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Start ShoppingHot Cams 7.48mm Valve Shim Refill Pack - 180 Piece Assorted Sizes for Engine Performance
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Description
Upgrade your engine's performance with Hot Cams' premium valve shim refills. These precision-engineered shims deliver reliable valve clearance adjustments, ensuring smooth operation and long-lasting durability for high-performance engines.
Key Features
- 7.48mm Diameter: Precision-fit for Hot Cams valve shim kits, ensuring accurate valve clearance adjustments.
- 1.20–3.50mm Thickness Range: 0.05mm increments provide precise tuning options for optimal engine performance.
- Hardened Valve Shim Steel: Durable, wear-resistant material for extended service life and consistent performance.
- 180-Piece Assorted Pack: Comprehensive refill solution for frequent maintenance or large-scale engine work.
- USA-Made Quality: Manufactured in the USA for superior craftsmanship and reliability.
Why Choose This Product
These shims are essential for maintaining peak engine efficiency. Their hardened steel construction resists deformation under high temperatures and pressures, while the 0.05mm increment precision ensures perfect valve clearance adjustments. The 180-piece refill pack is ideal for mechanics and riders needing reliable, long-lasting solutions for valve maintenance. Compatible with all Hot Cams 7.48mm shim kits, this refill pack simplifies inventory management and ensures you're always prepared for engine tuning or repairs.
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Upgrade your engine's performance with Hot Cams' premium valve shim refills. These precision-engineered shims deliver reliable valve clearance adjustments, ensuring smooth operation and long-lasting durability for high-performance engines.
Key Features
- 7.48mm Diameter: Precision-fit for Hot Cams valve shim kits, ensuring accurate valve clearance adjustments.
- 1.20–3.50mm Thickness Range: 0.05mm increments provide precise tuning options for optimal engine performance.
- Hardened Valve Shim Steel: Durable, wear-resistant material for extended service life and consistent performance.
- 180-Piece Assorted Pack: Comprehensive refill solution for frequent maintenance or large-scale engine work.
- USA-Made Quality: Manufactured in the USA for superior craftsmanship and reliability.
Why Choose This Product
These shims are essential for maintaining peak engine efficiency. Their hardened steel construction resists deformation under high temperatures and pressures, while the 0.05mm increment precision ensures perfect valve clearance adjustments. The 180-piece refill pack is ideal for mechanics and riders needing reliable, long-lasting solutions for valve maintenance. Compatible with all Hot Cams 7.48mm shim kits, this refill pack simplifies inventory management and ensures you're always prepared for engine tuning or repairs.| SKU | GM8EA4C29D |
|---|---|
| MPN | 5PK748180 |
| Brand | Hot Cams |
| Category | Engine |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Honda | CRF450R | 2009-2019 |
| Kawasaki | KX450F | 2013-2023 |
| Yamaha | YZ450F | 2008-2022 |
| KTM | 450 SX-F | 2010-2024 |
Frequently Asked Questions
This is a 7.48 mm diameter valve shim refill package for Hot Cams shim kits. It contains an assortment of 7.48 mm shims from roughly 1.20–3.50 mm in 0.05 mm increments (exact counts per size may vary by lot).
No. The 5PK748180 is a refill pack only. It is intended to restock an existing Hot Cams 7.48 mm shim kit. Shims typically come bagged by size, not in a divided box.
If your engine uses 7.48 mm diameter valve shims, this pack will fit. Many Japanese 250F/450F motocross bikes and some street and sport models use 7.48 mm shims. Always confirm shim diameter and thickness range in your service manual before ordering.
Yes. They are hardened valve adjustment shims designed to the same 7.48 mm diameter standard and can be used alongside OEM shims as long as the thickness is correct and the surface is in good condition.
You mainly need standard hand tools, an accurate feeler gauge set, and access to your model’s service manual. A magnet or pick to remove shims and a torque wrench for cam caps make the job easier and safer.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 0 min
Tools Required
- Service manual for your exact model
- Metric socket set
- Torque wrench
- Feeler gauge set (metric)
- Magnet or pick tool (to remove shims/buckets)
- Caliper or micrometer (to verify shim thickness if desired)
- Clean shop towels
- Camshaft holding tool or zip‑ties (for some models)
Pro Tips
- Work on one cylinder at a time and label every shim you remove by valve position.
- Double‑check clearances after rotating the engine through at least two full revolutions by hand.
- Lay cams, caps, and buckets in a marked tray in the exact orientation they came out.
- Use a strong magnet to lift shims from buckets to avoid dropping them.
- Always verify the shim size stamped on the shim; if worn or unreadable, confirm with a micrometer.
Common Mistakes to Avoid
- Mixing up cam caps or camshaft positions during disassembly
- Not recording original shim sizes and positions before changing them
- Incorrect valve clearance measurement (engine not at true TDC for that cylinder)
- Dropping shims into the engine (cam chain area or oil returns)
- Not torquing cam caps and valve cover to spec and in the correct sequence
Comparison vs Stock/OEM
Functionally equivalent to OEM 7.48 mm valve shims but sold as an assortment so you can service multiple engines or repeated valve checks without buying individual OEM shims.
Improvements
- Much lower cost per shim versus ordering OEM shims individually
- Broad thickness range lets you dial in clearances in 0.05 mm steps
- Convenient for shops or riders servicing multiple engines
Considerations
- Requires correct identification of your engine’s shim diameter (7.48 mm) before purchase
- Does not include storage box; intended as a restock for an existing kit
Durability & Warranty
Expected Lifespan
Designed to last the normal service life of the valve train; shims are not regular wear items if clearances and lubrication are correct.
Warranty
Typical Hot Cams limited warranty against manufacturing defects (terms vary by seller; see retailer/manufacturer).
Maintenance
No specific maintenance for the shims themselves; follow your vehicle’s recommended valve clearance inspection intervals and replace any shim that shows scoring, pitting, or abnormal wear.
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