Upgrade your 2003-2005 Kawasaki KX125 with this Boyesen Factory Racing Ignition (Generator) & Clutch Cover Kit in a sleek Black powder-coated finish.

Both covers are crafted from premium aluminum to ensure durability without adding unnecessary weight.

Engineered to seal properly, they protect your engine and clutch components from dirt and water for long-lasting performance.

The super-tough, powder-coated finish resists weathering and wear, making your bike look sharp even under the toughest off-road conditions.

Give your KX125 that professional, race-inspired appearance with these high-quality covers.

Item Specifics:

1. Ignition (Generator) Cover (SC-11AB)

   • Brand: Boyesen
   • Product Name: Ignition Cover
   • Type: Ignition
   • Model: Factory Racing
   • Color/Finish: Powder-Coated / Black
   • Material: Aluminum
   • Units: Each
   • Riding Style: Off-Road
   • Replaces OEM Ignition (Generator) Cover: 14031-1397
   • Features:
     • Seals properly to guard the engine from dirt and water
     • Cast from the highest grade of aluminum; strong yet lightweight
     • Super-tough, powder-coated finish resists wear

2. Clutch Cover (CC-11AB)

   • Brand: Boyesen
   • Product Name: Clutch Cover
   • Type: Clutch
   • Model: Factory Racing
   • Color/Finish: Black / Powder-Coated
   • Material: Aluminum
   • Units: Each
   • Riding Style: Off-Road
   • Replaces OEM Clutch Cover: 14032-1533
   • Features:
     • Seals properly, outlasting stock covers
     • Strong yet lightweight aluminum construction
     • Durable powder-coat resists weathering

Fitment Table:

(Please confirm compatibility with your specific year/model before purchase.)

Package Information:

• Ignition Cover Weight: 0.65 lbs

  • Height: 2.55"
  • Length: 7.87"
  • Width: 7.83"

• Clutch Cover Weight: 0.65 lbs (approx.)

  • (Similar dimensions; combined packaging may vary.)

Condition: New

Give your Kawasaki KX125 a professional look and enhanced protection—upgrade today with Boyesen Factory Racing Covers!

The 2003–2005 Kawasaki KX125 is a beloved two-stroke motocross bike known for its agile handling, strong high-RPM power delivery, and sharp, race-focused chassis. Although these years marked the final stages for Kawasaki's production of the 125cc two-stroke, the KX125 remains a favorite among amateur racers, enthusiasts, and collectors alike.

Here’s a detailed look at the 2003–2005 Kawasaki KX125:

Overview and Historical Context:

By the early 2000s, the motocross industry was rapidly shifting toward four-stroke motorcycles, notably driven by bikes like the Yamaha YZ250F. Despite this trend, Kawasaki continued refining its venerable KX125, aiming to keep it competitive and appealing to dedicated two-stroke racers.

The 2003–2005 models represented Kawasaki's ongoing improvements in chassis design, ergonomics, and engine performance, keeping the bike relevant on the racetrack and attractive in the amateur racing market.

Engine and Performance:

• Engine Specifications:

  • 124cc single-cylinder, liquid-cooled two-stroke
  • Kawasaki Integrated Power Valve System (KIPS) for enhanced power spread
  • Reed-valve intake with Mikuni TMX carburetor
  • 6-speed close-ratio transmission

• Performance Traits:

  • Strong mid-range to top-end power; the bike preferred higher RPM riding style.
  • Nimble acceleration but limited low-end torque compared to competitors like the YZ125 or KTM 125 SX.
  • Excellent throttle response and quick-revving character, ideal for aggressive riding and corner-to-corner bursts.

Chassis, Suspension, and Handling:

• Frame and Chassis:

  • Lightweight perimeter steel frame design, known for optimal rigidity, stability, and predictable handling.
  • Rider-friendly ergonomics offering a natural, balanced riding position suitable for aggressive maneuvering.

• Suspension Components:

  • KYB inverted front forks: fully adjustable compression and rebound damping.
  • KYB rear shock with Kawasaki’s Uni-Trak linkage: fully adjustable compression, rebound damping, and preload.
  • Suspension was notably responsive, plush, and easily tuned for varied track conditions.

• Braking System:

  • Nissin hydraulic disc brakes front and rear, providing exceptional stopping power and consistent performance on the racetrack.

Key Evolution and Differences by Year:

2003:

• Significant frame geometry refinement for better stability and handling.
• Enhanced suspension settings improved rider comfort and track feedback.
• Engine tuning adjustments slightly improved top-end performance, although it still required higher RPMs for optimal power.

2004:

• Minor engine refinements to the cylinder porting, improving mid-range punch and top-end rev.
• Adjustments to the power valve timing improved throttle response.
• Slightly revised suspension valving delivered better control and stability over rough terrain.

2005:

• Final production year of the KX125 (in the U.S. market), making this year highly collectible.
• Further improvements in ergonomics and suspension tuning for a refined overall ride.
• The 2005 model provided Kawasaki’s final expression of the KX125 formula, with optimal chassis balance and handling.

Racing Heritage and Legacy:

The KX125 was a staple among amateur and semi-professional racers due to its affordability, easy maintenance, and lightweight chassis, making it a preferred machine for young riders and those transitioning to larger-displacement classes.

While professional racing by this point had largely transitioned to 250 four-strokes, many privateer riders and amateur racers continued to achieve success aboard the KX125. Kawasaki's focus during these final years was maintaining competitiveness in amateur motocross rather than the professional factory racing arena.

Collectibility and Market Popularity:

The 2003–2005 KX125 models, particularly the 2005 (final production year), are highly sought-after due to their significance as the end of Kawasaki’s two-stroke 125cc motocross bikes.

• Most Collectible Model:

  • 2005 KX125 (final year of U.S. availability, considered particularly desirable).

• Market Availability:

  • Well-maintained examples command premium prices due to their desirability and collectible status.
  • Strong aftermarket support for restoration and racing parts remains robust.

Common Maintenance and Issues:

• Power Valve (KIPS) Maintenance:

  • Requires regular cleaning and servicing (every 20-30 riding hours) for optimal engine performance.

• Top-End Rebuild:

  • Recommended intervals around every 40–50 riding hours to maintain peak performance.

• Carburetor Tuning:

  • Mikuni TMX carburetors often required careful jetting adjustments for best throttle response.

• Suspension Maintenance:

  • Regular fork seal replacement and linkage bearing maintenance is key to maintaining optimal handling.

Conclusion:

The 2003–2005 Kawasaki KX125 stands out as one of the last iconic Japanese two-stroke 125cc motocross bikes. Known for its agile handling, quick-revving engine, and responsive chassis, the KX125 maintains a dedicated fanbase today, prized for its collectibility, ease of maintenance, and sheer riding enjoyment.

Let me know if you'd like additional specifics or details!