HONDA CRF450R 2021

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

0.5

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

4 Stroke Engine 450 cc

FORKS INFO

Fork Manufacturer

: Showa USD 49 mm OD

Fork Dimensions

Compression Nut Torque: 24 in-lb (0.29 kgf-m)
Fork Travel: 310 mm

Fork Features

Preload Adjuster: 3 mm Range
Twin Chamber Fork: Yes

Fork Oil

Fork Oil Weight: SAE 5
Fork Oil Level: 350cc mm
Oil Quanity: 2 Litres

Fork Spring Information

Spring Rate – Claimed: 4.8N
Standard Preload: 3 mm

SHOCKS INFO

Shock Manufacturer

SHOWA: 50 mm ID

Shock Dimensions

Nitrogen Pressure: 145 psi
Shock Shaft Outer Diameter: 16 mm
Standard Sag: 40 mm
Shock Oil: 2.5 Weight

Shock Features

Non-rebuildable: No

Shock Comments

: Check rebound adjuster.

CHASSIS PARTS

11 Parts

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FACTORY RACING KIT SUSPENSION

10 Parts

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COMPLETE FRONT FORKS

3 Parts

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FORK CARTRIDGE KITS

1 Parts

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FORK REBUILD KITS

2 Parts

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FORK UPGRADE PARTS

10 Parts

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

7 Parts

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FORK CARTRIDGE ASSEMBLY PARTS

7 Parts

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FORK SEALS & BUSHES

17 Parts

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FORK COMPRESSION ADJUSTER ASSY

16 Parts

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FORK CARTRIDGE ROD PARTS

12 Parts

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FORK UPPER & LOWER TUBE PARTS

14 Parts

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FORK O-RINGS

9 Parts

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COMPLETE SHOCKS

3 Parts

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SHOCK REBUILD KITS

1 Parts

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SHOCK UPGRADE PARTS

8 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

8 Parts

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SHOCK SEAL CASE PARTS

19 Parts

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SHOCK SHAFT PARTS

11 Parts

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SHOCK BODY PARTS

9 Parts

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SHOCK PISTON PARTS

2 Parts

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SUSPENSION LOCKNUTS & BUSHES

21 Parts

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PERFORMANCE COATINGS

4 Parts

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TOOLS & LUBRICANTS

21 Parts

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