Model:  YAMAHA YZ400F 1999

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

0.46

Stock Shock Spring Rate

5.4

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

4 Stroke Engine 400 cc

FORKS INFO

Fork Manufacturer

KYB USD 46 mm OD

Fork Dimensions

Compression Nut Torque
48 in-lb (0.56 kgf-m)

Fork Features

Twin Chamber Fork
No

Fork Oil

Fork Oil Weight
SAE 5
Fork Oil Level
110 mm
Oil Quanity
2 Litres

Fork Spring Information

Spring Rate – Claimed
0.46
Standard Preload
8 mm

SHOCKS INFO

Shock Manufacturer

KYB
46 mm ID

Shock Dimensions

Nitrogen Pressure
142 psi
Shock Length (Eye to Eye)
482 mm
Shock Travel
141 mm
Shock Shaft Outer Diameter
16 mm
Standard Sag
103 mm
Shaft Nut Torque
25 ft-lbs (34 NM)
Shock Oil
2.5 Weight
Standard Preload
8

Shock Features

Non-rebuildable
No

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