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Start ShoppingHot Cams 7.48mm Hardened Steel Valve Shim Refill Pack (5PK748185) - 1.85mm Thickness for 4-Stroke Engines
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Description
Ensure optimal engine performance with Hot Cams' precision-engineered valve shim refills. This 5-piece pack provides durable, hardened steel shims (7.48mm diameter, 1.85mm thickness) for maintaining perfect valve clearance in modern 4-stroke motorcycles and ATVs. Perfect for mechanics and riders seeking reliable valve adjustment solutions.
Key Features
- 7.48mm Diameter Shims: Precision-fitted for bucket/shim-under-bucket valve setups on popular 4-stroke engines.
- 1.85mm Thickness: Optimized for accurate valve clearance adjustment in high-performance applications.
- Hardened Steel Construction: Resists deformation and wear for long-lasting durability.
- 5-Piece Refill Pack: Conveniently top up existing Hot Cams 7.48mm shim kits without replacing the entire set.
- Universal Compatibility: Works with many modern motorcycles and ATVs using 7.48mm valve adjustment systems.
Why Choose This Product
These specialized shims deliver unmatched precision for valve clearance adjustments, ensuring smooth engine operation and improved performance. The hardened steel material withstands high temperatures and mechanical stress, while the refill format saves time and cost compared to purchasing full kits. Ideal for both routine maintenance and performance tuning, this pack is essential for riders who demand reliability from their powersports equipment.
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Ensure optimal engine performance with Hot Cams' precision-engineered valve shim refills. This 5-piece pack provides durable, hardened steel shims (7.48mm diameter, 1.85mm thickness) for maintaining perfect valve clearance in modern 4-stroke motorcycles and ATVs. Perfect for mechanics and riders seeking reliable valve adjustment solutions.
Key Features
- 7.48mm Diameter Shims: Precision-fitted for bucket/shim-under-bucket valve setups on popular 4-stroke engines.
- 1.85mm Thickness: Optimized for accurate valve clearance adjustment in high-performance applications.
- Hardened Steel Construction: Resists deformation and wear for long-lasting durability.
- 5-Piece Refill Pack: Conveniently top up existing Hot Cams 7.48mm shim kits without replacing the entire set.
- Universal Compatibility: Works with many modern motorcycles and ATVs using 7.48mm valve adjustment systems.
Why Choose This Product
These specialized shims deliver unmatched precision for valve clearance adjustments, ensuring smooth engine operation and improved performance. The hardened steel material withstands high temperatures and mechanical stress, while the refill format saves time and cost compared to purchasing full kits. Ideal for both routine maintenance and performance tuning, this pack is essential for riders who demand reliability from their powersports equipment.| SKU | GM531DBC83 |
|---|---|
| MPN | 5PK748185 |
| Brand | Hot Cams |
| Category | Engine |
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Frequently Asked Questions
No. This is a 5‑piece refill pack of one specific size (7.48 mm diameter, 1.85 mm thick). It is meant to restock a Hot Cams 7.48 mm shim kit, not replace a full kit.
Check your owner’s/service manual or existing shims. Most modern Japanese 250/450 MX and many street/ATV 4‑strokes use 7.48 mm shims, but some engines use 9.48 mm or other sizes. Always confirm before ordering.
Beyond normal hand tools, you’ll need a feeler gauge set and you should have a torque wrench and the factory service manual. A small magnet or pick is very helpful for removing the shims from the buckets.
Yes, provided the diameter is the same and the thickness is what you need. Many mechanics mix OEM and aftermarket shims as long as they are quality hardened shims of the correct size.
Shims themselves rarely wear out under normal conditions; it’s usually the valve seats and valves that wear, causing clearance changes. Shims can be reused indefinitely as long as their surfaces remain smooth and they are the correct thickness.
Installation Guide
Difficulty
Medium
Est. Time
1 hr 0 min
Tools Required
- service manual for the specific machine
- metric socket set and ratchet
- torque wrench
- feeler gauge set (metric)
- small magnet or pick tool to lift shims
- micrometer or caliper (to verify shim thickness if needed)
- clean shop towels
- engine assembly lube or clean engine oil
Pro Tips
- Work on a completely cold engine; most specs are given for a cold engine.
- Measure and write down each valve’s clearance and existing shim size before changing anything.
- Rotate the engine by hand several full revolutions and recheck timing marks before starting.
- Recheck all clearances after the new shims are installed and the cams are torqued down.
- Replace the valve cover gasket if it’s hard, cracked, or has been reused many times.
Common Mistakes to Avoid
- Not recording original shim sizes and positions before swapping.
- Incorrect valve clearance measurement due to cold vs. hot engine or improper feeler gauge technique.
- Mixing up intake and exhaust shims or cam caps during reassembly.
- Failing to torque cam caps and valve cover bolts to spec, leading to damage or leaks.
- Rotating the engine with timing out of alignment, risking valve‑to‑piston contact.
Comparison vs Stock/OEM
Functionally equivalent to OEM 7.48 mm hardened valve shims, designed to match diameter and thickness specifications used in many OEM engines.
Improvements
- Cost‑effective compared with purchasing individual OEM shims from a dealer.
- Convenient multi‑pack of a commonly needed size for frequent valve adjustments.
- Consistent sizing increments when used with a Hot Cams kit for easier tuning.
Considerations
- Always verify diameter and target thickness against OEM specs before installation.
- If engine is under factory warranty, some manufacturers prefer or require OEM parts.
Durability & Warranty
Expected Lifespan
Indefinite under normal use; shims are hardened steel and typically outlast the valves and seats themselves.
Warranty
Typically covered by Hot Cams’ standard limited warranty against manufacturing defects (check current Hot Cams policy or the specific retailer’s listing).
Maintenance
No direct maintenance. Inspect shim surfaces when removed; replace any shim that shows pitting, galling, or unusual wear. Continue to check valve clearances at the intervals specified in the owner’s manual.
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