BOLD MAGENTA part numbers are new for 2023 PARTS-UNLIMITED.COM 2023 | SNOW ENGINE 578 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 REPL. CIRCLIPS TOP END BEARING SKI-DOO (ROTAX ENGINE) (CONT) 453 Engine Type 2 65 437 STD 0903-0085 0910-0564 - S-280 CW18 - MXZ 440 99-06, MX Z 440 Racing LC 04-07 x Liquid Cooled 65.8 Pro-Lite Nikasil Bore 454 Engine Type 2 67.5 437 STD SK1205 2375M06750 - S-477 CW18 - MXZ 440 Cross Country 95-98 x 0.50 0903-1188 - - Liquid cooled. Pro-Lite, includes wrist pin. 61 Cast iron bore. Kit does not include top-end gasket kit. 467 Engine Type 2 69.5 463 STD SK1027 2312M06950 2736CD - CW18 B1003 SS25SP 84, Formula SS 467 85, Formula GLX 90, x 466 0.25 - 0910-3983 2746CD Formula MXZ 93-94, Formula XT 94, 61 469 0.50 - 2312M07000 2756CD Formula MX 85-95 475 1.00 - - 2776CD Cast iron bore. 503 Engine Type 2 72 497 STD 0903-1189 2373M07200 - S-513 CW18 B1003 Blizzard 5500 79-81, Everest 500 80-83, Everest x 504 0.50 - 2373M07250 - 500E 80-83, Blizzard 5500 MX 82-84, Escapade 61 506 1.00 - 2373M07300 - 87-89,Voyager 89,Alpine 500 83-90, Cheyenne 511 1.50 0903-1190 2373M07350 - 89-91,Alpine 500 94, Safari 503 93-94, Safari 503 LC 86-94, Skandic 500 87-94, Formula SL 96-99, Touring SLE 95-99, Formula Deluxe 500F 99-01, Grand Touring Cargo F 01,Touring 500 Fan 01, Grand Touring F 01-02, MXZ 500 Fan 01-02, Skandic 500 96-02, Summit 500 Fan 01-02, Skandic 500 Sport 03, Skandic 550 SWT 96-03, Skandic 550 WT 96-03 Pro-Lite, includes wrist pin. Cast iron bore. Kits do no include gaskets. 494 Engine Type 2 69.5 499 STD SK1243 2381M06950 2736CD S-511X CW18 - Formula Z 500 99, Grand Touring 500 96-99, x 506 0.50 SK1244 2381M07000 2756CD MXZ 500 98-99, Skandic 500 WT LC 98-99, 65.8 512 1.00 0903-1213 2381M07050 2776CD Formula 500 LC 00, Formula Deluxe 500 LC 98-00, Summit 500 97-00,Touring 500 LC 00, MXZ 500 Trail 01, Grand Touring Std. 500 01 Note: Fits rotary valve motors only. Pro-Lite, includes wrist pin. Cast iron bore. 493 Engine Type: MXZ500 00-03, MXZ500 Trail 2 69.5 499 STD SK1322 2436M06950 2736CS - CW18 - 01, Formula Deluxe 500 01, Grand Touring 500 x 506 0.50 SK1323 0910-4025 2756CS 01-03, Legend 500 02-03 65.8 514 1.00 0903-1232 0910-4026 2776CS Pro-Lite, includes wrist pin Cylinder reed motor. Cast iron bore. Liquid-cooled. 537 Engine Type 2 72 521 STD 0903-1191 2373M07200 - S-513 CW18 B1003 Formula Plus 521 86-88 x 528 0.50 0903-1192 2373M07250 - Pro-Lite, includes wrist pin. Liquid cooled. 64 535 1.00 0903-1193 2373M07300 - Cast iron bore. 543 1.50 0903-1194 2373M07350 - 536 Engine Type 2 72 521 STD - 2373M07200 - S-513 CW18 B1003 Formula Plus 521 89-91 x 0.50 0903-1196 2373M07250 - Pro-Lite, includes wrist pin. Liquid cooled. 64 1.00 - 2373M07300 - Cast iron bore. 1.50 - 2373M07350 - 550F Engine Type 03-19 Expedition Sport 05-19, Freestyle Backcountry 2 76 553 STD 0903-0606 0910-4032 - - CW20 - 07-08, Freestyle Park 07-08, Freestyle Session 07, x 561 0.50 0903-0607 0910-4033 Grand Touring 03/0-15, GSX Fan 05-08, GTX Fan 05-08, 61 568 1.00 0903-0608 0910-4034 - Legend 03-04, MXZ Fan 03-08, MXZ 550 X 07-08, Skandic SUV 04-19, Skandic SWT 04-19, Skandic Tundra LT 08, Skandic WT 04-19, Summit Fan 03-08,Tundra 09-19 Fan Cooled 582 Engine Type 2 76 581 STD - 2376M07600 2992LT S-477 CW18 B1003 Mach I Rave Valve 89-90, Formula Plus X 93, x 588 0.50 0903-1199 2376M07650 - Formula STX 94-96, Formula 583 97, 64 596 1.00 0903-1200 2376M07700 - Formula DL 98, MXZ 583 98, Summit 583 94-98, 604 1.50 - 2376M07750 - Formula Z 583 94-99 611 2.00 0903-1202 2376M07800 - Pro-Lite, includes wrist pin. Liquid cooled, cast iron bore. 583 Engine 2 76 581 STD SK1226 2376M07600 2992LT S-477 CW18 B1003 Mach I Rave Valve 89-90, Formula Plus X 93, x 588 0.50 SK1227 2376M07650 - Formula STX 94-96, Formula 583 97, Formula DL 64 596 1.00 0903-1203 2376M07700 - 98, MXZ 583 98, Summit 583 94-98, Formula Z 583 604 1.50 0903-1204 2376M07750 - 94-99, 583-Z 98, STX-Z 94-96 611 2.00 - 2376M07800 - Pro-Lite, includes wrist pin. Liquid cooled, cast iron bore.
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