These are the known mechanical and performance specifications for your 1988 Yamaha SRX 6 (reduced effect).
Basic Specs

Engine
Displacement608.00 ccm (37.10 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression8.5:1
Bore/Stroke96.0 x 84.0 mm (3.8 x 3.3 inches)
Valves/Cylinder4
Fueling
Ignition
Exhaust
Lubrication
CoolingAir
Performance
Horespower27.00 HP (19.7 kW)
Torque
Top Speed150.0 km/h (93.2 mph)
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity15.00 litres (3.96 gallons)
Emissions
Chassis
Frame Type
Rake
Trail
Front Suspension
Front Travel
Rear Suspension
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance
Wheelbase
Dry Weight
Wet Weight172.0 kg (379.2 pounds)
Wheels & Brakes
Front Tire/Tyre100/80-18
Rear Tire/Tyre120/80-18
Front BrakesDual disc
Front Brake Diameter
Rear BrakesSingle disc
Rear Brake Diameter
Wheels
Comments