Wiseco Yamaha Pistons

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Model	Bore x Stroke (mm)	Displ. (cc)	Bore size mm	Bore Size inches	Wiseco Kit Part #	Bore size mm	Bore Size inches	Wiseco Kit Part #	Repl. Ring Set part #	gasket Kit	Top-end bearing
YSR50 DT50, TY50	40 x 39	49	40 40.5 41 41.5 42	STD .020 .040 .060 .080	727M04000 727M04050 727M04100 727M04150 727M04200	40 40.5 41 41.5 42	STD .020 .040 .060 .080	727M04000 727M04050 727M04100 727M04150 727M04200	1574CD 1594CD 1614CD 1634CD 1654CDClick to add one to basket	W5704 or C7506	B1042
YSR50, DT50, TY50, Big Bore Kit 3 mm overbore	40 x 39	57	43 43.5 44	STD .020 .040	598M04300 598M04350 598M04400	43 43.5 44	STD .020 .040	598M04300 598M04350 598M04400	1693CD 1713CD 1732CD	W5228 or C7075	B1042
PW50, until 2004	40 x 39.2	49	40 40.5 41 41.5 42	STD .020 .040 .060 .080	653M04000 653M04050 653MO4100 653MO4150 653MO4200	40 40.5 41 41.5 42	STD .020 .040 .060 .080	653M04000 653M04050 653MO4100 653MO4150 653MO4200	1574CD 1594CD 1614CD 1634CD 1654CD	untill 1991: W5466 or C7266 1992-02: W5531or C7267	NA
YZ80, 1974-75 MX80, 1980-82 TY80, 1974-75 GT1, 1973-75	47 x 42	72	47 47.5 48 48.5 49	STD .020 .040 .060 .080	222MO4700 222MO4750 222MO4800 222MO4850 222MO4900	47 47.5 48 48.5 49	STD .020 .040 .060 .080	222PS 222P2 222P4 222P6 222P8	1850CS 1869CS 1890CS 1909CS 1929CS	N.A.	B1042
PW80, BW80, FZR80 Thru 2003	47 x 42	72	47 47.5 48 48.5 49	STD .020 .040 .060 .080	649MO4700 649MO4750 649MO4800 649MO4850 649MO4900	47 47.5 48 48.5 49	STD .020 .040 .060 .080	649PS 649P2 649P4 649P6 649P8	1850CD 1869CD 1890CD 1909CD 1929CD	W5560 or C7251	B1042
YZ80, 1976-80 DT80, LC, II RD80, all Types	49 x 42	79	49 49.25 49.5 49.75 50 50.5 51	STD .010 .020 .030 .040 .060 .080	457MO4900 457MO4925 457MO4950 457MO4975 457MO5000 457MO5050 457MO5100	49 49.25 49.5 49.75 50 50.5 51	STD .010 .020 .030 .040 .060 .080	457PS 457P1 457P2 457P3 457P4 457P6 457P8	1929CD 1939CD 1949CD 1959CD 1969CD 1988CD 2008CD	N.A.	B1042
YZ80H, 1981	49 x 42	79	49 49.5 50 50.5 51	STD .020 .040 .060 .080	465MO4900 465MO4850 465MO5000 465MO5050 465MO5100	49 49.5 50 50.5 51	STD .020 .040 .060 .080	465PS 465P2 465P4 465P6 465P8	1929CD 1949CD 1969CD 1988CD 2008CD	N.A.	B1043
YZ80J, K, 1982-83	47 x 45.6	79	47 47.25 47.5 47.75 48 48.5 49	STD .010 .020 .030 .040 .060 .080	477MO4700 477MO4725 477MO4750 477MO4775 477MO4800 477MO4850 477MO4900	47 47.25 47.5 47.75 48 48.5 49	STD .010 .020 .030 .040 .060 .080	477PS 477P1 477P2 477P3 477P4 477P6 477P8	1850CD 1860CD 1869CD 1879CD 1890CD 1909CD 1929CD	1983: W4050	B1043
YZ80, 1984	48 x 45.6	82	48 48.5 49 49.5 50	STD .020 .040 .060 .080	508MO4800 508MO4850 508MO4900 508MO4950 508MO5000	48 48.5 49 49.5 50	STD .020 .040 .060 .080	508PS 508P2 508P4 508P6 508P8	1890CS 1909CS 1929CS 1949CS 1969CS	W4051	B1015
YZ80, 1985-87	48 x 45.6	82	48 48.5 49 49.5 50	STD .020 .040 .060 .080	520MO4800 520MO4850 520MO4900 520MO4950 520MO5000	48 48.5 49 49.5 50	STD .020 .040 .060 .080	520PS 520P2 520P4 520P6 520P8	1890CS 1909CS 1929CS 1949CS 1969CS	1985: W4052 1986: W5281 1987: W5282	B1015
YZ80, 1988-92	48 x 45.6	82	48 48.5 49 49.5 50	STD .020 .040 .060 .080	569MO4800 569MO4850 569MO4900 569MO4950 569MO5000	48 48.5 49 49.5 50	STD .020 .040 .060 .080	569PS 569P2 569P4 569P6 569P8	1890CS 1909CS 1929CS 1949CS 1969CS	'88-90: W5283 '91-92: W5284 43.-	B1015
YZ80, 1993-2001 PRO-LITE Ceramic Composite	47 x 47.8	79 85	46 47 47.5 48 48.5 49	STD STD .020 .040 .060 .080	671MO4600 646MO4700 646MO4750 646MO4800 646MO4850 646MO4900	46 47 47.5 48 48.5 49	STD STD .020 .040 .060 .080	671PS 646PS 646P2 646P4 646P6 646P8	1830CD 1850CS 1869CS 1890CS 1909CS 1929CS	W5353	B1012
YZ85 2002-2004 PRO-LITE Ceramic Composite	47.5 x 47.8	85 92	47.5 49.5	STD .080	805M04750 805M04950	47.5 49.5	STD .080	805M04750 805M04950	1869CS 1949CS	W5983	B1012
YZ80, yz85 big bore 103.5cc 1993-2004 PRO-LITE Case modification necessary Ceramic Composite	52.5 x 47.8	103.5cc	52.5	STD	767M05250	52.5	STD	767M05250	2067cs	93-01 W5353 02-03 w5983	B1012
100LT-2, 3, MX100, DT100 52 RD200	52 x 45.6	98	52 52.5 53 53.5 54	STD .020 .040 .060 .080	235MO5200 235MO5250 235MO5300 235MO5350 235MO5400	52 52.5 53 53.5 54	STD .020 .040 .060 .080	235PS 235P2 235P4 235P6 235P8	2047CD 2067CD 2087CD 2106CD 2126CD	N.A.	B1012
YZ100C, D, E, F, G, H, J 1976-83	50 x 50	98	50 50.25 50.5 50.75 51 51.5 52	STD .010 .020 .030 .040 .060 .080	455MO5000 455MO5025 455MO5050 455MO5075 455MO5100 455MO5150 455MO5200	50 50.25 50.5 50.75 51 51.5 52	STD .010 .020 .030 .040 .060 .080	455PS 455P1 455P2 455P3 455P4 455P6 455P8	1969CD 1979CD 1988CD 1998CD 2008CD 2028CD 2047CD	N.A.	B1016
RT 100 1990-2000	52 x 45.6				771M05200 771M05250 771M05300 771M05350 771M05400			771M05200 771M05250 771M05300 771M05350 771M05400			B1012
125 AT-2, 3 MX, IT, DT2 1980-86	56 x 50	123	56 56.5 57 57.5 58	STD .020 .040 .060 .080	236MO5600 236MO5650 236MO5700 236MO5750 236MO5800	56 56.5 57 57.5 58	STD .020 .040 .060 .080	236PS 236P2 236P4 236P6 236P8	2205CD 2224CD 2244CD 2264CD 2284CD	N.A.	B1016
YZ125C, D, E, F, G, H, J 1976-82	56 x 50	123	56 56.25 56.5 56.75 57 57.5 58	STD .010 .020 .030 .040 .060 .080	435MO5600 435MO5625 435MO5650 435MO5675 435MO5700 435MO5750 435MO5800	56 56.25 56.5 56.75 57 57.5 58	STD .010 .020 .030 .040 .060 .080	435PS 435P1 435P2 435P3 435P4 435P6 435P8	2205CS 2215CS 2224CS' 2234CS 2244CS 2264CS 2284CS	N.A.	B1016
YZ125K, 1983	56 x 50	123	56 56.25 56.5 56.75 57 57.5 58	STD .010 .020 .030 .040 .060 .080	503MO5600 503MO5625 503MO5650 503MO5675 503MO5700 503MO5750 503MO5800	56 56.25 56.5 56.75 57 57.5 58	STD .010 .020 .030 .040 .060 .080	503PS 503P1 503P2 503P3 503P4 503P6 503P8	2205CS 2215CS 2224CS 2234CS 2244CS 2264CS 2284CS	W4053	B1016
YZ125, 1984	56 x 50	123	56 56.25 56.5 56.75 57 57.25 57.5 58	STD .010 .020 .030 .040 .050 .060 .080	512MO5600 512MO5625 512MO5650 512MO5675 512MO5700 512MO5725 512MO5750 512MO5800	56 56.25 56.5 56.75 57 57.25 57.5 58	STD .010 .020 .030 .040 .050 .060 .080	512PS 512P1 512P2 512P3 512P4 512P5 512P6 512P8	2205CS 2215CS 2224CS 2234CS 2244CS 2254CS 2264CS 2284CS	W4053	B1016
YZ125N, 1985 Power Valve	56 x 50	123	56 56.25 56.5 56.75 57 57.25 57.5 58	STD .010 .020 .030 .040 .050 .060 .080	521MO5600 521MO5625 521MO5650 521MO5675 521MO5700 521MO5725 521MO5750 521MO5800	56 56.25 56.5 56.75 57 57.25 57.5 58	STD .010 .020 .030 .040 .050 .060 .080	521PS 521P1 521P2 521P3 521P4 521P5 521P6 521P8	2205CS 2215CS 2224CS 2234CS 2244CS 2254CS 2264CS 2284CS	YZ125 W5285	B1016
YZ125, 1986-88 PRO-LITE Power Valve	56 x 50	123	56 56.25 56.5 56.75 57 57.25 57.5 58	STD .010 .020 .030 .040 .050 .060 .080	559MO5600 559MO5625 559MO5650 559MO5675 559MO5700 559MO5725 559MO5750 559MO5800	56 56.25 56.5 56.75 57 57.25 57.5 58	STD .010 .020 .030 .040 .050 .060 .080	559PS 559P1 559P2 559P3 559P4 559P5 559P6 559P8	2205CS 2215CS 2224CS 2234CS 2244CS 2254CS 2264CS 2284CS	W4904	B1016
YZ125, 1989 PRO-LITE Nicasil cylinder	56 x 50	123	56 56.25 56.5 56.75 57	STD .010 .020 .030 .040	582MO5600 582MO5625 582MO5650 582MO5675 582MO5700	56 56.25 56.5 56.75 57	STD .010 .020 .030 .040	582PS 582P1 582P2 582P3 582P4	2205CS 2215CS 2224CS 2234CS 2244CS	W5167	B1016
YZ125, 1990-92 PRO-LITE Nicasil cylinder	56 x 50.7	123	56 56.25 56.5 56.75 57	STD .010 .020 .030 .040	594MO5600 594MO5625 594MO5650 594MO5675 594MO5700	56 56.25 56.5 56.75 57	STD .010 .020 .030 .040	594PS 594P1 594P2 594P3 594P4	2205CS 2215CS 2224CS 2234CS 2244CS	90-91 C7084 1992 C7139	B1016
YZ125, 1993 PRO-LITE Nicasil cylinder	56 x 50.7	123	56 56.5 57	STD .020 .040	629MO5600 629MO5650 629MO5700	56 56.5 57	STD .020 .040	629PS 629P2 629P4	2205CS 2224CS 2244CS	C7139	B1016
YZ125, 1994-96 PRO-LITE Nicasil cylinder	54 x 54.5	123	54 54.5 55 56	STD .020 .040 .080	647MO5400 647MO5450 647MO5500 647MO5600	54 54.5 55 56	STD .020 .040 .080	647PS 647P2 647P4 647P8	2126CS 2146CS 2165CS 2205CS	C7158	B1016
YZ125, 1997 PRO-LITE Nicasil cylinder	54 x 54.5	124	54 56	STD .080	693MO5400 693MO5600	54 56	STD .080	693PS 693P8	2126CS 2205CS	C7158	B1038
YZ125, 1998-2001 PRO-LITE Nicasil cylinder	54 x 54.5	124	54 56	STD .080	726MO5400 726MO5600	54 56	STD .080	726PS 726P8	2126CS 2205CS	C7399.	1998-2000 B1038 2001 B1001
YZ125, 2002-2004 PRO-LITE Nicasil cylinder	54 x 54.5	124	54 56	STD .080	797M05400 797M05600	54 56	STD .080	797M05400 797M05600	2126CS 2205CS	C7853	B1001
175CT-2, 3 bis 1977 175MX, 1979-81 175DT, 1979-82 YT175K, L, 1984	66 x 50	172	66 66.5 67 67.5 68	STD .020 .040 .060 .080	471MO6600 471MO6650 471MO6700 471MO6750 471MO6800	66 66.5 67 67.5 68	STD .020 .040 .060 .080	471PS 471P2 471P4 471P6 471P8	2598CD 2618CD 2638CD 2658CD 2677CD	N.A.
175 YZ, IT 1976-81	66 x 50	172	66 66.5 67 67.5 68	STD .020 .040 .060 .080	374MO6600 374MO6650 374MO6700 374MO6750 374MO6800	66 66.5 67 67.5 68	STD .020 .040 .060 .080	374PS 374P2 374P4 374P6 374P8	2598CD 2618CD 2638CD 2658CD 2677CD	N.A.
TZR, DT125, R, 250 TDR 250, TDR 240 RD 500,	56 x 50.6	124	56 56.25 56.5 56.75 57 57.25 57.5	STD .010 .020 .030 .040 .050 .060	679MO5600 679MO5625 679MO5650 679MO5675 679MO5700 679MO5725 679MO5750	56 56.25 56.5 56.75 57 57.25 57.5	STD .010 .020 .030 .040 .050 .060	679PS 679P1 679P2 679P3 679P4 679P5 679P6	2205CD 2215CD 2224CD 2234CD 2244CD 2254CD 2264CD	N.A.
TZR 125R TDR 125, 1993-97 Type 4FL, 4FU	56.4 x 50.7	174	56.5	STD	720MO5650 720MO5650 720MO5650	56.5	STD	720PS 720P2 720P4	2205CD 2224CD 2244CD	N.A.
DT, RD 125 RD 500, PRO-LITE	56 x 50.6	124	56 56.25 56.5 56.75 57 57.25 57.5	STD .010 .020 .030 .040 .050 .060	684MO5600 684MO5625 684MO5650 684MO5675 684MO5700 684MO5725 684MO5750	56 56.25 56.5 56.75 57 57.25 57.5	STD .010 .020 .030 .040 .050 .060	684PS 684P1 684P2 684P3 684P4 684P5 684P6	2205CD 2215CD 2224CD 2234CD 2244CD 2254CD 2264CD	N.A.
IT200N 1984-86	66 x 57	195	66 66.5 67 67.5 68	STD .020 .040 .060 .080	522MO6600 522MO6650 522MO6700 522MO6750 522MO6800	66 66.5 67 67.5 68	STD .020 .040 .060 .080	522PS 522P2 522P4 522P6 522P8	2598CD 2618CD 2638CD 2658CD 2677CD	N.A.
DT200R, 1990-91 PRO-LITE	66 x 57	195	66 66.5 67 67.5 68	STD .020 .040 .060 .080	599MO6600 599MO6650 599MO6700 599MO6750 599MO6800	66 66.5 67 67.5 68	STD .020 .040 .060 .080	599PS 599P2 599P4 599P6 599P8	2598CD 2618CD 2638CD 2658CD 2677CD	N.A.
250 YZC, D, E, F 1976-79 250 DT2, 3, MX, Enduro IT250, 1980	70 x 64	246	70 70.5 71 71.5 72	STD .020 .040 .060 .080	234MO7000 234MO7050 234MO7100 234MO7150 234MO7200	70 70.5 71 71.5 72	STD .020 .040 .060 .080	234PS 234P2 234P4 234P6 234P8	2756CD 2776CD 2795CD 2815CD 2835CD	N.A.	B1003
250YZG, H, J 1980-82 IT250, 1981-82	70 x 64	246	70 70.25 70.5 70.75 71 71.5 72	STD .010 .020 .030 .040 .060 .080	452MO7000 452MO7025 452MO7050 452MO7075 452MO7100 452MO7150 452MO7200	70 70.25 70.5 70.75 71 71.5 72	STD .010 .020 .030 .040 .060 .080	452PS 452P1 452P2 452P3 452P4 452P6 452P8	2756CD 2766CD 2776CD 2786CD 2795CD 2815CD 2835CD	N.A.
IT250, 1983 PRO-LITE	68 x 68	246.8	68 68.25 68.5 68.75 69 69.25 69.5 70	STD .010 .020 .030 .040 .050 .060 .080	515MO6800 515MO6825 515MO6850 515MO6875 515MO6900 515MO6925 515MO6950 515MO7000	68 68.25 68.5 68.75 69 69.25 69.5 70	STD .010 .020 .030 .040 .050 .060 .080	515PS 515P1 515P2 515P3 515P4 515P5 515P6 515P8	2677CD 2687CD 2697CD 2707CD 2717CD 2727CD 2736CD 2756CD	N.A.
YZ250, 1983-87 PRO-LITE Power Valve	68 x 68	246.8	68 68.25 68.5 68.75 69 69.25 69.5 70	STD .010 .020 .030 .040 .050 .060 .080	560MO6800 560MO6825 560MO6850 560MO6875 560MO6900 560MO6925 560MO6950 560MO7000	68 68.25 68.5 68.75 69 69.25 69.5 70	STD .010 .020 .030 .040 .050 .060 .080	560PS 560P1 560P2 560P3 560P4 560P5 560P6 560P8	2677CD 2687CD 2697CD 2707CD 2717CD 2727CD 2736CD 2756CD	'86-87: C7086	B1014
YZ250, WR250, 1988-91 PRO-LITE Power Valve	68 x 68	246.8	68 68.25 68.5 68.75 69 69.25 69.5 70	STD .010 .020 .030 .040 .050 .060 .080	605MO6800 605MO6825 605MO6850 605MO6875 605MO6900 605MO6925 605Mo6850 605Mo7000	68 68.25 68.5 68.75 69 69.25 69.5 70	STD .010 .020 .030 .040 .050 .060 .080	605PS 605P1 605P2 605P3 605P4 605P5 605P6 605P8	2677CD 2687CD 2697CD 2707CD 2717CD 2727CD 2736CD 2756CD	88 C7087 '89-90: C7088 1991: C7089	B1014
YZ250, 1992-98 PRO-LITE WR250, 1992-98	68 x 68	246.8	68 68.5 69 70	STD .020 .040 .080	677MO6800 677MO6850 677MO6900 677MO7000	68 68.5 69 70	STD .020 .040 .080	677PS 677P2 677P4 677P8	2677CD 2697CD 2717CD 2756CD	1992-94: C7113 1995-96: C7250 1997-98: C7337
YZ250, 1992-98 PRO-LITE Racers choice Single ring	68 x 68	246.8	68	STD	736MO6800	68	STD	736PS	2677CS	1992-94: C7113 1995-96: C7250 1997-98: C7337
YZ250, 1999-2001 PRO-LITE	66.4 x 72	249 265	66.4 68.5	STD .080	742MO6640 742MO6850	66.4 68.5	STD .080	742PS 742P8	2614CD 2697CD	W5744 C7507	B1003
YZ250, 2002-2004 PRO-LITE	66.4 x 72	249	66.4	STD	804M06640 804M06850	66.4	STD	804M06640	2614CD	W5978 C7855	B1003
400 DT, MX 1975-78	85 x 70	397	85 85.5 86 86.5 87	STD .020 .040 .060 .080	232MO8500 232MO8550 232MO8600 232MO8650 232MO8700	85 85.5 86 86.5 87	STD .020 .040 .060 .080	232PS 232P2 232P4 232P6 232P8	3347TD 3366TD 3386TD 3405TD 3425TD	N.A.
YZ400C, D, E, IT 1976-78	85 x 70	397	85 85.5 86 86.5 87	STD .020 .040 .060 .080	394MO8500 394MO8550 394MO8600 394MO8650 394MO8700	85 85.5 86 86.5 87	STD .020 .040 .060 .080	394PS 394P2 394P4 394P6 394P8	3347TD 3366TD 3386TD 3405TD 3425TD	N.A.
YZ465 G, H, IT 1980-81	85 x 82	465	85 85.5 86 86.5 87	STD .020 .040 .060 .080	451MO8500 451MO8550 451MO8600 451MO8650 451MO8700	85 85.5 86 86.5 87	STD .020 .040 .060 .080	451PS 451P2 451P4 451P6 451P8	3347TD 3366TD 3386TD 3405TD 3425TD	N.A.
YZ490 J, K 1982-83 IT490, 1983-84	87 x 82	487	87 87.5 88 88.5 89	STD .020 .040 .060 .080	478MO8700 478MO8750 478MO8800 478MO8850 478MO8900	87 87.5 88 88.5 89	STD .020 .040 .060 .080	478PS 478P2 478P4 478P6 478P8	3425TD 3445TD 3465TD 3484TD 3504TD	1983: W4055
490N, 1984-90 WR500, 1991-93 PRO-LITE	87 x 82	487	87 87.5 88 88.5 89	STD .020 .040 .060 .080	546MO8700 546MO8750 546MO8800 546MO8850 546MO9800	87 87.5 88 88.5 89	STD .020 .040 .060 .080	546PS 546P2 546P4 546P6 546P8	3425TD 3445TD 3465TD 3484TD 3504TD	YZ490: '84-86: W4056 '87-90: W5286 WR500: '91-93: W5287

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Yamaha
(4-cycle)

Model	Bore x Stroke (mm)	Displ. (cc)	Bore size mm	Bore Size inches	Wiseco Kit Part #	gasket Kit	Circlips Wrist pin	Repl. Ring Set part #
TTR125 2000-02 11:1 Compression	54 x 54	123.7	54.00 54.5 55	STD .020 .040	4752M05400 4752M05450 4752M05500	W5962	CW15 S571	2126XE 2146XE 2165XE
TTR250 1999-02 10.5:1 Compression	53 x 45	99.2	53.5 54 54.5 55	.020 .040 .060 .080	4666P2 4666P4 4666P6 4666P8	1979-91: W5733 1992-99: W5749	CW14 S592	2106XE 2126XE 2146XE 2165XE
YZ250F 2000-04 12.5:1 Compression 79mm 13.2-1 compression	77 x 53.6	249 262	77.00 79.00	STD .080	4738M07700 4738M07900	79mm W5921 or C7796 81mm C7837 83mm C7836	W5922 S646	7700XU 3110XG

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