BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | STREET ENGINE ENGINE 1370 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 BIG BORE KIT CRANKSHAFT REPLACEMENT TOP-END GASKET KIT MALAGUTI F10 (air cooled) 0931-0077 0921-0020 0934-0639 F15/Italjet Dragster (liquid cooled) - 0921-0020 - FITS MODEL BIG BORE KIT CRANKSHAFT REPLACEMENT TOP-END GASKET KIT YAMAHA BW/Zuma1 (vertical engine) 98-01 0931-0076 0921-0019 0934-0638 Vino 50/Jog/Zuma2 (horizontal engine) 02-05 0931-0077 0921-0020 0934-0639 REPLACEMENT PISTON KITS (FOR ALL SCOOTER MODELS LISTED ABOVE) SIZE PART # Std. 0910-0581 REPLACEMENT REEDS DESCRIPTION PART # Repl. reeds for PART #0931-0076 1008-0281 70CC BOLT-ON BIG BORE CYLINDER KITS FOR SCOOTERS •Kits come complete with aluminum cylinder (with a nickel carbide-plated 1.87” bore), cylinder head, piston assembly (piston, rings, 10 mm wrist pin and circlips), carbon reeds and all required top-end gaskets •Optional high-performance crankshafts (sold separately) replace OEM and are manufactured to Athena’s highest standards •Replacement top-end gasket kits and piston kits also available separately NOTE: It is recommended that Athena’s 0.68” or 0.74” Scooter carburetor be used with these bolt-on big bore kits. See Fuel Systems section. DESCRIPTION PART # Wrist pin bushing 0923-0318 WRIST PIN BUSHING FOR TRIUMPH 650/750 63-83 •Machined from solid proprietary bronze alloy bar stock with an exceptional Rockwell hardness rating •Highest-quality wrist pin bushing available •Sold each • 0.814” OD x 0.688” ID; 1.031” overall length •Made in the U.S.A. DESCRIPTION PART # High gear bushing 0926-2854 HIGH GEAR BUSHING FOR TRIUMPH 650 63-72 • Replace single, OEM-style bushing •Maintain bearing surface while the gap between each bushing provides a large cavity for oil to pool, aiding in lubrication of the shaft • 0.910” OD x 0.810” ID; 1.100” overall length 0921-0020 0931-0076 0934-0639
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