance without replacing the entire kit.
- High-Quality Materials: Durable, corrosion-resistant shims for long-lasting performance in demanding riding conditions.
Why Choose This Product
Hot Cams valve shim refills deliver unmatched precision for engine tuning, ensuring your powersports vehicle maintains peak performance. The 9.48mm diameter and incremental thickness options provide the flexibility needed for both stock and modified engines. As a refill pack, it offers a cost-effective solution for maintaining your Hot Cams kit without purchasing a complete set. Ideal for riders who prioritize engine efficiency and reliability, these shims help prevent valve train issues and ensure smooth, powerful operation across a range of riding conditions.
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Upgrade your engine's performance with Hot Cams' premium valve shim refill pack (5PK948290). This essential component ensures precise valve clearance adjustments for high-performance engines, maintaining optimal power delivery and reliability. Perfect for mechanics and riders seeking to maintain peak engine efficiency.
Key Features
- 9.48mm Diameter: Precision-fitted for Hot Cams valve shim kits to ensure proper valve clearance and engine performance.
- 0.025mm Thickness Increments: Fine-tuned thickness options allow for precise adjustments to match engine specifications.
- Refill Pack Design: Designed to replenish existing Hot Cams 9.48mm shim kits, ensuring cost-effective maintenance without replacing the entire kit.
- High-Quality Materials: Durable, corrosion-resistant shims for long-lasting performance in demanding riding conditions.
Why Choose This Product
Hot Cams valve shim refills deliver unmatched precision for engine tuning, ensuring your powersports vehicle maintains peak performance. The 9.48mm diameter and incremental thickness options provide the flexibility needed for both stock and modified engines. As a refill pack, it offers a cost-effective solution for maintaining your Hot Cams kit without purchasing a complete set. Ideal for riders who prioritize engine efficiency and reliability, these shims help prevent valve train issues and ensure smooth, powerful operation across a range of riding conditions.| SKU | GM5DF511E7 |
|---|---|
| MPN | 5PK948290 |
| Brand | Hot Cams |
| Category | Engine |
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Frequently Asked Questions
5PK948290 is a Hot Cams valve shim refill pack for 9.48 mm diameter shims used in many modern Japanese and some European engines. It is intended to replenish a 9.48 mm Hot Cams shim kit, not to serve as a complete assortment by itself.
Yes, as long as your engine uses 9.48 mm diameter shims and the thicknesses in this pack match what you need, you can use it without a full Hot Cams kit. However, it is most often purchased to restock an existing Hot Cams 9.48 mm kit.
Check your service manual or an OEM parts fiche for your cylinder head components. Many modern 250F/450F MX bikes and certain sportbikes use 9.48 mm shims, but you must confirm the diameter and thickness range before ordering.
No. It is a shim package refill, meaning it contains a specific subset of 9.48 mm shim sizes to replenish a larger Hot Cams kit. If you need a full assortment, look for a complete Hot Cams 9.48 mm shim kit instead.
Beyond basic hand tools, you should have a feeler gauge set, a micrometer or caliper to verify shim thickness, and your engine’s service manual to calculate the proper shim size and follow the correct procedure.
Installation Guide
Difficulty
Medium
Tools Required
- feeler gauges (metric)
- micrometer or digital caliper (to verify shim thickness)
- basic metric hand tools (sockets, ratchet, extensions)
- torque wrench (for cam caps and valve cover)
- magnet or pick tool (to remove/install shims)
- shop manual for the specific engine (for torque specs and procedure)
Pro Tips
- Work on a completely cold engine and measure all clearances twice for accuracy
- Lay out cam caps and related parts in order on a clean surface and mark their orientation
- Use a worksheet or spreadsheet to log each valve’s original clearance, original shim, and new shim
- Lightly oil shims before installation to help them seat in the buckets
- After setting clearances, rotate the crank several full revolutions by hand and recheck every valve
Common Mistakes to Avoid
- Mixing up cam caps or camshaft positions during removal/installation
- Not recording original shim sizes and valve clearances before changing shims
- Incorrectly calculating the new shim size required for proper clearance
- Failing to rotate the engine by hand several revolutions and recheck clearances before reassembly
- Not using a micrometer/caliper to verify actual shim thickness
- Allowing dirt/debris into the head while it is open
Comparison vs Stock/OEM
Functionally equivalent to OEM 9.48 mm valve shims, designed to match OEM diameter and thickness increments so they can replace stock shims directly.
Improvements
- Costs significantly less per shim than buying individual OEM shims
- Convenient packaging designed for workshop use and repeated valve services
Considerations
- You must confirm your engine uses 9.48 mm shims and that the thicknesses in this refill pack cover what you need; OEM parts fiche or service manual can help verify compatibility.
Durability & Warranty
Expected Lifespan
Designed to last for normal valve service intervals; shims themselves are not a wear item if clearances are set correctly and the valvetrain is in good condition.
Maintenance
No special maintenance required for the shims; follow the manufacturer’s recommended valve inspection intervals and replace shims only when clearances fall out of specification.
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