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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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FORK SEAL AND WIPER SET YAMAHA YZ125 YZ250 1996-2003 / YZF250 2001-2003 / YZF400 YZF426 / YZF450 2003 / WRF250 2001-2004 / WRF400 / WRF426 / WRF450 2003-2004 56-141
£34.90
Smooth, predictable forks, restored in one afternoon.
FUEL TAP REPAIR KIT YAMAHA YX65 YZ80 YZ85 YZ125 YZ250 YZF250 YZF400 YZF426 YZF450 60-1000
£19.06
The cheap fix for an annoyingly common leak.
FULL ENGINE OIL SEAL SET YAMAHA YZF400 1998-1999 / YZF426 2000-2002 / YZF450 2003-2005 / WRF400 1998-2000
£41.90
The unglamorous parts that keep everything else properly sealed.
HI FLO OIL FILTER YAMAHA YZF 250 (01-02) WRF 250 (01-02) YZF 426 (00-02)
£5.95
The cheapest insurance your engine will ever get.
HOT RODS YAMAHA YZF / WRF 400 / 426 1998-2002 WATER PUMP KIT
£37.60
Don't cook your top-end rebuild - fix cooling first.
HOT RODS YAMAHA YZF WRF WATER PUMP SHAFT
£44.05
A small shaft that keeps your whole cooling system turning.
HOT RODS YAMAHA YZF450 2003-2013 / WRF450 2003-2015 WATER PUMP SHAFT
£44.05
A small shaft that keeps your whole cooling system turning.
LINKAGE BEARING KIT YAMAHA YZ125/YZ250 1993-2000 / WR250 1994-1997 / YZF400 1988-1999 / WRF400 1998-2000 / YZF426 2000
£75.11
Smooth rear travel starts with the bearings that make it possible.
MASTER CYLINDER REBUILD (REAR) SUZUKI RM250 1987-1992 / YAMAHA WRF400/YZF400 1998-1999
£28.42
Confidence at the rear pedal, restored from the inside out.
MASTER CYLINDER REBUILD KIT (FRONT) YAMAHA YZ125 YZ250 1996-2000 / YZF400 1998-1999 / YZF426 2000 / WR250 1997 / WRF400 1998-2000
£25.86
Fix it before it fails you mid-lap.
Currently unavailable View product →
MDR FRONT BRAKE DISC YAMAHA YZ WR 125 250 (92-00) YZF WRF (98-00) YZF 426 (00)
£51.96
The part that decides how confidently you can brake into a rut.
MDR PLASTIC THROTTLE TUBE KXF250 (04-ON) 450 (06-ON) RMZ260 (04-ON) 450 (05-ON)
£11.21
The part that decides how naturally your right hand controls the power.
MDR YAMAHA FACTORY BOLT KIT YZ/YZF/WRF (03-ON)
£49.90
The unglamorous kit that finishes every other job properly.
PISTON KIT YAMAHA WRF400 1998-2000 / YZF400 1998-1999 VERTEX
£165.84
Restore your power in an afternoon.
PISTON RING SET FOR STANDARD BORE YAMAHA YZF400 1998-1999 / WRF400 1998-2000 VERTEX
£49.55
Sometimes all a flat-feeling engine needs is fresh rings.
PROX CLUTCH PLATE (FRICTION PLATES) YAMAHA YZF400 1998-1999 / WRF400 1998-2000
£90.20
The part behind almost every clutch slip complaint.
PROX CLUTCH SPRING KIT YAMAHA YZF400 1998-1999 / WRF400 1998-2000
£26.38
Sometimes all a slipping clutch needs is fresh springs.
REAR SHOCK BEARING KIT (LOWER) YAMAHA YZ125 1989-1992 / YZ250 1990-1992
£24.09
A small bearing with a big say in how the rear end feels.
REAR SHOCK BEARING KIT (LOWER) YAMAHA YZ125/YZ250 1993-2000
£24.09
A small bearing with a big say in how the rear end feels.
REAR SHOCK BEARING KIT (LOWER) YAMAHA YZ80 1993-2001 / YZ85 2002
£24.09
A small bearing with a big say in how the rear end feels.
REAR SHOCK BEARING KIT (UPPER) YAMAHA YZF250 / YZF450
£28.37
A small bearing with a big say in how the rear end feels.
REAR SHOCK SEAL HEAD KIT YAMAHA YZ125/YZ250 1993-2005 / YZF250 2001-2005 / YZF400 1998-1999 / YZF426 2000-2002 / YZF450 2003-2005 / WR250 1994-1997 / WRF250 2001-2014 / WRF400 1998-2000 / WRF426 2001-2002 / WRF450 2003-2018
£43.83
Stops a small leak becoming a shock that needs a full rebuild.
SPROCKET BOLT SET YAMAHA (REAR) 6 PIECES 8X25 BY PROX
£11.70
Small bolts holding together a lot of power.
STEERING BEARING KIT SUZUKI RM125 RM250 1991-1992 / YAMAHA YZ YZF 125 250 426 450
£41.77
Smooth, confident steering starts at the head bearings.
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