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

Model	Displ. (cc)	Bore size mm	Over Size inches	Wiseco Kit Part #
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	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	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	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	Add one to basket.
CR80, 1986-2002 International bore only US models use 47mm	79.4	46	STD	668MO4600	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	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	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	Add one to basket.
CR85, 2003-2004 GP style Electra coated	85	47.5	STD	838M04750	Add one to basket.
CR80 93-03 CR85 2003-04 CR101 Big Bore Cylinder work and head modification required	101.5	52		766M05200	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	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	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	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	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	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	Add one to basket.
CR125, 1990-91 PRO-LITE Nikasil Bore	124	54 54.5 55	STD .020 .040	595MO5400 595MO5450 595MO5500	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	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	Add one to basket.
CR125 2004 PRO-LITE Nikasil Bore	125 134	54 56	STD .080	840M05400 840M05600	Add one to basket.
CR125 2004 PRO-LITE GP style Electra coated	125 134	54 56 57	STD .080 .120	841M05400 841M05600 841M05700	Add one to basket.a
CR125 2005-06 PRO-LITE Nikasil Bore	125	54	STD	859M05400	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	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	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	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	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	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	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	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	Add one to basket.
CR250 2002-04 Electra coated single ring	249	66.4	STD	802MO6640	Add one to basket.
CR250 2005-06 Electra coated single ring	249	66.4	STD	860MO6640	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	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	Add one to basket.

Wiseco Pistons: Honda 4 Stroke Dirt bike