What Are the Torque Specs for a 2017 Honda CRF450RX?
Shop parts for a 2017 Honda CRF450RX Dirt Bike.
The 2017 Honda CRF450RX was Honda’s first dedicated cross-country enduro version of the CRF450R platform, launching alongside the fully redesigned 2017 CRF450R and sharing the same steel frame, unicam 449cc engine, and electric starter. The RX differs from the standard CRF450R with an 18-inch rear wheel, a larger fuel tank, a kickstand, a softer suspension setup, and enduro-appropriate gearing. These differences introduce torque considerations specific to the CRF450RX’s off-road enduro mission that the motocross-only CRF450R doesn’t address.
Engine Fastener Torque
The unicam 449cc engine in the 2017 CRF450RX uses the same internal fastener specifications as the 2017 CRF450R, reflecting the shared engine platform between the two models. The main practical difference for the RX is that enduro use accumulates more hours per season than typical motocross use—increasing the frequency of oil changes, valve checks, and the associated cam cover bolt remove-and-retorque cycles.
| Engine Component | Torque Spec |
|---|---|
| Spark plug | 18–22 Nm (13–16 ft-lb) |
| Oil drain plug | 29–35 Nm (21–26 ft-lb) |
| Cylinder head bolts (8mm) | 40–48 Nm (30–35 ft-lb) |
| Cylinder head bolts (6mm) | 12–15 Nm (9–11 ft-lb) |
| Cam sprocket bolt | 35–45 Nm (26–33 ft-lb) |
| Flywheel bolt | 85–100 Nm (63–74 ft-lb) |
| Clutch hub nut | 85–100 Nm (63–74 ft-lb) |
Suspension and Chassis Torque
The 2017 CRF450RX uses a softer suspension setup compared to the CRF450R, calibrated for the sustained pace of enduro and GNCC racing. The 18-inch rear wheel setup changes the swingarm and axle geometry compared to the 21/19-inch motocross wheel package. Rear axle nut torque is particularly important on the 2017 RX because the larger 18-inch rear wheel can mask slight axle movement that becomes apparent only during high-speed off-camber sections.
| Suspension & Chassis Component | Torque Spec |
|---|---|
| Upper fork clamp bolts | 20–25 Nm (15–18 ft-lb) |
| Lower fork clamp bolts | 20–25 Nm (15–18 ft-lb) |
| Handlebar clamp bolts | 20–25 Nm (15–18 ft-lb) |
| Swingarm pivot nut | 88–108 Nm (65–80 ft-lb) |
| Rear shock upper mount | 40–50 Nm (30–37 ft-lb) |
| Rear shock linkage bolts | 40–50 Nm (30–37 ft-lb) |
Drivetrain and Brake Torque
| Drivetrain Component | Torque Spec |
|---|---|
| Front axle nut | 59–69 Nm (44–51 ft-lb) |
| Rear axle nut | 88–108 Nm (65–80 ft-lb) |
| Rear sprocket nuts | 35–45 Nm (26–33 ft-lb) |
| Chain adjuster lock nuts | 22–26 Nm (16–19 ft-lb) |
| Brake Component | Torque Spec |
|---|---|
| Front caliper mounting bolts | 28–34 Nm (21–25 ft-lb) |
| Rear caliper mounting bolts | 22–26 Nm (16–19 ft-lb) |
| Front brake disc bolts | 20–24 Nm (15–17 ft-lb) |
| Rear brake disc bolts | 20–24 Nm (15–17 ft-lb) |
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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.