1991 Honda CR80 Torque Specs
Shop parts for a 1991 Honda CR80 Dirt Bike.
The 1991 Honda CR80 represented a well-developed stage of the youth motocross platform, with Honda having refined the suspension and chassis over multiple seasons of competition feedback. The liquid-cooled power-valve two-stroke continued to give junior riders genuine competitive performance. Maintaining a ’91 CR80 to correct torque specifications keeps the small-displacement machine performing as intended.
Engine Fasteners
At this point in the CR80’s evolution, the power valve system was a reliable, well-understood feature of the engine. The valve cover bolts should be part of every top-end inspection schedule—the valve itself can gum up with carbon deposits if neglected, and loose cover bolts accelerate that process.
| Fastener | Torque (ft-lb) | Torque (Nm) |
|---|---|---|
| Spark plug | 9–11 | 12–15 |
| Cylinder head bolts | 11–14 | 15–19 |
| Cylinder base bolts | 11–14 | 15–19 |
| Power valve cover bolts | 5–7 | 7–10 |
| Water pump cover bolts | 7–9 | 10–12 |
| Flywheel nut | 22–29 | 30–39 |
| Clutch hub nut | 22–29 | 30–39 |
Chassis & Suspension
| Fastener | Torque (ft-lb) | Torque (Nm) |
|---|---|---|
| Fork clamp bolts | 9–11 | 12–15 |
| Handlebar clamp bolts | 11–14 | 15–19 |
| Swingarm pivot nut | 36–43 | 49–59 |
| Rear shock mount bolts | 18–22 | 25–30 |
Wheels & Drive
| Fastener | Torque (ft-lb) | Torque (Nm) |
|---|---|---|
| Front axle nut | 22–29 | 30–39 |
| Rear axle nut | 36–43 | 49–59 |
| Rear sprocket nuts | 18–22 | 25–30 |
| Chain adjuster lock nuts | 7–11 | 10–15 |
Brakes
| Fastener | Torque (ft-lb) | Torque (Nm) |
|---|---|---|
| Front brake plate bolt | 9–11 | 12–15 |
| Rear brake plate bolt | 9–11 | 12–15 |
A properly maintained 1991 CR80 is a capable, confidence-building racing machine. Use torque values consistently across every service, and check the power valve and cooling system fasteners regularly given the intensity of youth motocross racing cycles.
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.
