BOLD MAGENTA part numbers are new for 2027 PARTS-UNLIMITED.COM 2027 | SNOW ENGINE ENGINE 494 HIGH-PERFORMANCE SNOWMOBILE PISTONS (CONT) FITS MODEL NO. OF CYL. BORE X STROKE (MM) DISPL. (CC) SIZE (MM) PISTON/ GASKET KIT PART # PISTON PART # REPL. RING SET PART # REPL. WRIST PIN PART # REPL. CIRCLIPS PART # TOP END BEARING PART # YAMAHA (CONT) Nytro FX/RT2/RTX/XTX 08-14/MTX 06-12/MTX SE 08-14, RS Vector/LX/GT 10-15, RS Venture GT 09-15, SR Viper 14-15 3 82 x 66.2 1049 STD - 0910-4060 - - - - 12.5:1 Compression. ArmorGlide skirt coated. Kit includes head gasket only. Phazer 99-01,Venture XL Touring 99-00 2 72 485 STD - 2310M07200 2835CD S-257 CW18 B1003 Fan cooled. x 491 0.50 - 2310M07250 - - - - Cast iron bore. Pro-Lite, includes wrist pin. 59.6 499 1.00 - 2310M07300 2874CD - - - 508 1.50 - 2310M07350 - - - - SRV540 80-91,VK540 88-05, XL-V 86-90 2 73 535 STD - - 2874CD - CW20 B1023 Cast iron bore. x 543 0.50 SK1045 - - - - - Pro-Lite, includes wrist pin. 64 551 1.00 - 2305M07400 - - - - SRX440 78-80, SSR440 78-80 2 68.5 439 STD - 2282M06850 2697CSM S-423 CW20 - Liquid cooled. x Chrome bore. Cylider sleeving or replating required. 59.6 NOTE: Will not fit 81 model. SS440 80-85 2 66 437 STD - - 2598CD S-477 CW18 B1003 Cast iron bore. Includes wrist pin. x 0.25 - - 2608CD - - - 64 0.50 - - 2618CD - - - 1.00 - - 2638CD - - - 1.50 - - 2658CD - - - SX 500R 00-01,Venture 500 99-01,Vmax 500 94-01, 2 68 493 STD - 2356M06800 2677CD S-423 CW20 B1031 Nikasil bore. x Pro-Lite, includes wrist pin. 68 SX Viper 02-04, SX Viper Mountain 03-06,Venture 700 04 3 69 696 STD SK1325 2397M06900 2717CD S-423 CW20 - Liquid cooled. Electra Coated. x Nikasil bore. Pro-Lite. 62 REPLACEMENT RING SETS •Each ring set is for one piston •See Wiseco ring buyer’s guide for details NOTE: Wiseco rings fit only Wiseco pistons. WRIST PINS • Strong, lightweight and can be used with either OEM or Wiseco pistons REPLACEMENT WRIST PINS OD/LENGTH PART # 16 mm/1.850” S-270 18 mm/2.0748” S-477 18 mm/2.2047” S-257 18 mm/2.3031” S-513 OD/LENGTH PART # 20 mm/2.185” S-423 20 mm/2.559” S-461 24 mm/2.1752” S-486 CIRCLIPS • Two high-strength, easy-to-install circlips furnished with every piston •Order additional inventory from the chart below REPLACEMENT CIRCLIPS SIZE PART # 16 mm CW16 18 mm CW18 20 mm CW20 SIZE (MM) PART # 16 x 20 x 19.5 B1016 16 x 20 x 22.5 B1021 16 x 21 x 19.5 B1008 18 x 22 x 22 B1003 SIZE (MM) PART # 18 x 23 x 22 B1014 20 x 25 x 23 B1031 20 x 25 x 25 B1023 20 x 26 x 24 B1024 TOP END BEARINGS •Wiseco top end bearings, OEM quality or better
RkJQdWJsaXNoZXIy