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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
1 X STEEL ENGINE VALVE (INTAKE-CENTER) YAMAHA YZF400 1998-1999 / WRF400 1998-2000
£24.75
The valve that decides how cleanly your engine breathes in.
2 X STEEL ENGINE VALVES (EXHAUST) YAMAHA YZF400 1998-1999 / WRF400 1998-2000
£49.50
The valve that decides how cleanly your engine breathes out.
2 X STEEL ENGINE VALVES (INTAKE) YAMAHA YZF400 1998-1999 / WRF400 1998-2000
£49.50
The valve that decides how cleanly your engine breathes in.
9.48MM HOT CAMS SHIM KIT 1.20-3.50 IN 0.05MM INCREMENTS 3 OF EACH SIZE
£94.75
The small parts that keep your valves precisely in tune.
ACCELERATOR REBUILD KIT YAMAHA YZF400 1998-1999 WRF400 1998-2000, WRF426 2001-2002 / YZF426 2000-2002
£27.98
A small, cheap fix that brings the throttle back to life.
AIR FILTER WRP YAMAHA WRF 250 2001-2002 YZF/WRF 400/426 1998-2002
£16.87
The simplest way to add years to your engine's life.
BRAKE PADS (FRONT) YAMAHA YZF400 1998-1999 / WRF400 1998-2000 PROX
£19.75
Fresh pads, fresh confidence into every braking bump.
BRAKE PADS (REAR) YAMAHA YZ125 1990-1997 / YZ250 1989-1997 / YZF400 1998 / WR250 1991-1997 / WRF400 1998 PROX
£19.75
Fresh pads, fresh confidence into every braking bump.
CALIPER PISTON KIT (FRONT) ALL BALLS 18-9006
£41.74
Fixes the problem at its source, not just the symptom.
CALIPER REPAIR KIT (FRONT) YAMAHA YZF WRF 250 / 400 / 426 / 450 1998 - 2006 YZF 450 2003 - 2007
£27.82
Fix it before it fails you mid-moto.
CALIPER REPAIR KIT (REAR) YAMAHA YZ 125 1991-1997
£27.18
Fix it before it fails you mid-moto.
CALIPER REPAIR KIT (REAR) YAMAHA YZF400 1999-2000 / YZF426 2000-2002 / WRF426 2001-2002
£27.82
Fix it before it fails you mid-moto.
CAMSHAFT (EXHAUST) YAMAHA WRF 400/426 YZF 400/426
£218.44
One of the cheapest, easiest ways to add real power.
Currently unavailable View product →
CAMSHAFT (INTAKE) YAMAHA WRF 400/426 YZF 400/426
£218.44
One of the cheapest, easiest ways to add real power.
CARBURETOR REBUILD KIT YAMAHA YZF400 1998-1999
£74.95
Check this before you blame the engine.
CHAIN ROLLER - (LOWER) - YAMAHA YZ125 YZ250 1987-ON / YZF250 2001-2022 / YZF400 1998-1999 / YZF426 2000-2002 / WR250 1991-1997 / WRF250 2001-2022 / WRF400 1999-2000 / WRF450 2003-2022
£25.36
Small roller, big difference to chain life.
CHAIN ROLLER - (UPPER) - YAMAHA YZ125 YZ250 WR250 YZF250 YZF426 YZF450 WRF250 WRF400 WRF426 WRF450
£24.15
Keeps the power running smoothly from sprocket to sprocket.
CLUTCH BASKET YAMAHA YZF400 1998-1999 / WRF400 1998-2000 PROX
£195.20
The part that decides whether your new clutch plates last.
COMPLETE GASKET KIT YAMAHA YZF400 1998-1999 / WRF400 1998-1999
£109.57
One kit, every seal, no repeat trips to the parts counter.
CONNECTING ROD YAMAHA YZF400 1998-1999 / WRF400 1998-2000
£135.00
Stops big-end knock from ever coming back.
COUNTER BALANCER KIT HOT RODS YAMAHA YZF400 YZF426 YZF450 / WRF400 WRF426 WRF450 BBK0011
£45.00
A smoother engine is a faster, more comfortable one.
COUNTER SHAFT SEAL KITS YAMAHA YZF400 / YZF426 / YZF450 2003-2017 / WRF400 / WRF426 / WRF450 2003-2018
£27.49
Small seal, big protection for your gearbox.
FLOAT BOWL GASKET (ONLY) 46-5037 ALL BALLS
£16.50
A small gasket that stops a big fuel leak.
FORK BUSHING KIT YAMAHA YZ125 YZ250 1996-2003 / YZF250 WRF250 2001-2003 / YZF400 1998-1999 / YZF426 2000-2002 / WRF450 YZF450 2003 / WRF400 1998-2000 / WRF426 2001-2002
£46.89
The unseen part that decides how planted your front end feels.
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