2006 Honda CRF250R Torque Specs: Fastener Reference for the Evolved MX Racer
Shop parts for a 2006 Honda CRF250R Dirt Bike.
The 2006 Honda CRF250R received meaningful updates to its 249cc DOHC liquid-cooled engine, including revised cylinder porting and combustion chamber geometry aimed at broadening the power band. Combined with updated suspension valving for improved cornering stability, the 2006 CRF250R represented a more versatile and accessible version of Honda's 250 four-stroke racer. This torque reference covers all key fasteners on the 2006 CRF250R.
Engine Fastener Torque Specs
The 2006 CRF250R's revised 249cc DOHC engine benefits from careful attention to head bolt torque during any top-end service. The updated combustion chamber geometry puts specific demands on head gasket clamping—use the crisscross torque sequence from center outward on reassembly.
| Fastener | Torque (ft-lb) | Torque (Nm) |
|---|---|---|
| Spark plug | 8–10 | 11–14 |
| Oil drain bolt | 18–22 | 24–30 |
| Cylinder head bolts (10mm) | 29–33 | 39–45 |
| Cylinder head bolts (6mm) | 9–11 | 12–15 |
| Cam sprocket bolts | 14–18 | 19–24 |
| Clutch hub nut | 87–101 | 118–137 |
| Flywheel/rotor nut | 76–87 | 103–118 |
Suspension & Chassis Hardware
Updated suspension valving on the 2006 CRF250R improves cornering stability, but that improvement is only realized with properly torqued fork clamps and linkage hardware. Loose clamps allow fork tubes to rotate under hard braking—a situation that completely negates suspension setup work.
| Fastener | Torque (ft-lb) | Torque (Nm) |
|---|---|---|
| Fork pinch bolts (upper) | 15–19 | 20–26 |
| Fork pinch bolts (lower) | 15–19 | 20–26 |
| Steering stem nut | 72–87 | 98–118 |
| Handlebar clamp bolts | 14–18 | 19–24 |
| Swingarm pivot bolt | 87–101 | 118–137 |
| Rear shock upper mount | 33–40 | 45–54 |
| Rear shock lower mount | 33–40 | 45–54 |
| Linkage pivot bolts | 40–47 | 54–64 |
Wheels & Drivetrain Torque Specs
| Fastener | Torque (ft-lb) | Torque (Nm) |
|---|---|---|
| Front axle nut | 36–43 | 49–58 |
| Rear axle nut | 76–87 | 103–118 |
| Rear sprocket nuts | 36–43 | 49–58 |
| Drive sprocket bolt | 25–29 | 34–39 |
| Chain adjuster lock nuts | 14–18 | 19–24 |
Brake System Fasteners
| Fastener | Torque (ft-lb) | Torque (Nm) |
|---|---|---|
| Front caliper mounting bolts | 20–25 | 27–34 |
| Front brake disc bolts | 14–17 | 19–23 |
| Rear caliper mounting bolts | 22–27 | 30–37 |
| Rear brake disc bolts | 14–17 | 19–23 |
The 2006 CRF250R's broader power band makes it a more forgiving racer, but that forgiveness doesn't extend to fastener maintenance. Pre-race torque checks of axles, brake hardware, fork clamps, handlebar mounts, and sprocket hardware are mandatory for a race bike. After hard motos, check linkage pivot and swingarm pivot torque—these high-stress fasteners see significant load at every landing and corner exit.
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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.
