YAMAHA YZ250F 2015 Motorcycle Suspension Upgrades

CALCULATE SPRING RATES

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

4.6N

Stock Shock Spring Rate

52N

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

4 Stroke Engine 250 cc

FORKS INFO

Fork Manufacturer

: KYB USD 48 mm OD

Fork Dimensions

Compression Nut Torque: 48 in-lb (0.56 kgf-m)
Fork Travel: 300 mm

Fork Features

Preload Adjuster: 0 mm Range
Twin Chamber Fork: Yes

Fork Oil

Fork Oil Weight: SAE 2.5
Fork Oil Level: 350cc mm
Oil Quanity: 2 Litres

Fork Spring Information

Standard Preload: 3 mm

Fork Comments

: Check floating piston for cracking

SHOCKS INFO

Shock Manufacturer

KYB: 50 mm ID

Shock Dimensions

Nitrogen Pressure: 142 psi
Shock Travel: 136 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: 10
Wheel Travel: 300 mm

Shock Features

Non-rebuildable: No

Shock Spring Information

Spring Rate - Claimed: 52N kg/mm

Shock Comments

: Replace alloy shock collars with steel if binding.

CHASSIS PARTS

10 Parts

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PERFORMANCE PARTS

48 Parts

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FORK OVERHAUL KITS

5 Parts

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FORK SPRINGS
Ideal Fork Rate for kg: kg/mm ( N/mm)

9 Parts

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FORK CARTRIDGE ASSEMBLY PARTS

15 Parts

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FORK SEALS & BUSHES

19 Parts

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FORK COMPRESSION ADJUSTER ASSY

43 Parts

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FORK CARTRIDGE ROD PARTS

22 Parts

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FORK UPPER & LOWER TUBE PARTS

20 Parts

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FORK O-RINGS

18 Parts

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SHOCK OVERHAUL KITS

2 Parts

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SHOCK SPRINGS
Ideal Spring Rate for kg: kg/mm ( N/mm)

3 Parts

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SHOCK SPRING RETAINERS /BUMPERS

4 Parts

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SHOCK BLADDER PARTS

15 Parts

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SHOCK SEAL CASE PARTS

16 Parts

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SHOCK SHAFT PARTS

17 Parts

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SHOCK BODY PARTS

26 Parts

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SHOCK PISTON PARTS

11 Parts

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SHOCK COMP ADJUSTER PARTS

6 Parts

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SUSPENSION LOCKNUTS & BUSHES

35 Parts

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TOOLS & LUBRICANTS

45 Parts

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