First Four Stroke Motocross Bike The Yamaha YZ400F 
1999 Yamaha YZ400F MX Auction (0001-50007837) | Grays Australia
Yamaha YZ400F '1998–2000
Yamaha Yz400f | Cycle World | MARCH 1998
The game changer: Yamaha YZ400F - Australasian Dirt Bike Magazine
For Sale | 1998 Yamaha YZ400F 399cc-For Sale
1998 Yamaha YZ400F - Like New - $2,000 - For Sale/Bazaar - Motocross Forums / Message Boards - Vital MX
Church of MO: 1998 Yamaha YZ400F | Motorcycle.com
YAMAHA YZ400F YZ 400F 1998 1999 2000 SERVICE REPAIR SHOP MANUAL
Yamaha YZ400F 1998 Specs
1998 Yamaha YZ400F Classic Motocross Review
1998 Yamaha YZ400F: READER'S RIDE - Australasian Dirt Bike Magazine
The Motocross Vault - Yamaha's lovely home market 1998 YZ400F. I loved this color scheme and I was bummed you couldn't get it here in the US at the time. | Facebook
1998 YAMAHA 400CC YZ400F - JBW3438095 - JUST BIKES
1998 Yamaha YZ400F - Like New - $2,000 - For Sale/Bazaar - Motocross Forums / Message Boards - Vital MX
Yamaha YZ400F Flat Tracker – BikeBound
Yamaha YZ400F 1999 (X) USA information
Andrea Bartolini's 1999 Factory Yamaha YZ400F | Andrea Barto… | Flickr