1978 Harley-Davidson MX-250

Engine: Aermacchi 242.6 cc (0.2 L) Two-Stroke One-Cylinder
Cooling System: Air-Cooling
Ports: Five
Power: 32.41 HP at 9,000 RPM
Torque: 18.91 lb-ft at 9,000 RPM
Compression Ratio: 11.8:1
Carburetor: Dell’Orto PHB E 38
Venturi Diameter: 38 mm
Main/Pilot/Starting Jets: 155/70/75
Throttle Valve: 40
Jet Needle: K2
Needle Jet: 26C AB
Air Screw Setting: 1.5 turns
Air Filter: Polyurethane Foam Element
Bore: 72.0 mm
Stroke: 59.6 mm
Lubrication System: Fuel and Oil Mixture 20:1
Starter System: Primary Kick
Ignition: CDI Dansi/CDI Motoplat
Ignition Timing: 0.100 in. (2.5 mm or 21°) before Top Dead Center
Trigger Air Cap: (Dansi) 0.012-0.016 in.
Spark Plug: Champion N59G
Spark Plug Electrode Gap: 0.020 in. (0.5 mm)
Battery: None
Transmission: 5-Speed Manual
Clutch: Wet, Multi-Plate
Primary Drive Pinion/Crown Wheel Gear: 22 teeth/60 teeth
Primary Reduction: 2.73
Gear Ratio: 1 - 14/28, 2 - 18/28, 3 - 21/26, 4 - 21/21, 5 - 23/19
Shift Pattern: One Down, Four Up
Gearbox Sprocket: 14 teeth
Chain Type: Regina HP 5/8 by 3/8
Weight: 253 lbs.
Length: 83.6 in.
Handlebar Width: 34.2 in.
Ground Clearance: 12.0 in.
Wheelbase: 57.3 in.
Seating Capacity: One Driver
Seat Height: 34.2 in.
Steering Angle: 45° Left and Right
Steering Head Angle: 30°
Trail: 5.5 in.
Body Material: Plastic
Fender Maker: NAVA/Preston Petty
Frame: Double Downtube
Suspension Manufacturer: KYB
Front Suspension: Telescopic, Oil-Dampened with 9 in. of Travel
Rear Suspension: Swinging Arm, Oil-Dampened with 6 in. of Shock Travel and 9 in. of Wheel Travel
Fuel Tank Capacity: 2.2 gallons
Transmission Fluid: 1.0 quart
Front Forks: 36 mm Diameter, 210 cc Capacity
Original Tire Manufacturer: Cheng Shin
Front Wheel Tire: 3.00 by 21
Rear Wheel Tire: 4.40 by 18
Brakes: Drums, Internal Expanding, Single Leading Shoe Type, 140 mm by 25 mm
Rims: Akront, Shoulderless Light Alloy
Spokes: 36 per Wheel, 4 mm Diameter
Hub Manufacturer: Leleu
Tire Pressure (front and rear): 10 PSI
VIN Number: 7DxxxxxH8
Rarity: One of Approximately 1,000 MX-250’s