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Motocross Parts UK
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WRF 400

Shop now or a great range of WRF400 Yamaha OEM Aftermarket Parts for the engine rebuild and maintenance of your MX bike.

1998 1999 2000
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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.
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 YZ125 YZ250 1998-2002 / YZF250 2001-2003 / WRF250 2001-2002 / WRF400 1999-2000
£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 MID BODY GASKET KIT YAMAHA YZF426 WRF426
£26.94
Small gaskets, but they decide how well your bike actually runs.
CARBURETOR REBUILD KIT YAMAHA WRF400 1998-1999
£74.95
Check this before you blame the engine.
CARBURETOR REBUILD KIT YAMAHA WRF400 2000
£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.
CLUTCH CABLE YAMAHA YZF 250 2001 - 2002 WRF 250 2001 - 2014
£22.61
One of the simplest upgrades to how your bike feels in your hands.
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.
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