Did you know?
- The valve clearance on your Yamaha YZ or WR should be checked every 3 races or 500 km of use.
- After 5 races or 1,000 km of use the piston rings should be replaced and the top end should be inspected.
- Not Properly maintaining a modern four-stroke can create an extremely expensive repair bill.
- Riding your Yamaha is more fun than spending a bucket load of money fixing something you could have prevented with a little time and the right information.
The Cyclepedia.com Yamaha YZ and WR 400, 426, and 450 online motorcycle service manual features detailed full-color photographs and wiring diagrams, complete specifications with step-by-step procedures performed and written by a veteran Yamaha dealer trained motorcycle technician.
Dealers can access this manual through our Cyclepedia PRO Product. If you are a dealer and would like access to all of our online manuals for one low price please Click Here.
The Yamaha YZ WR 400, 426, 450F online motorcycle manual covers the following off-road and motocross motorcycles:
1998 Yamaha YZ400FK
1998 Yamaha WR400FK
1999 Yamaha YZ400FL
1999 Yamaha WR400FL
2000 Yamaha YZ426FM
2000 Yamaha WR400FM
2001 Yamaha YZ426FN
2001 Yamaha WR426FN
2002 Yamaha YZ426FP
2002 Yamaha WR426FP
2003 Yamaha YZ450FR
2003 Yamaha WR450FR
2004 Yamaha YZ450FS
2004 Yamaha WR450FS
2005 Yamaha YZ450FT
2005 Yamaha WR450FT
Access the Yamaha YZ WR 400, 426, 450 Online Motorcycle Manual Now- CLICK HERE!
When you subscribe to our Yamaha YZ and WR 400, 426, and 450 online motorcycle manual you’ll get instant access to the following information:
Periodic Maintenance – Periodic Maintenance Chart, Clutch Cable Adjustment, Throttle Free Play, Engine Idle Speed, Drive Chain Adjustment, Hot Start Lever, Clutch Replacement, Engine Oil, Spark Plug, Compression Check, Air Filter Servicing, Transmission Oil, Tires, Brake Bleeding, Valve Clearance
Cooling System – Cooling System Specifications, Coolant, Radiators, Water Pump
Quick Reference
YZ450F Specifications
WR450F Specifications
YZ426F Specifications
WR426F Specifications
YZ400F Specifications
WR400F Specifications
VIN and Engine Number Location
General Torque Specifications
External Components
Side Covers
Seat
Fuel Tank
Brake Pedal
Brake Pedal
Front Number Plate
Handlebar
Sub Frame
Front Fender
Rear Fender
Exhaust System
Engine
Engine Specifications
Balancer
Cylinder Head Cover
Cylinder Head
Camshaft Inspection
Camshaft Removal
Camshaft Installation
Kick Starter
Cylinder and Piston
Clutch
Left Engine Components
Right Engine Components
Engine Removal
Engine Installation
Crankshaft
Crankcase Splitting
Crankcase Assembly
Transmission Removal
Transmission Assembly
Crankcase Assembly
Engine Installation
Final Drive
Final Drive Specifications
Drive Chain
Engine Sprocket
Rear Wheel Sprocket
Front Brake
Brake Disc
Front Brake Specifications
Front Brake Caliper
Front Brake Replacement
Rear Brake
Rear Brake Caliper
Rear Brake Replacement
Rear Brake Specifications
Wheels
Wheel Specifications
Front Wheel
Rear Wheel
Bearing Replacement
Steering
Removal
Bearing Replacement
Installation
Front Suspension – Fork Removal and Installation, Front Fork Assembly, Front Fork Disassembly, Fork Seal Replacement, Front Fork Specifications
Rear Suspension – Shock Removal and Installation, Specifications, Swing Arm
Electrical System
Electrical Specifications
Ignition System
Headlight
Switches
Color Wiring Diagrams
Online Yamaha YZ and WR 400, 426, and 450 Parts Diagrams
Troubleshooting
admin says
The Cyclepedia Yamaha YZ450F manual I bought is one of the greatest motorcycle repair manuals online ever created. Pick your model, see step by step instructions with pics of real mechanics doing real repairs….Awesome…. – R. Perry
admin says
I have a 1999 Yamaha WR400 and I bought your online manual. You have a great product. I love the pictures! Much better than some other manuals I’ve had. I would recommend your service to everyone even though I had a few difficulties (which were responded to). – Kevin V.
gription says
I have purchased 3 of your cyclepedia.com online manuals (WR / YZ 450, DRZ400, and KDX200) and have loved them and told all my friends about them – R. Malouff.
admin says
I subscribed to your Yamaha WR manual thinking I was going to get some poor quality pirated Yamaha manual in PDF form. What a surprise to see color photos accompanied by really detailed instructions. This is the best manual I have ever owned! Thanks for your honesty. – Daniel
admin says
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admin says
I have found your Yamaha YZ online manual to be helpful and a one of a kind product. Keep up the good work! – R. Bergh
admin says
I’ve used your online Yamaha WR400F manual to do a head gasket replacement, valve shim and clearance check. The steps to do this were easy to follow and pictures are high quality. This is the best money I’ve spent on my WR so far! Very happy. – Shane
admin says
It isn’t often that I take the time to write a company about a product. I want to thank you for writing such a comprehensive repair manual for the YZ450 and for putting it online. Very impressed. G. Hoskings
admin says
Good product. Your online Yamaha YZ450 manual has good detail. Thank you. JP Roteux
admin says
My local Yamaha dealer wanted $80 for the factory service manual – they can keep it! Anyways – just wanted to say thanks for the great resource. I’m very impressed with what you all have put together…color photos are awesome…the Cyclepedia YZ450 manual was money well spent! Thanks!! T Berry