Hot Cams 7.48mm Valve Shim Refill Pack - Precision Engine Maintenance for Motocross & Street Bikes

Description

Ensure peak engine performance with Hot Cams' premium valve shim refill pack, engineered for precision fit and durability. These hardened steel shims are essential for maintaining proper valve clearance, enhancing power delivery and engine longevity in high-performance motorcycles.

Key Features

  • 7.48mm Outer Diameter: Precision-machined for exact fitment in modern Japanese 250/450cc engines.
  • 2.70mm Thickness: Optimal thickness for precise valve clearance adjustment in demanding riding conditions.
  • Hardened Steel Construction: Durable, wear-resistant material ensures long-lasting performance under extreme heat and pressure.
  • Refill Pack Format: Convenient small parts pouch packaging for easy storage and quick access during maintenance.
  • Compatibility: Specifically designed for Hot Cams 7.48mm valve shim kits used in motocross and street bikes.

Why Choose This Product

Upgrade your engine maintenance routine with Hot Cams' trusted shim refills. These shims deliver consistent performance, reduce valve train noise, and improve throttle response. The exact 7.48 x 2.70mm dimensions ensure perfect alignment with OEM specifications, while the hardened steel alloy withstands high RPMs and thermal stress. Perfect for riders seeking reliable, precision-engineered solutions for their high-performance engines.
SKU: GMB2580705
MPN: 5PK748270
Category: Engine
Brand: Hot Cams
Stock: In Stock
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Ensure peak engine performance with Hot Cams' premium valve shim refill pack, engineered for precision fit and durability. These hardened steel shims are essential for maintaining proper valve clearance, enhancing power delivery and engine longevity in high-performance motorcycles.

Key Features

  • 7.48mm Outer Diameter: Precision-machined for exact fitment in modern Japanese 250/450cc engines.
  • 2.70mm Thickness: Optimal thickness for precise valve clearance adjustment in demanding riding conditions.
  • Hardened Steel Construction: Durable, wear-resistant material ensures long-lasting performance under extreme heat and pressure.
  • Refill Pack Format: Convenient small parts pouch packaging for easy storage and quick access during maintenance.
  • Compatibility: Specifically designed for Hot Cams 7.48mm valve shim kits used in motocross and street bikes.

Why Choose This Product

Upgrade your engine maintenance routine with Hot Cams' trusted shim refills. These shims deliver consistent performance, reduce valve train noise, and improve throttle response. The exact 7.48 x 2.70mm dimensions ensure perfect alignment with OEM specifications, while the hardened steel alloy withstands high RPMs and thermal stress. Perfect for riders seeking reliable, precision-engineered solutions for their high-performance engines.
SKU GMB2580705
MPN 5PK748270
Brand Hot Cams
Category Engine
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Frequently Asked Questions

This is a refill pack for 7.48 mm diameter valve shims in the 2.70 mm thickness. It is meant to replenish a Hot Cams 7.48 mm shim kit when you run low on that specific size.

It will fit any engine that uses 7.48 mm diameter valve shims and requires a 2.70 mm thickness for proper clearance. You must confirm in your service manual or by measuring your existing shims that your engine uses 7.48 mm shims; fitment is not model‑specific from the manufacturer.

If you already own a Hot Cams 7.48 mm shim kit and are just running low on 2.70 mm shims, this refill pack is appropriate. If you do not have a kit or need a wide range of thicknesses, you should purchase the complete Hot Cams 7.48 mm shim kit instead.

It is sold as a small refill quantity (commonly 5 pieces) of one specific size, but you should confirm the exact count on the retailer’s product page as packaging can vary by batch or region.

Yes, as long as the diameter and thickness match, these hardened steel shims can be used alongside OEM shims. Always verify thickness with a micrometer and keep intake and exhaust positions organized.

Installation Guide

Difficulty Medium
Est. Time 1 hr 0 min

Tools Required

  • Service manual for specific motorcycle/ATV/UTV
  • Metric socket set
  • Torque wrench
  • Feeler gauge set (metric)
  • Micrometer or digital caliper (to verify shim thickness)
  • Magnetic pickup tool or small pick
  • Clean shop rags
  • Parts tray or organizer for shims

Pro Tips

  • Lay out a labeled diagram (or use a tray) showing each valve position and write down measured clearances and shim sizes as you go.
  • Use a micrometer or high‑quality digital caliper to confirm shim thickness, even if size is laser‑etched.
  • Work on a cold engine and follow the factory manual clearance spec exactly (intake vs exhaust).
  • Turn the engine over by hand at least two full revolutions and recheck all clearances before reassembling covers and fuel tank.
  • Keep the work area extremely clean; any debris around the shim buckets can cause premature wear.

Common Mistakes to Avoid

  • Not recording original shim locations and sizes before removal
  • Mixing up intake and exhaust shims or cam caps
  • Failing to rotate the engine to the correct TDC position before measuring clearances
  • Not rechecking valve clearances after installing new shims
  • Dropping shims into the engine (cam chain tunnel or oil return passages)
  • Installing the wrong shim diameter (must be 7.48 mm for this pack)

Comparison vs Stock/OEM

Functionally equivalent to OEM 7.48 mm valve shims; they replace the stock shims to achieve specified valve clearance.

Improvements

  • Generally sold in more convenient and economical quantities compared to individual OEM shims.
  • Standardized sizing and clear laser marking (on many Hot Cams shims) can make selection and organization easier than some OEM pieces.

Considerations

  • Always verify shim diameter and thickness match OEM specs before installation.
  • Hardness and quality are designed to meet or exceed OEM, but lifespan will still depend heavily on engine condition and maintenance interval.

Durability & Warranty

Expected Lifespan Typically lasts the service life of the engine unless valve seats or valves are wearing abnormally; shims themselves rarely wear significantly under normal use.
Warranty Standard parts warranty via retailer or distributor (exact terms vary by seller).
Maintenance No direct maintenance for the shims themselves; follow your vehicle’s recommended valve clearance inspection interval and re‑measure clearances periodically.

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