Wiseco Hi Performance Pistons

Wiseco race pistons are a quality product. The pistons are forged, which makes them more durable and are less prone to wear hence longer race time.

Pistons Kits generally include :Piston, Piston rings,Gudgeon pin and circlips. Wiseco ring sets are also available separately as are gasket sets and piston sleeves.

If your bike isn't listed please contact us we supply all Wiseco products

Supported manufacturers

Honda 4 strokes

Model	Years	Displacement	Piston Size	Bore Size	Notes	Price
XR250R	1986 to 03	249	STD	73	Cylinder boring only required	Ł115
XR250R	1986 to 03	252	0.5	73.5	Cylinder boring only required	Ł115
XR250R	1986 to 03	256	1.00	74	Cylinder boring only required	Ł115
XR250R	1986 to 03	266	2.5	75.5	Cylinder boring only required	Ł115
XR250R	1986 to 03	277	4.00	77	Cylinder boring only required	Ł115
XR250R	1986 to 03	284	5.00	78	Cylinder boring only required	Ł115

XR400R	1996 to 03	397	STD	85	10:1 compression ratio	Ł135
XR400R	1996 to 03	416	2.00	87	10:1 compression ratio	Ł135
XR400R	1996 to 03	397	STD	85	11:1 compression ratio	Ł135
XR400R	1996 to 03	407	1.00	86	11:1 compression ratio	Ł135
XR400R	1996 to 03	416	2.00	87	11:1 compression ratio	Ł135
XR400R	1996 to 03	426	3.00	88	11:1 compression ratio	Ł135
XR400R	1996 to 03	440	4.00	89	Sleeve required 11:1	Ł145
XR400R	1996 to 03	440	4.00	89	Sleeve required 12.5:1	Ł155

CRF450R	2002 to 03	450	STD	96	11.5:1 Compression ratio	Ł129.95
CRF450R	2002 to 03	450	STD	96	12.5:1 Compression ratio	Ł129.95
CRF450R	2002 to 03	476	3.00	99	12.5:1 Compression ratio	Ł129.95
CRF450R	2002 to 03	496	5.00	101	New Cylinder big bore kit	POA

XR600R	1985 to 2000	591	STD	97	9:1 Compression ratio , 88 to 90 models have Nikasil bore and require sleeve or replating	Ł135
XR600R	1985 to 2000	597	0.5	97.5	9:1 Compression ratio	Ł135
XR600R	1985 to 2000	603	1.00	98	9:1 Compression ratio	Ł135
XR600R	1985 to 2000	628	3.00	100	9:1 Compression ratio	Ł135
XR600R	1985 to 2000	591	STD	97	11:1 Compression ratio	Ł135
XR600R	1985 to 2000	597	0.5	97.5	11:1 Compression ratio	Ł135
XR600R	1985 to 2000	603	1.00	98	11:1 Compression ratio	Ł135
XR600R	1985 to 2000	628	3.00	100	11:1 Compression ratio	Ł135

XR650L	1996 to 2000	644	STD	100	10.25:1 Compression ratio	Ł135
XR650L	1996 to 2000	657	1.00	101	10.25:1 Compression ratio	Ł135
XR650L	1996 to 2000	675	2.4	102.4	10.25:1 Compression ratio	Ł135

XR650R	2000 to 2003	649	STD	100	10:1 Compression ratio	Ł135
XR650R	2000 to 2003	680	2.4	102.4	10:1 Compression ratio	Ł135
XR650R	2000 to 2003	649	STD	100	11:1 Compression ratio	Ł135
XR650R	2000 to 2003	680	2.4	102.4	11:1 Compression ratio	Ł135

Kawasaki 4 strokes

Model	Years	Displacement	Piston Size	Bore Size	Notes	Price
KLX300	1997 to 2003	292	STD	78	11:1 Compression ratio	Ł115
KLX300	1997 to 2003	308	2.00	80	11:1 Compression ratio	Ł115

KLX400	2003	398	STD	90	12.2:1 Compression ratio	Ł130
KLX400	2003	416	2.00	92	12.2:1 Compression ratio	Ł130
KLX400	2003	398	STD	90	13.5:1 Compression ratio	Ł135
KLX400	2003	416	2.00	92	13.5:1 Compression ratio	Ł135

KLX400	2000 to 2003	440	4.5	94.5	12.5:1 Compression ratio	Ł145
KLX400	2000 to 2003	440	4.5	94.5	13.5:1 Compression ratio	Ł155

KTM 4 strokes

Model	Years	Displacement	Piston Size	Bore Size	Notes	Price
400SX	2000 to 2002	398	STD	89	11:1 Compression ratio	Ł135
400EXC	2000 to 2002	416	2.0	91	11:1 Compression ratio	Ł135
400SX	2000 to 2002	398	STD	89	12.5:1 Compression ratio	Ł135
400EXC	2000 to 2002	416	2.0	91	12.5:1 Compression ratio	Ł135

520SX/EXC	2000 to 2002	510	STD	95	11:1 Compression ratio	Ł135
525SX/EXC	2000 to 2002	532	2.0	97	11:1 Compression ratio	Ł135
520SX/EXC	2000 to 2002	398	STD	89	12.5:1 Compression ratio	Ł135
525SX/EXC	2000 to 2002	416	2.0	91	12.5:1 Compression ratio	Ł135

Suzuki 4 strokes

Model	Years	Displacement	Piston Size	Bore Size	Notes	Price
DRZ400	2000 to 2003	398	STD	90	12.2:1 Compression ratio	Ł135
DRZ400	2000 to 2003	416	2.0	92	12.2:1 Compression ratio	Ł135
DRZ400	2000 to 2003	398	STD	89	13.5:1 Compression ratio	Ł135
DRZ400	2000 to 2003	416	2.0	91	13.5:1 Compression ratio	Ł135
DRZ400	2000 to 2003	440	4.5	94.5	12.5:1 Compression ratio	Ł135
DRZ400	2000 to 2003	440	4.5	94.5	13.5:1 Compression ratio	Ł135

Yamaha 4 strokes

Model	Years	Displacement	Piston Size	Bore Size	Notes	Price
TTR250	1999 to 2003	249	STD	73	10.5:1 Compression ratio	Ł135
TTR250	1999 to 2003	253	0.5	73.5	10.5:1 Compression ratio	Ł135
TTR250	1999 to 2003	256	1.0	74	10.5:1 Compression ratio	Ł135
TTR250	1999 to 2003	260	1.5	74.5	10.5:1 Compression ratio	Ł135
TTR250	1999 to 2003	263	2.00	75	10.5:1 Compression ratio	Ł135

YZ250F	2001 to 2003	249	STD	77	Standard Compression ratio	Ł135
YZ250F	2001 to 2003	263	STD	77	+0.75 Compression ratio over standard	Ł135
YZ250F	2001 to 2003	262	2.0	79	+1.2 Compression ratio over standard	Ł135

YZ400F/WR400F	1996 to 2000	400	STD	92	12.5:1 Compression ratio	Ł135
YZ400F/WR400F	1996 to 2000	417	2.0	94	12.5:1 Compression ratio	Ł135
YZ400F/WR400F	1996 to 2000	400	STD	92	13.5:1 Compression ratio	Ł135
YZ400F/WR400F	1996 to 2000	417	2.0	94	13.5:1 Compression ratio	Ł135

YZ426F/WR426F	2000 to 2003	426	STD	95	12.5:1 Compression ratio	Ł135
YZ426F/WR426F	2000 to 2003	440	1.5	96.5	12.5:1 Compression ratio	Ł135
YZ426F/WR426F	2000 to 2003	444	2.00	97	13.5:1 Compression ratio	Ł135
YZ426F/WR426F	2000 to 2003	426	STD	95	13.5:1 Compression ratio	Ł135
YZ426F/WR426F	2000 to 2003	440	2.0	97	13.5:1 Compression ratio	Ł135

YZ450F	2001 to 2003	449	STD	95	12.5:1 Compression ratio	Ł139.50
YZ450F	2001 to 2003	469	2.0	97	12.5:1 Compression ratio	Ł139.50
YZ450F	2001 to 2003	449	STD	95	13.5:1 Compression ratio	Ł139.50
YZ450F	2001 to 2003	469	2.0	97	13.5:1 Compression ratio	Ł139.50