1988 Kawasaki KX80
Specifications and workshop reference information for the 1988 Kawasaki KX80, 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.
General Specifications
| Engine Type | 2-stroke, single cylinder, piston reed valve, liquid-cooled |
| Displacement | 82 cc |
| Bore x Stroke | 48.0 x 45.8 mm |
| Compression Ratio | 9.5 : 1 |
| Carburetor | Mikuni VM29SS |
| Ignition | CDI system |
| Ignition Timing | 11° BTDC @ 12,000 rpm |
| Spark Plug | NGK B9EG / BR9EG |
| Port Timing | Inlet 62.5° BBDC / Scavenging 62.5° ABDC / Exhaust 93.5° BBDC |
| Lubrication | Petrol mix (32:1) |
| Starting System | Primary kick |
Transmission
| Transmission Type | 6-speed constant mesh |
| Primary Reduction | 3.400 (68/20) |
| Clutch Type | Wet, multi-disc |
| Gear Ratios | 1st 2.538 / 2nd 1.875 / 3rd 1.500 / 4th 1.250 / 5th 1.090 / 6th 0.956 |
| Final Drive | Chain |
| Final Ratio | 3.769 (49/13) |
| Overall Drive Ratio | 12.258 (Top gear) |
| Transmission Oil | SE class SAE 10W-30 or 10W-40 (0.7 L) |
Dimensions
| Overall Length | 1815 mm |
| Overall Width | 745 mm |
| Overall Height | 1065 mm |
| Seat Height | 860 mm |
| Wheelbase | 1225 mm |
| Ground Clearance | 330 mm |
| Dry Weight | 63 kg |
| Fuel Capacity | 4.1 L |
Chassis
| Frame Type | Tubular, single down tube |
| Caster Angle | 45° |
| Trail | 98 mm |
Suspension
| Front Suspension | Telescopic fork (air fork) |
| Rear Suspension | Swingarm (Uni-Trak) |
| Front Wheel Travel | 275 mm |
| Rear Wheel Travel | 275 mm |
Brakes
| Front Brake | Disc brake (170 mm) |
| Rear Brake | Drum brake |
Wheels & Tyres
| Front Tyre | 70/100-19 |
| Rear Tyre | 90/100-14 |
Community
VMX Owners Forum
Discuss vintage motocross bikes, restorations, tuning and riding.