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Motocross Parts UK
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YZF 400

The YZ400F was introduced to the market in 1998 after a successful AMA season in 1997. At a top speed of around 130 mph, the YZ 400F produces 45 horsepower from 6,000 to 12,000 rpms!!! Some people may say that it's difficult to start. It's really simple after you learn the procedure. The firs...  show more

1998 1999
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Filter by part type
SUPERSPROX FRONT GROOVED SPROCKET YAMAHA YZ250 (99-24) YZF450 (03-24) WRF450 (03-24) CST-565
£14.98
Never replace just one part of the drivetrain - it wrecks the rest fast.
SUPERSPROX REAR ALUMINIUM SPROCKET YAMAHA YZ125/250 YZF250/450 WR125/250/250X WRF250/450 BLUE
£38.48
Never replace just one part of the drivetrain - it wrecks the rest fast.
SUPERSPROX REAR STEALTH SPROCKET YAMAHA YZ125 YZ250 WR125/200/250/500 BLUE RST-245-BLU
£65.80
Never replace just one part of the drivetrain - it wrecks the rest fast.
THROTTLE CABLE YAMAHA YZF400 1998-1999 / WRF400 1998-1999
£19.85
One of the simplest ways to sharpen how a bike feels to ride.
UFO TRAX TRIPLE DENSITY HALF WAFFLE GRIPS - BLUE
£17.50
Small change, big difference in how the bike feels in your hands.
UFO VIPER HANDGUARDS - REFLEX BLUE
WAS £34.99 £25.00
Cheap protection for the parts you use every second of every ride.
WATER PUMP REBUILD KIT (WITH GASKET) YAMAHA YZF400 1998-1999 / YZF426 2000-2002 / WRF400 1998-2000 / WRF426 2001-2002
£45.11
Don't cook your top-end rebuild - fix cooling first.
WHEEL SPACER KIT (FRONT) YAMAHA YZ125 1999-2001 / YZ250 1999-2001 / YZF250 2001 / YZF400 1998-1999 / YZF426 2000-2001
£29.62
A small spacer with a big say in front wheel feel.
WHEEL SPACER KIT (REAR) YAMAHA YZ125 1999-2001 / YZ250 1999-2001 / YZF250 2001 / YZF400 1999 / YZF426 2000-2001 / WRF250 2001
£40.11
A small spacer with a big say in rear wheel feel.
WHEEL SPACER KIT (REAR) YAMAHA YZ125/YZ250 1988-1998 / WR250 1991-1997 / WRF400 1998 / YZF400 1998
£40.11
A small spacer with a big say in rear wheel feel.
YAMAHA YZ YZF 125 250 426 450 STEERING STEM KIT BY PIVOT WORKS
£55.22
Smooth, confident steering starts at the head bearings.
YAMAHA YZF / WRF 400 / 426 1998 - 2002 BIG END BEARING 34 X 42 X 19.8
£27.65
The small part that decides whether your bottom end survives or fails.
YAMAHA YZF / WRF 400 / 426 1998-2002 VERTEX CAM CHAIN
£61.78
A small part that protects the whole top end.
YAMAHA YZF / WRF 450 2003-2024 MAIN BEARING KIT K022
£79.75
The part that decides whether your rebuild lasts one season or five.
YAMAHA YZF 400 / 426 1998-2000 SHOCK BEARING KIT
£37.49
The bearings that decide how plush your rear end really feels.
YAMAHA YZF 400 1998-1999 / YZF 426 2000 / WRF400 1998-2000 LINKAGE BEARING KIT INC. BOTTOM SHOCK BEARING BY PIVOTWORKS
£87.84
Smooth rear travel starts with the bearings that make it possible.
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