1978 Honda CR125 Torque Specs: Vintage MX Fastener Reference
Shop parts for a 1978 Honda CR125 Dirt Bike.
The 1978 Honda CR125 Elsinore sits in a period of significant development for Honda’s 125cc MX line. The CR125 platform was maturing by the late 1970s, with Honda refining engine power delivery, frame geometry, and suspension performance year by year. For vintage MX riders and restorers, the 1978 CR125 is a sought-after machine that rewards proper fastener maintenance with reliable, authentic performance.
Wheels & Drivetrain
Vintage CR125 axle hardware uses smaller fasteners than modern bikes. Handle these with care and verify thread condition before torquing.
| Fastener | Torque |
|---|---|
| Front axle nut | 30–40 Nm (22–30 ft-lb) |
| Rear axle nut | 55–65 Nm (41–48 ft-lb) |
| Rear sprocket nuts | 20–25 Nm (15–18 ft-lb) |
Engine Fasteners
Two-stroke premix, no oil drain. 1978 CR125 engine hardware:
| Fastener | Torque |
|---|---|
| Spark plug | 18–22 Nm (13–16 ft-lb) |
| Cylinder head bolts | 18–22 Nm (13–16 ft-lb) |
| Cylinder base bolts/nuts | 14–18 Nm (10–13 ft-lb) |
| Flywheel/rotor nut | 40–50 Nm (30–37 ft-lb) |
| Clutch hub nut | 40–50 Nm (30–37 ft-lb) |
Suspension & Frame
| Fastener | Torque |
|---|---|
| Fork clamp bolts | 18–22 Nm (13–16 ft-lb) |
| Handlebar clamp bolts | 18–22 Nm (13–16 ft-lb) |
| Swingarm pivot bolt/nut | 45–55 Nm (33–41 ft-lb) |
| Rear shock upper mount | 25–30 Nm (18–22 ft-lb) |
| Rear shock lower mount | 25–30 Nm (18–22 ft-lb) |
Brakes
Drum brakes front and rear. 1978 CR125 brake hardware:
| Fastener | Torque |
|---|---|
| Front brake anchor bolt | 20–25 Nm (15–18 ft-lb) |
| Rear brake anchor bolt | 20–25 Nm (15–18 ft-lb) |
Anti-Seize Use on Vintage MX Hardware
For the 1978 CR125, applying a small amount of anti-seize to spark plug threads and axle threads is a sound practice for a bike of this age. Anti-seize prevents galvanic corrosion between steel fasteners and aluminium bosses, which can cause fasteners to seize and strip threads when removed. Remember that anti-seize changes the effective clamping achieved at a given torque value—reduce your applied torque by 10–15% when torquing lubricated threads to compensate for the reduced friction coefficient.
Related Shopping Categories
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Shop Penetrating Oil for a 1978 Honda CR125 Dirt Bike.
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.
