1990 Honda CR125 Torque Specs: MX Fastener Reference
Shop parts for a 1990 Honda CR125 Dirt Bike.
The 1990 Honda CR125 opens a new decade for Honda’s 125cc MX line with continued development of the late-1980s platform. The 1990 model received updates to the power valve system and chassis for improved performance, building on the strong foundation established in the 1986 redesign. Whether you ride the 1990 CR125 in vintage competition or keep it as a collection piece, maintaining correct fastener torque is the foundation of reliable, authentic performance.
Engine Fasteners
Two-stroke premix, no oil drain plug. 1990 CR125 engine hardware:
| Fastener | Torque |
|---|---|
| Spark plug | 20–25 Nm (15–18 ft-lb) |
| Cylinder head bolts | 22–28 Nm (16–21 ft-lb) |
| Cylinder base bolts/nuts | 15–20 Nm (11–15 ft-lb) |
| Flywheel/rotor nut | 45–55 Nm (33–41 ft-lb) |
| Clutch hub nut | 45–55 Nm (33–41 ft-lb) |
Suspension & Chassis
| Fastener | Torque |
|---|---|
| Fork clamp bolts (upper) | 20–25 Nm (15–18 ft-lb) |
| Fork clamp bolts (lower) | 20–25 Nm (15–18 ft-lb) |
| Handlebar clamp bolts | 20–25 Nm (15–18 ft-lb) |
| Swingarm pivot bolt/nut | 60–70 Nm (44–52 ft-lb) |
| Rear shock upper mount | 35–45 Nm (26–33 ft-lb) |
| Rear shock lower mount | 35–45 Nm (26–33 ft-lb) |
| Linkage pivot bolts | 30–38 Nm (22–28 ft-lb) |
Wheels & Drivetrain
| Fastener | Torque |
|---|---|
| Front axle nut | 40–50 Nm (30–37 ft-lb) |
| Rear axle nut | 65–75 Nm (48–55 ft-lb) |
| Rear sprocket nuts | 22–28 Nm (16–21 ft-lb) |
Brakes
Front disc and rear drum on the 1990 CR125.
| Fastener | Torque |
|---|---|
| Front caliper mounting bolts | 22–28 Nm (16–21 ft-lb) |
| Front disc bolts | 8–12 Nm (6–9 ft-lb) |
| Rear brake anchor bolt | 20–25 Nm (15–18 ft-lb) |
Pre-Ride Fastener Check for Vintage MX Riders
Before each ride on the 1990 CR125, take a few minutes to check the five most critical fasteners: rear axle nut, front axle nut, handlebar clamp bolts, caliper mounting bolts, and swingarm pivot nut. On a bike used in vintage MX events, these are the items most likely to work loose through the vibration and impacts of competitive riding. A pre-ride check takes less than five minutes and catches issues before they become ride-ending problems.
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.
