1987 Honda CR125 Torque Specs: Late-80s MX Fastener Reference
Shop parts for a 1987 Honda CR125 Dirt Bike.
The 1987 Honda CR125 builds on the redesigned 1986 platform with further refinements to the two-stroke engine and suspension setup. By 1987, the CR125 had become a genuinely competitive and well-rounded production MX bike, and the handling and power improvements over the early 1980s models are substantial. For vintage MX riders and collectors, the late-1980s CR125 models are capable machines that can still compete effectively in vintage MX events. Maintaining correct torque specifications keeps the bike performing as Honda designed it.
Engine Fasteners
Two-stroke premix, no oil drain plug. 1987 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) |
Brakes
Front disc and rear drum. Keep front caliper and disc hardware at spec for reliable stopping power.
| 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) |
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 | 28–35 Nm (21–26 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) |
Torque Sequence for Vintage MX Fork Clamps
On the 1987 CR125, the fork clamping system uses both upper and lower triple clamp bolts. When torquing the fork clamps after removing and reinstalling the fork, always start with the lower clamp bolts and verify fork leg alignment (equal height on both sides) before finalizing the upper clamp bolts. Uneven fork leg height changes the front suspension geometry and creates uneven handling through turns and over jumps. Use a tape measure from the axle to the lower triple clamp to verify symmetry before final torquing.
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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.