BOLD MAGENTA part numbers are new for 2025 BELTS, CHAINS & SPROCKETS PARTS-UNLIMITED.COM ATV/UTV | 2025 737 2 Inner countershaft only. 3 Rear driven sprocket. FITS MODEL STOCK GEARING CHAIN SIZE FRONT SIZE PART # REAR SIZE PART # SPROCKET TYPE POLARIS (CONT) Trail Blazer 250 94 Trail Blazer 250 95 Trail Blazer 250 ES 96-98 Trail Blazer 250 99-06 11-40 520-86 11 36411 34 2-334134 (Steel) 11-42 520-88 12 36412 36 1210-0187 (Steel) 11-42 520-88 38 2-334138 (Steel) 11-38 520-86 40 2-334140 (Steel) 42 2-334142 (Steel) Trail Boss 250 85-89 Trail Boss 250 90 Trail Boss 250 91-93 Trail Boss 250 2x4 88-92 13-42 520-88 13 36313 34 2-334134 (Steel) 13-38 520-86 36 1210-0187 (Steel) 13-34 520-84 38 2-334138 (Steel) 13-38 520-86 40 2-334140 (Steel) 42 2-334142 (Steel) Trail Boss 250 94 Trail Boss 250 95-99 11-40 520-86 11 36411 34 2-334134 (Steel) 12-42 520-88 12 36412 36 1210-0187 (Steel) 38 2-334138 (Steel) 40 2-334140 (Steel) 42 2-334142 (Steel) Big Boss 250 4x6 89 Axle to axle 13-42 520-88 13 36313 42 2-334142 (Steel) 30-30 520-108 Big Boss 4x6 250 90-92 Axle to axle 11-42 520-88 12 364122 42 2-334142 (Steel) 30-30 520-108 Big Boss 6x6 250 91-92 Front Center outer Axle to axle 12-42 520-88 11 36411 42 2-3341423 (Steel) - 520-64 12 364122 - 520-72 22 36622 30-30 520-108 Trail Boss 250 4x4 87-88 Center outer 12-42 520-74 11 36411 42 2-3341423 (Steel) - 520-76 12 364122 22 36622 Trail Boss 250 4x4 89 Front Center outer 12-42 520-88 11 36411 42 2-3341423 (Steel) - 520-64 12 364122 - 520-70 22 36622 Trail Boss 250 4x4 90-92/93 Front Center outer 12-42 520-88 11 36411 42 2-3341423 (Steel) - 520-64 12 364122 - 520-70 22 36622 250 6x6 93 Front Axle to axle 12-42 520-88 11 36411 42 2-3341423 (Steel) - 520-64 12 364122 30-30 520-108 22 36622 Xplorer 300 4x4 96-99 Front Center outer 13-40 520-84 11 36411 40 2-3341403 (Steel) - 520-64 13 363132 - 520-70 22 36622 300 4x4 94-95 Front Center outer 13-40 520-84 11 36622 40 2-334140 (Steel) - 520-64 13 363132 - 520-70 22 36622 Xpress 300 96-99 12-38 520-86 11 36411 34 2-334134 (Steel) 12 36412 36 1210-0187 (Steel) 38 2-334138 (Steel) 40 2-334140 (Steel) 42 2-334142 (Steel) 300 6x6 94 Front Axle to axle 13-40 520-84 11 36411 42 2-3341423 (Steel) - 520-64 13 363132 30-30 520-108 22 36622 Trail Boss 325 00 Trail Boss 325 01 Trail Boss 325 02 11-42 520-86 11 36411 34 2-334134 (Steel) 11-40 520-86 12 36412 36 1210-0187 (Steel) 12-42 520-88 38 2-334138 (Steel) 40 2-334140 (Steel) 42 2-334142 (Steel) Trail Boss 330 02-13 Trail Blazer 330 08-13 11-40 520-86 11 36411 34 2-334134 (Steel) 11-40 520-86 12 36412 36 1210-0187 (Steel) 38 2-334138 (Steel) 40 2-334140 (Steel) 42 2-334142 (Steel) Sportsman 350 4x4 93 12-34 520-64 12 364122 34 2-3341343 (Steel) 22 36622 Trail Boss 350L 2x4 90-92 Trail Boss 350L 2x4 93 13-34 520-84 11 36411 34 2-334134 (Steel) 13-34 520-84 12 36412 36 1210-0187 (Steel) 13 36313 38 2-334138 (Steel) 40 2-334140 (Steel) 42 2-334142 (Steel) Trail Boss 350L 4x4 90-91 12-34 520-84 12 364122 34 2-3341343 (Steel) 22 36622 Trail Boss 350L 4x4 92 12-34 520-84 12 364122 34 2-3341343 (Steel) 22 36622 SPROCKETS (CONT) SPROCKETS continued on next page.
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