Yamaha YFM90RA Model Vehicle User Manual


 
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SPEC
Item Standard
Fuel
Type Unleaded gasoline only
Fuel tank capacity 4.8 L (1.06 lmp gal, 1.27 US gal)
Fuel reserve amount 1.0 L (0.22 Imp gal, 0.26 US gal)
Carburetor
Type/quantity SVR 22-1G x 1
Manufacturer TK
Spark plug
Type/manufacturer NGK/CR7HSA
Spark plug gap 0.6 ~ 0.7 mm (0.024 ~ 0.028 in)
Clutch type Dry, centrifugal automatic
Transmission
Primary reduction system V-belt
Primary reduction ratio 2.47-0.61:1
Secondary reduction system Spur
Secondary reduction ratio 41/15 × 45/13 (9.462)
Third reduction system Chain drive
Third reduction ratio 28/13(2.154)
Transmission type V-belt automatic
Chassis
Frame type Steel tube frame
Caster angle 4°00’
Camber angle –0°30’
Kingpin angle 18°00’
Trail 16 mm (0.63 in)
Tread (STD) front 710 mm (27.95 in)
rear 655 mm (25.79 in)
Toe-in (with tires touching the ground) 15 mm (0.59 in)
Tire
Type Tubeless
Size front AT18 × 7-8
rear AT18 × 9-8
Manufacturer front MAXXIS
rear MAXXIS
Type front M939
rear M940
Tire pressure (cold tire)
Maximum load* 70.0 kg (154 lb)
Off-road riding front 22 ~ 25 kPa (0.22 ~ 0.25 kgf/cm, 3.2 ~ 3.6 psi)
2
rear 22 ~ 25 kPa (0.22 ~ 0.25 kgf/cm, 3.2 ~ 3.6 psi)
2
*Load in total weight of rider and
accessories
GENERAL SPECIFICATIONS