BOLD MAGENTA part numbers are new for 2025 ENGINE & COOLING PARTSCANADA.COM ATV/UTV | 2025 ENGINE & COOLING 625 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 4-6 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. FITS MODEL BORE SIZE PART # POLARIS Ranger 800 10 Std. 0903-1687 Ranger 800 EFI/Crew 11-14 Std. 0903-1690 Ranger 800 EFI 6x6 11-16 Std. 0903-1690 RZR 800 EFI 08-10 Std. 0903-1687 Sportsman 800 6x6 11-14 Std. 0903-1690 FITS MODEL BORE SIZE PART # POLARIS (CONT) Sportsman 800 EFI Non-H.O. 05-10 Std. 0903-1687 Sportsman 800 EFI Non-H.O. 11-14 Std. 0903-1690 Sportsman 800 EFI 6x6 09-10 Std. 0903-1687 Sportsman X2 800 EFI 07-09 Std. 0903-1687 ENGINE REBUILD KITS •Complete rotating and reciprocating rebuild kit including crankshaft assembly, main bearings and seals, pistons and components and a complete engine gasket kit •All components were developed through extensive research and development on Pro-X in-house engine dyno •Crankshafts come completely assembled using Maxima® assembly lube and are inspected in-house for proper dimensions and trueness •Connecting rods feature proprietary design done in-house, and are forged, heat-treated and shot-peened for ultimate tensile strength and reduced stress risers •Connecting rods include graded bearings in the big end to ensure proper clearance, as well as a bronze bushing in the small end, both improving longevity and performance •Pistons are cast from OEM-grade alloy and feature MoS2 skirt coating and hard-anodized crown and ring grooves for improved performance and wear resistance through reduced friction and improved heat resistance DESCRIPTION PART # Crankshaft assembly kit 0921-0114 CRANKSHAFT KIT FOR YAMAHA YFZ350 BANSHEE 87-06 • Includes crankshaft, top end bearing, premium main bearings and a complete bottom end gasket set that includes all seals and gaskets needed to do the job •Only one part number to stock and order •Crankshafts are factory assembled and precision trued to OEM specifications •Double-forged Wiseco connecting rods maintain superior dimensional consistency through improved grain flow •Shot-peening eliminates residual stresses and smoothly blends the rod forging surfaces •Corrosion-resistant surface treatment •Top and bottom end rod bores case hardened to 58-62 RC to optimize bearing running surface •Crank pin bearing radial running clearance is optimized to ensure maximum performance •Precision honing ensures ultra-round bearing surface •Precision engineered oiling slots maximize rod strength and bearing life •Double-drilled small ends provide the piston pin with extra lubrication and cooling, reducing distortion of top end due to thermal transfer from the piston •Silver-coated bronze phosphor thrust washers, with dimpled design to increase oil retention and reduce friction between rod and washer interface •Crank pin bearings are manufactured from the highest quality hot rolled steel; case-hardened to 58-62 RC •Caged needle roller bearings provide the highest possible rpm •Precision-machined crank webs 0903-1687
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