Suspension Parts for YAMAHA YZ490 1988 – Shocks, Forks & Upgrades

Discover suspension parts guaranteed to fit the 1988 YAMAHA YZ490. Every product in this category has been validated against year-specific fork and shock specifications to ensure true compatibility.
You’ll find fork components, shock parts, shims, upgrade kits, complete suspension systems, chassis components, and the tools and fluids required for accurate servicing - all aligned with the suspension setup of the 1988 YAMAHA YZ490.

Use this page as a reliable reference when maintaining, rebuilding, or upgrading your bike’s suspension.

Bike-Specific Suspension Specifications & Setup Information

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

0.376

Stock Shock Spring Rate

5.8

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 490 cc

FORKS INFO

Fork Manufacturer

KYB Conventional 43 mm OD

Fork Dimensions

Compression Nut Torque
25 in-lb (0.29 kgf-m)

Fork Features

Twin Chamber Fork
No

Fork Oil

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

Fork Spring Information

Standard Preload
10 mm

SHOCKS INFO

Shock Manufacturer

Soqi
46 mm ID

Shock Dimensions

Nitrogen Pressure
142 psi
Shock Length (Eye to Eye)
420 mm
Shock Travel
119 mm
Shock Shaft Outer Diameter
14 mm
Standard Sag
103 mm
Shaft Nut Torque
25 ft-lbs (34 NM)
Shock Oil
5 Weight

Shock Comments

SEND to Teknik 16mm shaft conversion (call)

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Browse All 18 Products for YAMAHA YZ490 1988






HiCalibre

HiCalibre Fork Springs 36 x 505 Common Fitment CR KX RM CR 1980's 43mm fork

Proudly made in the USA
(SKU: 19-105)
$295.00
Special Order
SPECIAL ORDER Item from USA. 4-6 weeks delivery
SPECIAL ORDER Item from USA. 4-6 weeks delivery
$295.00
Special Order
SPECIAL ORDER Item from USA. 4-6 weeks delivery
SPECIAL ORDER Item from USA. 4-6 weeks delivery
$295.00
Special Order
SPECIAL ORDER Item from USA. 4-6 weeks delivery
SPECIAL ORDER Item from USA. 4-6 weeks delivery
$295.00
Special Order
SPECIAL ORDER Item from USA. 4-6 weeks delivery
SPECIAL ORDER Item from USA. 4-6 weeks delivery