YAMAHA YZ 80 1989        

Rider Weight in Kilograms:

Ideal Fork Rate: kg/mm

Ideal Shock Rate: kg/mm


Stock Fork Spring Rate: 0.213 kg/mm

Stock Shock Spring Rate: 4.40 kg/mm


Motocross


Minibike


Ideal Rider Weight 68 kg


2 Stroke Engine 80 cc


Shock Seal Head Assembly 40 x 12.5 x 15

Shock Seal Head Assembly 40 x 12.5 x 15

22-524-00

$88.00

Shock Preload Collar Spanner

Shock Preload Collar Spanner

93-015-00

$28.60

Outer Guide Bush 33 x 8 x 1.5

Outer Guide Bush 33 x 8 x 1.5

24-520-00

$38.50

Inner Slide Bush 33.5 x 15 x 1.0

Inner Slide Bush 33.5 x 15 x 1.0

24-662-00

$38.50

19-030 Motorcycle Fork Springs
RRP $218.90

Teknik Revalve Only. No Kit Available


33mm OD

Kayaba (KYB) Conventional 33mm OD


External

Top Out Type External


4.0

Emulator Preload Turns 4.0


64 N

Emulator Spring 64 N


33mm id x 15mm height x 1.0mm thick

Inner Bush Dimensions 33mm id x 15mm height x 1.0mm thick


33mm od x 8mm height x 1.5mm thick

Outer Bush Dimensions 33mm od x 8mm height x 1.5mm thick


0.213 kg/mm

Spring Rate - Measured 0.213 kg/mm


5 mm

Standard Preload 5 mm


7.5

Fork Oil Weight 7.5


110 mm

Fork Oil Level 110 mm


1 Litre

Oil Quantity 1 Litre


40mm ID

Soqi 40mm ID


Yes

Shock Linkage Yes


175 psi

Nitrogen Pressure 175 psi


5 Weight

Shock Oil 5 Weight


95 mm

Shock Travel 95 mm


12.5 mm

Shock Shaft Outer Diameter 12.5 mm


10 mm

Shock Shaft Outer Diameter at Valve 10 mm


85 mm

Standard Sag 85 mm


20 ft lbs (27 NM)

Shaft Nut Torque 20 ft lbs (27 NM)


393 mm

Shock Length (Eye to Eye) 393 mm


4.40 kg/mm

Spring Rate - Measured 4.40 kg/mm


0.00111

Slope of Spring Formula 0.00111


0.162

Y Intercept of Spring Formula 0.162