While uncommon, some items may ship from a separate warehouse

About the Clutch Cover

Features
Set your ride apart from the rest with the ultimate look in race performance
Lightweight factory clutch covers provide years of outstanding protection; guaranteed not to warp
Individually surfaced for a perfect, leak-free fit
Super-tough, powder-coated finish resists weathering and wear and tear
Asbestos-free gasket is bound with nitrile for tight, leak-free seal
OEM paper gaskets can be reused, or use the supplied O-ring

Specs
Product Name Cover
Units Each
Color/Finish Black / Powder-Coated
Riding Style Off-Road / Street
Model Factory Racing
Type Clutch

Package info
Weight 0.82 lbs
Height 2.55
Length 7.95
Width 7.91

About the Ignition Cover

Features
Look like a professional with the Factory Ignition Cover
Seals properly, guarding inside of engine from dirt and water and outlasts stock covers
Boyesen Factory Covers are cast from the highest grade of aluminum and are strong yet lightweight
Super-tough, powder-coated finish resists weathering and wear and tear

Specs
Riding Style Street / Off-Road
Color/Finish Black / Powder-Coated
Type Ignition
Units Each
Material Aluminum
Product Name Cover
Model Factory Racing

Package info
Weight 0.78 lbs
Height 2.55
Length 8.07
Width 7.95

About the 2013–2015 KTM 150 SX

Here's a detailed overview of the 2013–2015 KTM 150 SX:

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Overview and Historical Context:

The 2013–2015 KTM 150 SX is a premium, high-performance two-stroke motocross motorcycle designed for riders looking to bridge the gap between the lighter 125cc class and the heavier 250cc two-stroke category. These models quickly gained popularity among racers who appreciated a power-to-weight ratio offering increased torque, stronger mid-range power, and more versatility compared to traditional 125cc machines.

Positioned as a competition-focused model, the 150 SX became known for its aggressive power delivery, lightweight agility, and excellent build quality.

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Engine and Performance:

• Engine Specifications:

  • Displacement: 143.6 cc, liquid-cooled, single-cylinder two-stroke engine
  • Intake: V-Force reed valve system for maximum throttle response
  • Carburetor: Keihin PWK 38mm carburetor
  • Transmission: Six-speed close-ratio gearbox optimized for motocross racing

• Performance Traits:

  • Powerful, aggressive mid-to-top-end performance exceeding typical 125cc power output, yet retaining agile handling and responsiveness
  • Noticeably improved low-to-mid torque compared to KTM’s 125 SX, offering better acceleration out of corners and greater ease on jumps
  • Explosive throttle response ideal for competitive motocross racing, appealing especially to aggressive riders who utilize high-RPM riding styles

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Chassis, Suspension, and Handling:

• Frame and Chassis:

  • Lightweight chromoly steel frame providing optimal rigidity and balanced handling
  • Precise handling characteristics, agile cornering, and confidence-inspiring stability at high speeds
  • Ergonomic bodywork allowing easy rider movement and control, facilitating efficient maneuvering on demanding motocross tracks

• Suspension Components:

  • Premium WP Suspension:
    • Front Forks: WP 48mm Closed Cartridge inverted forks, fully adjustable compression and rebound damping
    • Rear Shock: WP linkage-type rear shock absorber (SX models feature linkage), fully adjustable for precise track tuning

• Braking System:

  • Powerful Brembo hydraulic disc brakes front and rear, providing excellent modulation and reliable stopping power under race conditions

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Special Features and Equipment:

• Factory-equipped hydraulic clutch (Brembo) for precise engagement, smooth operation, and reduced rider fatigue during intense riding sessions
• Excel rims paired with lightweight CNC-machined hubs, providing excellent durability and reduced unsprung weight
• Race-ready ergonomics, slim design, and competition-oriented aesthetics consistent with KTM’s motocross lineage
• Easy-access air filter box, simplifying quick maintenance between motos

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Riding Impression & Reputation:

The KTM 150 SX was consistently praised for:

• Stronger and more versatile powerband than standard 125cc motocross bikes, enabling competitive racing across broader skill ranges and track conditions
• Extremely responsive engine performance, providing aggressive acceleration and excellent top-end power
• Lightweight agility and handling that rewards aggressive riding styles, ideal for intermediate and advanced riders
• Premium suspension and chassis components delivering excellent track feedback, confidence-inspiring handling, and effective rough-terrain absorption

This bike became especially popular with intermediate-level racers, amateur motocross enthusiasts, and seasoned riders looking to maximize performance without stepping up to heavier 250cc platforms.

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Collectibility and Market Popularity:

The 2013–2015 KTM 150 SX remains highly desirable due to:

• Its unique displacement, filling a niche market between 125cc and 250cc two-strokes
• KTM’s ongoing reputation for quality, reliability, and excellent aftermarket support
• Strong resale values owing to popularity in amateur racing circuits and continued demand among two-stroke motocross enthusiasts

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Common Maintenance and Issues:

• Top-End Maintenance:

  • Regular piston and ring replacements every 40–60 hours depending on riding intensity
  • Simpler maintenance typical of two-stroke engines, making service intervals manageable and affordable

• Suspension Maintenance:

  • Regular fork seal and fluid changes recommended every 40–60 hours
  • Routine servicing of shock linkage bearings, pivot points, and wheel bearings essential to maintain optimal track handling

• Carburetor Jetting:

  • Frequent jetting adjustments may be necessary based on riding elevation, temperature, and track conditions for peak performance

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Summary:

The 2013–2015 KTM 150 SX stands out as a potent, competitive two-stroke motocross bike providing a perfect blend of power, agility, and handling performance. Its appeal to intermediate and expert riders, combined with KTM’s reputation for build quality and competitive engineering, ensures continued popularity and desirability.