2003 Cobra CX50 King Dirt Bike Torque Specs
Shop parts for a 2003 Cobra CX50 King Dirt Bike.
The 2003 Cobra CX50 King is the premium variant of the CX50 lineup, featuring a factory-tuned engine, upgraded suspension components, and competition-ready chassis geometry in a machine designed for the most serious young 50cc competitors. The King designation signals a step above standard competition specification — premium suspension hardware, sharper chassis geometry, and an engine tuned closer to its peak performance potential. At the top of Cobra’s 2003 50cc range, the CX50 King demands the same preparation discipline as any high-specification race machine regardless of displacement. Pre-event torque verification of every fastener is standard practice for a machine at this specification level.
Engine Torque Specifications
| Fastener | Torque (Nm) | Torque (ft-lbs) |
|---|---|---|
| Spark Plug | 12 | 9 |
| Cylinder Head Nuts | 8 | 6 |
| Cylinder Base Nuts | 8 | 6 |
| Flywheel/Rotor Nut | 25 | 18 |
| Clutch Hub Nut | 20 | 15 |
| Exhaust Flange Nuts | 8 | 6 |
Competition Chassis & Suspension
| Fastener | Torque (Nm) | Torque (ft-lbs) |
|---|---|---|
| Swingarm Pivot Bolt | 22 | 16 |
| Fork Clamp Bolts | 8 | 6 |
| Handlebar Clamp Bolts | 8 | 6 |
| Shock Upper Mount | 18 | 13 |
| Shock Lower Mount | 18 | 13 |
| Subframe Bolts | 10 | 7 |
| Engine Mount Bolts | 15 | 11 |
Wheels & Drivetrain
| Fastener | Torque (Nm) | Torque (ft-lbs) |
|---|---|---|
| Front Axle Nut | 18 | 13 |
| Rear Axle Nut | 28 | 21 |
| Rear Sprocket Nuts | 12 | 9 |
| Chain Adjuster Lock Nuts | 8 | 6 |
Brakes
| Fastener | Torque (Nm) | Torque (ft-lbs) |
|---|---|---|
| Front Caliper Bolts | 10 | 7 |
| Rear Caliper Bolts | 10 | 7 |
| Disc Bolts | 6 | 4 |
King Edition Competition Notes
Premix two-stroke — no oil drain plug. The King’s premium specification demands pre-event torque verification as standard practice. A 1/4-inch drive click-type wrench for engine hardware; a 3/8-inch drive for chassis fasteners.
Thread Locker Recommendations
- Rear sprocket nuts
- Disc bolts
- Subframe bolts
- Exhaust flange nuts
Torque Wrench Selection
A 1/4-inch drive click-type for engine fasteners and a 3/8-inch drive for chassis and wheel hardware. Two calibrated wrench sizes maintain the full King Edition competition specification.
Related Shopping Categories
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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.