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982 WISECO PISTONS Model Years Compression Ratio Stock Engine Bore x Stroke Bore Size Piston Type and Coatings Cylinder and Machining Requirements Top End Kit MTV # Single Piston MTV # Ring Set MTV # Piston Pin MTV # Circlip MTV # Top End Bearing MTV # Yamaha 2-Stroke (cont.) YZ250 WR250 * Power Valve must be modified for 69mm and larger * 1991 model is Nikasil bore 88-91 1991 68.0 68.0 Pro-Lite Deglaze / Hone PK1695 316-3727 605M06800 316-1780 2677CD 316-2535 S508 316-3154 CW18 316-1905 B1014 316-7014 x 68.5 Bore/Replate/Sleeve PK1696 316-3728 605M06850 316-1782 2697CD 316-2541 68.0 69.0 Bore/Replate/Sleeve PK1697 316-3729 605M06900 316-1784 2717CD 316-2547 69.5 Bore/Replate/Sleeve 605M06950 316-1786 2736CD 316-2553 70.0 Bore/Replate/Sleeve PK1699 316-3731 605M07000 316-1787 2756CD 316-2556 YZ250 92-98 68.0 68.0 Racers Choice 736M06800 316-1945 2677CS 316-2722 S508 316-3154 CW18 316-1905 B1014 316-7014 x 68.0 YZ250 WR250 92-94 92-94 68.0 68.0 Pro-Lite Deglaze / Hone PK1563 316-3627 677M06800 316-1637 2677CD 316-2535 S508 316-3154 CW18 316-1905 B1014 316-7014 x 68.5 Bore / Replate PK1564 316-3628 677M06850 316-1638 2697CD 316-2541 68.0 69.0 Bore / Replate PK1565 316-3629 677M06900 316-1639 2717CD 316-2547 70.0 Bore / Replate PK1566 316-3630 677M07000 379-5612 2756CD 316-2556 YZ250 WR250 95-98 95-98 68.0 68.0 Pro-Lite Deglaze / Hone PK1567 316-3631 677M06800 316-1637 2677CD 316-2535 S508 316-3154 CW18 316-1905 B1014 316-7014 x 68.5 Bore / Replate PK1568 316-3632 677M06850 316-1638 2697CD 316-2541 68.0 69.0 Bore / Replate PK1569 316-3633 677M06900 316-1639 2717CD 316-2547 70.0 Bore / Replate PK1570 316-3634 677M07000 379-5612 2756CD 316-2556 YZ250 99-01 66.4 66.4 Pro-Lite Deglaze / Hone PK1573 316-3637 804M06640 316-8085 2614CD 316-2511 S508 316-3154 CW18 316-1905 B1003 316-7003 x 68.5 Bore / Replate PK1574 316-3638 804M06850 379-5378 2697CD 316-2541 72.0 YZ250 YZ250X 02-16 2016 66.4 66.4 Pro-Lite Deglaze / Hone PK1198 316-1406 804M06640 316-8085 2614CD 316-2511 S508 316-3154 CW18 316-1905 B1003 316-7003 x 67.0 Bore / Replate PK1199 316-1407 804M06700 379-5642 2638CD 316-2520 72.0 67.5 Bore / Replate PK1200 316-1408 804M06750 379-5643 2658CD 316-2529 68.5 Bore / Replate PK1201 316-1409 804M06850 379-5378 2697CD 316-2541 YZ250 YZ250X 02-16 2016 66.4 66.4 ElectraCoated Deglaze / Hone PK1704 316-3736 808M06640 379-5467 2614CSA 316-0285 S508 316-3154 CW18 316-1905 B1003 316-7003 x Racers Choice 72.0 ArmorGlide YZ250 * Note: Cylinder, cylinder head, and powervalve modifications required 99-16 66.4 72.0 ElectraCoated Bore / Replate 878M07200 316-0648 2835CDA 316-0649 S508 316-3154 CW18 316-1905 B1003 316-7003 x ArmorGlide 72.0 Titanium Nitride coated rings DT400 MX400 75-78 75-76 85.0 85.0 Deglaze / Hone 232M08500 316-1674 3347TD 316-3347 S277 316-3108 CW18 316-1905 B1003 316-7003 x 85.5 Bore & Hone 232M08550 316-1675 3366TD 316-2817 70.0 86.0 Bore & Hone 232M08600 316-1676 3386TD 316-2821 86.5 Bore & Hone 232M08650 316-1677 3405TD 316-2824 IT400 YZ400 77-78 77-78 85.0 85.0 Deglaze / Hone 394M08500 316-1679 3347TD 316-3347 S277 316-3108 CW18 316-1905 B1003 316-7003 x 85.5 Bore & Hone 394M08550 316-1680 3366TD 316-2817 70.0 86.0 Bore & Hone 394M08600 316-1681 3386TD 316-2821 86.5 Bore & Hone 394M08650 316-1682 3405TD 316-2824 87.0 Bore & Hone 394M08700 316-1683 3425TD 316-2827 IT465 YZ465 81-82 80-81 85.0 85.5 Deglaze / Hone 451M08550 316-1685 3366TD 316-2817 S277 316-3108 CW18 316-1905 B1014 316-7014 X 86.0 Bore & Hone 451M08600 316-1686 3386TD 316-2821 82.0 86.5 Bore & Hone 451M08650 316-1687 3405TD 316-2824 IT490 YZ490 83-84 82-83 87.0 87.0 Deglaze / Hone 478M08700 316-1689 3425TD 316-2827 S277 316-3108 CW18 316-1905 B1014 316-7014 x 87.5 Bore & Hone 478M08750 316-1690 3445TD 316-2830 82.0 88.0 Bore & Hone 478M08800 316-1691 3465TD 316-2833 88.5 Bore & Hone 478M08850 316-1692 3484TD 316-2835 89.0 Bore & Hone 478M08900 316-1693 3504TD 316-2836 YZ490 WR500 84-90 92-93 87.0 87.0 Pro-Lite Deglaze / Hone PK1817 316-0060 546M08700 316-1694 3425TD 316-2827 S277 316-3108 CW18 316-1905 B1014 316-7014 x 87.5 Bore & Hone PK1818 316-0061 546M08750 316-1695 3445TD 316-2830 82.0 88.0 Bore & Hone PK1819 316-0062 546M08800 316-1696 3465TD 316-2833 88.5 Bore & Hone PK1820 316-0063 546M08850 316-1697 3484TD 316-2835 89.0 Bore & Hone PK1821 316-0071 546M08900 316-1698 3504TD 316-2836


2017moto_en
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