Specifications and workshop reference information for the 1980 Honda XL500, including engine, chassis, service data and setup details.
Note: Specs are compiled from factory data, manuals and owner feedback. Bikes vary — if yours is different, jump into the forum and share it.
| Engine Type | Air-cooled, 4-stroke, single-cylinder, OHC, 4-valve |
| Displacement | 497 cc |
| Bore × Stroke | 89.0 × 80.0 mm |
| Compression Ratio | 8.5:1 |
| Maximum Power | Approx. 32 hp |
| Maximum Torque | |
| Carburetor | Keihin | Replacement Options |
| Lubrication | Dry sump |
| Fuel Mix Ratio | |
| Ignition | CDI |
| Spark Plug | NGK DPR8Z |
| Spark Plug Gap | 0.6–0.7 mm |
| Valve Clearance (Intake) | 0.05 mm |
| Valve Clearance (Exhaust) | 0.10 mm |
| Transmission Type | 5-speed manual |
| Clutch | Wet multi-plate |
| Final Reduction | Chain drive |
| Overall Length | 2,200 mm |
| Overall Width | 900 mm |
| Overall Height | 1,220 mm |
| Wheelbase | 1,450 mm |
| Ground Clearance | 300 mm |
| Fuel Tank Capacity | 9.5 L |
| Bearing Sizes | Bearing Finder |
| Frame Type | Steel single cradle |
| Front Suspension | Telescopic forks | Fork Oil Levels |
| Rear Suspension | Dual shock swingarm |
| Front Suspension Travel | |
| Rear Suspension Travel |
| Front Tire | 3.00-21 | Tyre Size Guide |
| Rear Tire | 4.60-18 | Tyre Size Guide |
| Front Brake | Drum brake |
| Rear Brake | Drum brake |
| 1981 Honda XR500 |
| 1982 Honda XR500 |
| 1982 Honda XL500 |
| 1983 Honda XR500 |
| 1984 Honda XR500 |
| 1973 Yamaha SC500 |
The 1980 Honda XL500 sits in an important period of Honda off-road history, when big-bore four-stroke singles were proving they still had plenty to offer in a world increasingly dominated by two-strokes. Strong, simple and capable of covering everything from road miles to rough trails, the XL500 helped establish the formula that would later become synonymous with Honda's large XR models.
Power came from an air-cooled 498 cc four-stroke single-cylinder engine. Rather than relying on screaming revs, the XL500 delivered the broad, usable torque that made big Honda singles so enjoyable in the dirt. The engine was matched to a five-speed transmission and, importantly for owners today, remained mechanically straightforward enough to be maintained without exotic equipment.
Starting technique became part of the big-single experience. A correctly tuned XL500 could be perfectly cooperative, but poor carburettor adjustment, ignition problems or incorrect starting procedure could turn kicking one into a serious workout. After more than four decades, owners should expect that carburettors may have been rejetted, worn or modified. The VMXOwners carburettor reference and replacement guide is useful when investigating what is currently fitted rather than assuming it remains factory original.
The XL500's chassis reflected its dual-purpose role. Long-travel conventional telescopic forks, twin rear shock absorbers and a 21-inch front wheel gave it genuine off-road ability, while lighting, road equipment and a more substantial build separated it from Honda's competition-oriented machinery.
For restoration work, suspension deserves particular attention. Fork oil that has been sitting for years bears little resemblance to proper suspension fluid, while seals, bushes and fork tubes may all require inspection. The VMXOwners fork oil reference provides a useful starting point when servicing older conventional fork systems.
The twin-shock rear end also places the 1980 XL500 firmly in the classic era. Original shocks may look serviceable externally while offering very little damping after decades of use. Restorers aiming for a bike that actually rides well should consider suspension condition as seriously as paint, decals and engine cosmetics. The rear suspension reference guide can help when assessing repair and replacement options.
Another area worth checking is final-drive gearing. XL500s have often been modified during their lives, particularly when owners wanted lower gearing for trail riding or taller gearing for road use. Before buying replacements, count the teeth on both existing sprockets and inspect the chain as a complete system. VMXOwners' chains and sprockets reference provides additional information for owners sorting out an ageing drivetrain.
Today, the 1980 XL500 appeals for reasons beyond outright performance. It comes from an era when a large trail bike could be rugged, relatively uncomplicated and genuinely useful on both dirt and bitumen. There were no electronic riding modes, fuel injection systems or complicated dashboards — just a big piston, carburettor, five gears and a substantial kickstarter.
The XL500 also represents an important step toward the big Honda four-stroke off-road machines that followed. Its descendants would become legends in trail riding, desert racing and adventure riding.
More than 45 years later, a well-sorted XL500 still demonstrates why the big Honda single became such an enduring formula: plenty of torque, straightforward engineering and an ability to keep going long after fashions changed.
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