YAMAHA YZ65 2018

Calculate Spring Rates

Rider Weight

This is a recommendation only please consult your manual

Ideal Fork Rate:
kg/mm ( N/mm)
Ideal Shock Rate:
kg/mm ( N/mm)

Bike Details

Stock Fork Spring Rate


Stock Shock Spring Rate


Bike Type


Engine Specifications

2 Stroke Engine 64.8 cc

Forks Info

Fork Manufacturer

KYB USD 36 mm OD

Fork Dimensions

Compression Nut Torque
25 in-lb (0.29 kgf-m)
Fork Travel
215 mm

Fork Features

Twin Chamber Fork

Fork Oil

Fork Oil Weight
Fork Oil Level
90 mm
Oil Quanity
1 Litre

Fork Spring Information

Standard Preload
5 mm

Fork Comments

Oil level set with the gap between the inner and outer fork tube empty.

Shocks Info

Shock Manufacturer

36 mm ID

Shock Dimensions

Nitrogen Pressure
142 psi
Shock Shaft Outer Diameter
14 mm
Standard Sag
85 mm
Shaft Nut Torque
20 ft-lbs (27 NM)
Shock Oil
2.5 Weight
Standard Preload
Wheel Travel
269 mm

Shock Features


Shock Comments

4.2 stock spring too stiff for 35kg rider

Fork Tube Slide Bushing Pair - 36mm Forks - YZ85

Yamaha 2019+ YZ 65/85
(SKU: 110043600202)
Inside Diameter d (mm):   36.0
Fork Inner Tube Ø d (mm):   36.0
Height H (mm):   12.0
Outside Ø D (mm):   40.0
Wall Thickness (mm):   2.0
18 In Stock

SKF 36mm KYB Fork Seal & Wiper Set

Requires 2 kits for complete fork service.
Colour:   Green
Seal Outer Ø D (mm):   48.40
Seal Height H (mm):   8.0
Seal Wiper Outside Ø D1 (mm):   48.80
Seal Wiper Height H1 (mm):   5.7
Fork Inner Tube Ø d (mm):   36.0
5 In Stock

InnTeck Inner Slide Fork Bush KAYABA 36mm

KAYABA 36mm 35x37x20
Inside Diameter d (mm):   35.0
Fork Inner Tube Ø d (mm):   36.0
Height H (mm):   20.0
Outside Ø D (mm):   37.0
Wall Thickness (mm):   1.0
1 In Stock