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Wiseco Pistons are 20% off and we will ship your Wiseco piston kit
free to anywhere in the continental USA.
Big Bore kits, Wiseco Harley Davidson and all Wiseco street bike pistons also available.
Click here to buy Wiseco pistons now in our Online Store

Wiseco Pistons Applications

Cobra,LEM,Action, KTM 50cc-65cc
Honda Wiseco
Husqvarna Wiseco
Kawasaki Wiseco
KTM Wiseco
Suzuki Wiseco
Yamaha Wiseco

Wiseco Pistons: Honda 2 Stroke Dirt bike
arrow down for 4 Stroke wiseco Pistons

Model	Displ. (cc)	Bore size mm	Over Size inches	Wiseco Kit Part #	List Price	Our Price
CR80R 1980-82 TC80, 1970-78	79.7	49.5 50 50.25 50.5 51 51.5	STD .020 .030 .040 .060 .080	450MO4950 450MO5000 450MO5025 450MO5050 450MO5100 450MO5150	$75.35 $75.35 $75.35 $75.35 $82.87 $82.87	$60.00 $60.00 $60.00 $60.00 $66.00 $66.00	Add one to basket.
CR80R 1983	79.7	49.5 50 50.5 51 51.5	STD .020 .040 .060 .080	493MO4950 493MO5000 493MO5050 493MO5100 493MO5150	$75.35 $75.35 $75.35 $82.87 $82.87	$60.00 $60.00 $60.00 $66.00 $66.00	Add one to basket.
CR80R 1984, ATAC Lead 80	79.7	49.5 50 50.5 51 51.5	STD .020 .040 .060 .080	509MO4950 509MO5000 509MO5050 509MO5100 509MO5150	$75.35 $75.35 $75.35 $82.87 $82.87	$60.00 $60.00 $60.00 $66.00 $66.00	Add one to basket.
CR80R 1985	82.9	47 47.5 47.75 48 48.25 48.5 49	STD .020 .030 .040 .050 .060 .080	517MO4700 517MO4750 517MO4775 517MO4800 517MO4825 517MO4850 517MO4900	$75.35 $75.35 $75.35 $75.35 $75.35 $82.87 $82.87	$60.00 $60.00 $60.00 $60.00 $60.00 $66.00 $66.00	Add one to basket.
CR80, 1986-2002 International bore only US models use 47mm	79.4	46	STD	668MO4600	$79.29	$63.50	Add one to basket.
CR80, 1986-2002 PRO-LITE,Nikasil bore. Cylinder sleeving required for oversizes	82.9 85	47 47.25 47.5 47.75 48 49	STD .010 .020 .030 .040 .080	643MO4700 643MO4725 643MO4750 643MO4775 643MO4800 643MO4900	$74.26 $74.26 $74.26 $74.26 $81.68 $81.68	$59.50 $59.50 $59.50 $59.50 $65.00 $65.00	Add one to basket. 47.25mm and 47.75mm were discontinued in 2006
CR80, 1986-2002 GP style Electra coated	82.9 90.1	47 49	STD .080	798MO4700 798MO4900	$77.97 $85.77	$62.00 $68.50	Add one to basket.
CR85, 2003-2004 PRO-LITE,Nikasil bore. Cylinder sleeving required for oversizes	85 92 96	47.5 48 48.5 49.5 50.5	STD 0.50mm 1.00mm 2mm 3mm	833M04750 833M04800 833M04850 833M04950 833M05050	$70.89 $70.89 $77.96 $77.96 $89.66	$57.00 $62.00 $72.00	Add one to basket.
CR85, 2003-2004 GP style Electra coated	85	47.5	STD	838M04750	$81.87	$65.50	Add one to basket.
CR80 93-03 CR85 2003-04 CR101 Big Bore Cylinder work and head modification required	*101.5*	52		766M05200	$109.78	$88.00	Add one to basket.
125MT, CR125 1973-78	123	56 56.5 57 57.5 58	STD .020 .040 .060 .080	339MO5600 339MO5650 339MO5700 339MO5750 339MO5800	$119.61 $119.61 $119.61 $131.58 $131.58	$96.00 $96.00 $96.00 $105.00 $105.00	Add one to basket.
CR125, 1979 Chrome bore. Cylinder sleeving required for oversizes	123	56 56.25 56.5 56.75 57 57.5	STD .010 .020 .030 .040 .060	430MO5600 448MO5625 448MO5650 448MO5675 448MO5700 448MO5750	$119.61 $119.61 $119.61 $119.61 $131.58 $131.58	$96.00 $96.00 $96.00 $96.00 $105.00 $105.00	Add one to basket.
CR125, ATAC 1980-84	120	55.5 55.75 56 56.25 56.5 56.75 57 57.5	STD .010 .020 .030 .040 .050 .060 .080	448MO5550 448MO5575 448MO5600 448MO5625 448MO5650 448MO5675 448MO5700 448MO5750	$119.61 $119.61 $119.61 $119.61 $119.61 $131.58 $131.58 $131.58	$96.00 $96.00 $96.00 $96.00 $96.00 $105.00 $105.00 $105.00	Add one to basket.
CR125, 1985-86 Pro - Lite	124	54 54.25 54.5 54.75 55 55.25 55.5 56	STD .010 .020 .030 .040 .050 .060 .080	518MO5400 518MO5425 518MO5450 518MO5475 518MO5500 518MO5525 518MO5550 518MO5600	$95.67 $95.67 $95.67 $95.67 $95.67 $105.24 $105.24 $105.24	$76.50 $76.50 $76.50 $76.50 $76.50 $84.00 $84.00 $84.00	Add one to basket.
CR125, 1987 PRO.LITE	124	54 54.25 54.5 54.75 55 55.25 55.5 56	STD .010 .020 .030 .040 .050 .060 .080	553MO5400 553MO5425 553MO5450 553MO5475 553MO5500 553MO5525 553MO5550 553MO5600	$100.16 $100.16 $100.16 $100.16 $100.16 $110.18 $110.18 $110.18	$80.00 $80.00 $80.00 $80.00 $80.00 $88.00 $88.00 $88.00	Add one to basket.
CR125RJ 1988-89 PRO-LITE 1989 has a Nikasil Bore and cylinder sleeving is required for oversizes	124	54 54.25 54.5 54.75 55 55.25 55.5 56	STD .010 .020 .030 .040 .050 .060 .080	564MO5400 564MO5425 564MO5450 564MO5475 564MO5500 564MO5525 564MO5550 564MO5600	$100.16 $100.16 $100.16 $100.16 $100.16 $110.18 $110.18 $110.18	$80.00 $80.00 $80.00 $80.00 $80.00 $88.00 $88.00 $88.00	Add one to basket.
CR125, 1990-91 PRO-LITE Nikasil Bore	124	54 54.5 55	STD .020 .040	595MO5400 595MO5450 595MO5500	$100.16 $100.16 $100.16	$88.00 $88.00 $88.00	Add one to basket.
CR125, 1992-2003 PRO-LITE Nikasil Bore	124	54 54.5 55 56	STD .020 .040 .080	676MO5400 676MO5450 676MO5500 676MO5600	$99.21 $99.21 $99.21 $103.94	$79.00 $79.00 $79.00 $83.00	Add one to basket.
CR125 1995-2003 no intake window, pinned on centerline, longer skirt GP style Electra coated	124 134	54 56	STD .080"	762MO5400 762M05600	$114.00 $125.40	$91.00 $100.00	Add one to basket.
CR125 2004 PRO-LITE Nikasil Bore	125 134	54 56	STD .080	840M05400 840M05600	$92.82 $102.10	$74.00 $82.00	Add one to basket.
CR125 2004 PRO-LITE GP style Electra coated	125 134	54 56 57	STD .080 .120	841M05400 841M05600 841M05700	$110.68 $121.75 $121.75	$88.50 $97.50 $97.50	Add one to basket.a
CR125 2005-06 PRO-LITE Nikasil Bore	125	54	STD	859M05400	$92.82	$74.00	Add one to basket.
250 MT, CR, MR 1973-74 (Piston pin not included)	248	70 70.5 71 71.5 72	STD .020 .040 .060 .080	337MO7000 337MO7050 337MO7100 337MO7150 337MO7200	$128.69 $128.69 $128.69 $141.56 $141.56	$103.00 $103.00 $103.00 $113.00 $113.00	Add one to basket.
250 MT, CR, MR 1975-77	248	70 70.5 71 71.5 72	STD .020 .040 .060 .080	338MO7000 338MO7050 338MO7100 338MO7150 338MO7200	$128.69 $128.69 $128.69 $141.56 $141.56	$103.00 $103.00 $103.00 $113.00 $113.00	Add one to basket.
CR250R 1978-80 Chrome bore. Cylinder sleeving required for oversizes	248	70 70.25 70.5 70.75 71 71.25 71.5 72	STD .010 .020 .030 .040 .050 .060 .080	431MO7000 431MO7025 431MO7050 431MO7075 431MO7100 431MO7125 431MO7150 431MO7200	$130.25 $130.25 $130.25 $130.25 $130.25 $143.29 $143.29 $143.29	$104.00 $104.00 $104.00 $104.00 $104.00 $115.00 $115.00 $115.00	Add one to basket.
CR250R 1981-83	246	66 66.25 66.5 66.75 67 67.5 68	STD .010 .020 .030 .040 .060 .080	466MO6600 466MO6625 466MO6650 466MO6675 466MO6700 466MO6750 466MO6800	$124.33 $124.33 $124.33 $124.33 $124.33 $136.77 $136.77	$99.00 $99.00 $99.00 $99.00 $99.00 $109.00 $109.00	Add one to basket.
CR250, ATAC 1984-85 PRO-LITE	246 261	66 66.25 66.5 66.75 67 67.25 67.5 68	STD .010 .020 .030 .040 .050 .060 .080	526MO6600 526MO6625 526MO6650 526MO6675 526MO6700 526MO6725 526MO6750 526MO6800	$130.63 $130.63 $130.63 $130.63 $130.63 $143.68 $143.68 $143.68	$104.00 $104.00 $104.00 $104.00 $104.00 $115.00 $115.00 $115.00	Add one to basket.
CR250 1986-96 PRO-LITE Nikasil Bore and cylinder sleeving is required	249	66.4 67 67.5 68 68.5	STD .024 .044 .065 .085	614MO6640 614MO6700 614MO6750 614MO6800 614MO6850	$130.73 $130.73 $130.73 $143.80 $143.80	$104.00 $104.00 $104.00 $115.00 $115.00	Add one to basket.
CR250 1997-2001 PRO-LITE	249	66.4 67 67.5 68 68.5	STD .024 .044 .065 .085	702MO6640 702MO6700 702MO6750 702MO6800 702MO6850	$126.91 $126.91 $126.91 $139.61 $139.61	$102.00 $102.00 $102.00 $112.00 $112.00	Add one to basket.
CR250 2002-04 PRO-LITE	249	66.4 67 67.5 68.5	STD .024 .044 .085	801MO6640 801MO6700 801MO6750 801MO6850	$126.91 $126.91 $139.61 $139.61	$102.00 $102.00 $112.00 $112.00	Add one to basket.
CR250 2002-04 Electra coated single ring	249	66.4	STD	802MO6640	$146.06	$117.00	Add one to basket.
CR250 2005-06 Electra coated single ring	249	66.4	STD	860MO6640	$146.06	$117.00	Add one to basket.
CR500, 1984-1989 CR480R 1982-83 PRO-LITE	491	89 89.5 90 90.5 91	STD .020 .040 .060 .080	554MO8900 554MO8950 554MO9000 554MO9050 554MO9100	$157.06 $157.06 $157.06 $172.77 $172.77	$126.00 $126.00 $126.00 $138.00 $138.00	Add one to basket.
CR500, 1990-2001 PRO-LITE	491	89 89.5 90 90.5 91	STD .020 .040 .060 .080	636MO8900 636MO8950 636MO9000 636MO9050 636MO9100	$157.06 $157.06 $157.06 $172.77 $172.77	$126.00 $126.00 $126.00 $138.00 $138.00	Add one to basket.

Wiseco Pistons: Honda 4 Stroke Dirt bike

Model	Bore x Stroke (mm)	Displ. (cc)	Bore size mm	Wiseco Kit Part #	List Price	Our Price
Z50R 1982-1987 11:1 Compression	39 x 41.4	49.5	39 39.5 40 40.5 41	4828MO3900 4828MO3950 4828MO4000 4828MO4050 4828MO4100	$68.67 $68.67 $68.67 $75.54 $75.54	$55.00 $55.00 $55.00 $60.50 $60.50	Add one to basket.
XR50 1988-2003 CRF50 2004-2006 11:1 Compression	39 x 41.4	49.5	39 39.5 40 40.5 41	4798MO3900 4798MO3950 4798MO4000 4798MO4050 4798MO4100	$68.67 $68.67 $68.67 $75.54 $75.54	$55.00 $55.00 $55.00 $60.50 $60.50	Add one to basket.
XR50 1988-2003 CRF50 2004-2006 10.5:1 Compression Will not fit OEM cylinder	39 x 41.4	81 88	50 52	4885M05000 4885M05200	$90.65 $90.65	$72.50 $72.50	Add one to basket.
XR50 1988-2003 CRF50 2004-2006 13:1 Compression Will not fit OEM cylinder	39 x 41.4	81 88	50 52	4886M05000 4886M05200	$99.71 $99.71	$80.00 $80.00	Add one to basket.
XR70 1997-2003 CRF70 2004-2006 10.5:1 Compression	47 x 41.4	72 73 75 76 78	47 47.5 48 48.5 49	4880M4700 4880M4750 4880M4800 4880M4850 4880M4900	$83.09 $83.09 $83.09 $91.39 $91.39	$66.50 $66.50 $66.50 $73.00 $73.00	Add one to basket.
XR80, 1979-2003 CRF80 2004-2006 9.7:1 Compression	47.5 x 45	79.7	48 48.5 49 49.5	4665MO4800 4665MO4850 4665MO4900 4665MO4950	$92.82 $92.82 $102.10 $102.10	$74.00 $74.00 $82.00 $82.00	Add one to basket.
XR100, 1985-2003 9.4:1 Compression	53 x 45	99.2	53.5 54 54.5 55	4666MO5350 4666MO5400 4666MO5450 4666MO5500	$92.82 $92.82 $102.10 $102.10	$74.00 $74.00 $82.00 $82.00	Add one to basket.
XR100, (120cc) 58mm Big Bore 1985-2003 12:1 Compression Big bore sleeve required	58 x 45	120	58	4773M05800	$107.21	$86.00	Add one to basket.
XR200 up to 1983, XR185 (+ .100) 1986-2003 10:1 Compression	65.5 x 57.8	192	65.5 66 66.5 67	4156MO6550 4156MO6600 4156MO6650 4156M06700	$111.69 $111.69 $122.85 $122.85	$89.00 $89.00 $98.00 $98.00	Add one to basket.
CRF230F 2003-2006 11-1 Compression	65.5 x 66.2	223	65.5	4816M06550	$168.00	134.00	Add one to basket.
XL250, 1979-82 XR250, thru 1983 10:1 Compression	74 x 57.8	248	74 74.5 75 75.5 76	4171MO7400 4171MO7450 4171MO7500 4171MO7550 4171MO7600	$130.25 $130.25 $130.25 $143.29 $143.29	$104.00 $104.00 $104.00 $115.00 $115.00	Add one to basket.
XL250 1984-85 XR250 1984-87 Radial head 10.5:1 Compression	75 x 56.5	250	75 75.5 76	4329MO7500 4329MO7550 4329MO7600	$133.85 $133.85 $133.85	$107.00 $107.00 $107.00	Add one to basket.
XR250R, 1986-2004 XRL250, 1991-96 10.5:1 Compression	73 x 59.5	250 284	73 73.5 74 75.5 77 78	4466MO7300 4466MO7350 4466MO7400 4466MO7550 4466MO7700 4466MO7800	$136.45 $136.45 $136.45 $150.12 $150.12 $150.12	$109.00 $109.00 $109.00 $120.00 $120.00 $120.00	Add one to basket.
CRF250R, CFR250X 2004-2006 12.9:1 Stock Compression Coated skirt	78 x 52.5	249	78	4829M07800	$149.63	$120.00	Add one to basket.
CRF250R, CFR250X 2004-2006 13.5:1 High Ciompression Coated skirt	78 x 52.5	249	78	4852M07800	$187.25	$150.00	Add one to basket.
XR350, 1983-84 Radial head 10:1 Compression	84 x 61.3	339	84 84.5 85	4286MO8400 4286MO8450 4286MO8500	$127.76 $127.76 $127.76	$102.00 $102.00 $102.00	Add one to basket.
XR400, 1996-2004 10:1 Compression	85 x 70	397 407 416 426	85 86 87 88	4606MO8500 4606MO8600 4606MO8700 4606MO8800	$131.60 $131.60 $144.76 $144.76	$105.00 $105.00 $116.00 $116.00	Add one to basket.
XR400, 1996-2004 11:1 Compression	85 x 70	397 407 416 426	85 86 87 88	4628MO8500 4628MO8600 4628MO8700 4628MO8800	$146.16 $146.16 $160.78 $160.78	$117.00 $117.00 $112.00 $129.00	Add one to basket.
XR400, 1996-2004 440 big bore 11:1 Compression	85 x 70	435	89	4667M08900	$151.84	$121.50	Add one to basket.
XR400, 1996-2004 440 big bore 12.5:1 Compression	85 x 70	435	89	4794M08900	$150.55	$120.00	Add one to basket.
CRF450R 02-06 11.5:1 standard compression for 2002 and 2003 Coated skirt	*96 62.1**	450	96	4753M09600	$150.76	$120.00	Add one to basket.
CRF450R 02-06 12:1 standard compression for 2004 Coated skirt	*96 62.1**	450	96	4820M09600	$163.28	$130.00	Add one to basket.
CRF450R 02-06 12.5:1 compression cylinder work required for98 and 99mm Coated skirt	*96 62.1**	450 468 478	96 98 99	4755M09600 4755M09800 4755M09900	175.88 193.46 193.46	$141.00 $155.00 $155.00	Add one to basket.
CRF450R 02-06 13:1 Hi-compression	*96 62.1**	450	96	4822M09600	$193.46	$155.00	Add one to basket.
CRF450R 02-06 13.5:1 Hi-compression Coated skirt	*96 62.1**	450	96	4823M09600	$213.10	$170.00	Add one to basket.
CRF450R 02-06 500cc Big Bore 12.5:1 compression cylinder work required Coated skirt	*101 62.1**	498	101	4780M10100	$195.98	$157.00	Add one to basket.
CRF450R 02-06 500cc Big Bore Heavy duty 12.5:1 compression cylinder work required Coated skirt	*101 62.1**	498	101	4890M10100	$202.90	$162.00	Add one to basket.
XR, XL500, 1979-82 FT500, 1982-84 10:1 Compression	89 x 80	497 503 509 520 567	89 89.5 90 90.93 95	4117MO8900 4117MO8950 4117MO9000 4117MO9093 4117MO9500	$159.75 $159.75 $159.75 $175.72 $175.72	$128.00 $128.00 $128.00 $141.00 $141.00	Add one to basket.
XR, XL500, 1979-82 FT500, 1982-84 12:1 Compression	89 x 80	497 509	89 89.5 90	4163MO8900 4163MO8950 4163MO9000	$169.26 $169.26 $169.26	$135.00	Add one to basket.
XR500, Radial head 1983-84 10.25:1 Compression	92 x 75	498	92 92.5 93	4330MO9200 4330MO9250 4330MO9300	$169.26 $169.26 $169.26	$135.000	Add one to basket.
XL600, 1983-87 Radial head 11:1 Compression	100 x 75	589 440	100 101 102.4	4332M10000 4332M10100 4332M10240	$155.28 $155.28 $155.28	$124.00 $124.00 $124.00	Add one to basket.
XR600, XR600R 1985-2003, 11:1 Compression	97 x 80	591 628	97 97.5 98 100	4366MO9700 4366MO9750 4366MO9800 4366MO10000	$165.21 $165.21 $165.21 $181.73	$132.00 $132.00 $132.00 $145.00	Add one to basket.
XR600, XR600R 1985-2003, 9:1 Compression	97 x 80	591 628	97 97.5 98 100	4577MO9700 4577MO9750 4577MO9800 4577M010000	$160.40 $160.40 $160.40 $176.44	$128.00 $128.00 $128.00 $141.00	Add one to basket.
NX, XR650C, 1993-99 XR650L, 1996-98 Dominator 10.25:1 Compression	100 x 82	650 675	100 101 102.4	4562M10000 4562M10100 4562M10241	$160.40 $160.40 $176.44	$128.00 $128.00 $141.00	Add one to basket.
XR650R 2000-03 10.1 stock compression	100 x 82.6	649 680	100 102.4	4715M10000 4715M10240	$160.40 $176.44	$128.00 $141.00	Add one to basket.
XR650R 2000-03 11.1 compression	100 x 82.6	649 680	100 102.4	4716M10000 4716M10240	$172.72 $189.99	$138.00 $151.00	Add one to basket.