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

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

Package info
Weight 0.71 lbs
Height 2.55
Length 7.99
Width 7.95

About the KTM 144 SX

Overview:

The 2007–2008 KTM 144 SX was introduced as a factory-built alternative to the 125 SX, offering increased displacement for enhanced low-end torque and mid-range performance. KTM designed the 144 SX specifically for riders who wanted more punch without sacrificing the agility of a lightweight two-stroke motocross bike.

Why the 144 SX?

• It was aimed at bridging the gap between 125cc two-strokes and the more powerful 250cc models.

• Ideal for racers wanting more grunt out of corners while still maintaining the handling agility of a 125.

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Engine and Performance:

• Displacement: 143.6 cc, single-cylinder, liquid-cooled two-stroke

• Carburetor: Keihin PWK 38mm

• Power Valve: V-Force reed valve system for better airflow and power management

• Transmission: 6-speed close-ratio gearbox

Performance Characteristics:

• Noticeably more low-end and mid-range torque than the 125 SX, making it more forgiving and quicker off the line.

• Maintains high-RPM power typical of 125cc bikes, with a stronger pull through the midrange.

• Smooth power delivery with a strong top-end kick, perfect for motocross tracks that require quick acceleration.

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Chassis and Suspension:

• Frame: Chromoly steel frame, lightweight and rigid, offering excellent handling.

• Front Suspension: WP 48mm inverted forks (fully adjustable).

• Rear Suspension: WP PDS (linkage-less system), fully adjustable for rebound and compression.

• Brakes: Brembo hydraulic disc brakes front and rear, known for their strong stopping power and modulation.

Handling:

• Agile and lightweight, perfect for technical tracks and tight corners.

• Easy to maneuver, with a responsive feel that rewards aggressive riding.

• Suspension settings leaned towards motocross, with good bottoming resistance for jumps.

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Collectibility and Popularity:

• The KTM 144 SX is relatively rare because it was only produced for two years.

• Riders appreciate it for its unique position in the KTM lineup—offering more power than a 125 without the bulk of a 250.

• Sought after by enthusiasts who enjoy the raw, powerful feel of a lightweight two-stroke.

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Maintenance and Common Issues:

• Top-End Maintenance:

  • Recommended every 30–50 hours for piston and ring replacement.

• Carburetor Tuning:

  • Requires frequent jetting adjustments, especially when riding in varying conditions.

• Power Valve Cleaning:

  • Needs regular cleaning to avoid carbon buildup, keeping power delivery smooth.

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Summary:

The 2007–2008 KTM 144 SX remains a favorite among two-stroke enthusiasts due to its unique blend of lightweight handling and enhanced power. It’s especially popular with riders who enjoy the spirited feel of a 125 but want just a bit more torque and versatility for motocross racing. The model's limited production run makes it a bit of a collector’s item, cherished by those who value its distinctive character and performance.