1978 Honda CR250 Torque Specs: Vintage MX Fastener Guide
Shop parts for a 1978 Honda CR250 Dirt Bike.
The 1978 Honda CR250 Elsinore arrives at a pivotal moment in Honda’s MX development, as the company was preparing for the more significant design changes that would arrive in the early 1980s. The 1978 CR250 features a refined 250cc two-stroke engine with improved power characteristics and an updated chassis for better handling. As a late-Elsinore-era machine, the 1978 CR250 combines classic two-stroke character with Honda’s growing engineering sophistication. Proper torque maintenance on a bike of this vintage requires care and correct tools.
Wheels & Drivetrain
Late-1970s CR250 axle hardware uses metric fasteners that are smaller than modern MX bike equivalents. Handle carefully and verify thread condition before torquing.
| Fastener | Torque |
|---|---|
| Front axle nut | 35–45 Nm (26–33 ft-lb) |
| Rear axle nut | 60–70 Nm (44–52 ft-lb) |
| Rear sprocket nuts | 22–28 Nm (16–21 ft-lb) |
Engine Fasteners
Two-stroke premix, no oil drain plug. 1978 CR250 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 | 18–22 Nm (13–16 ft-lb) |
| Flywheel/rotor nut | 45–55 Nm (33–41 ft-lb) |
| Clutch hub nut | 45–55 Nm (33–41 ft-lb) |
Suspension & Frame
| Fastener | Torque |
|---|---|
| Fork clamp bolts | 20–25 Nm (15–18 ft-lb) |
| Handlebar clamp bolts | 20–25 Nm (15–18 ft-lb) |
| Swingarm pivot bolt/nut | 50–60 Nm (37–44 ft-lb) |
| Rear shock upper mount | 28–35 Nm (21–26 ft-lb) |
| Rear shock lower mount | 28–35 Nm (21–26 ft-lb) |
Brakes
Drum brakes front and rear on the 1978 CR250.
| Fastener | Torque |
|---|---|
| Front brake anchor bolt | 22–28 Nm (16–21 ft-lb) |
| Rear brake anchor bolt | 22–28 Nm (16–21 ft-lb) |
Anti-Seize on Vintage Two-Stroke Hardware
For the 1978 CR250, applying anti-seize compound to spark plug threads and axle threads is good practice when working on hardware that may be decades old. Anti-seize prevents galvanic bonding between steel fasteners and aluminium housings that can make future removal extremely difficult. When using anti-seize, reduce your torque value by approximately 10–15% to account for the reduced thread friction—anti-seize effectively acts like a lubricant, and the same torque reading results in higher clamping force on lubricated threads than on dry threads.
Related Shopping Categories
Shop Torque Wrenches for a 1978 Honda CR250 Dirt Bike.
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Shop Thread Locker for a 1978 Honda CR250 Dirt Bike.
Shop Additional Tools for a 1978 Honda CR250 Dirt Bike.
Shop Penetrating Oil for a 1978 Honda CR250 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.
