Model:  YAMAHA YZ400 1978

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

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 400 cc

FORKS INFO

Fork Manufacturer

KYB Conventional 38 mm OD

Fork Oil

Fork Oil Weight
SAE 7.5
Fork Oil Level
130 mm
Oil Quanity
1 Litre

Fork Spring Information

Standard Preload
10 mm

SHOCKS INFO

Shock Manufacturer

Soqi
46 mm ID

Shock Dimensions

Nitrogen Pressure
175 psi
Shock Shaft Outer Diameter
22 mm
Standard Sag
103 mm
Shaft Nut Torque
25 ft-lbs (34 NM)
Shock Oil
5 Weight

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