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New Crankshaft Main Bearing And Seal Kit Compatible With 2016-2021 Yamaha Yz250 Yz250x 249Cc

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K012A1
OEM PART NUMBERS:
• Yamaha: 93306-37808-00 (Crankshaft Main Bearing — 2x required per engine)
• Yamaha: 93306-20593-00 (Crankshaft Main Bearing — alternate part number)
• Yamaha: 93306-205A5-00 (Crankshaft Main Bearing — alternate part number)
• Yamaha: 93211-02703-00 (Crankshaft Oil Seal)
• Yamaha: 93340-21505-00 (Crankshaft Oil Seal — alternate part number)
• Catalog Kit Reference: K012

SPECIFICATIONS:
• Type: Crankshaft Main Bearing and Oil Seal Kit
• Application: Bottom-End Rebuild / Crankshaft Replacement
• Engine Coverage: Yamaha YZ250 / YZ250X 2-Stroke Single-Cylinder Liquid-Cooled (2001-2021)
• Engine Displacement: 249cc
• Bore × Stroke: 66.4mm × 72.0mm
• Year Range: YZ250 2001-2021 / YZ250X 2016-2021
• Cylinder Configuration: Single-Cylinder Inline 2-Stroke Liquid-Cooled with YPVS Power Valve
• Transmission: 5-Speed (YZ250) or Wide-Ratio 5-Speed (YZ250X)
• Kit Contents: 2x Crankshaft Main Bearings (Prelubed and Packaged with Waterproof Grease), 2x Crankshaft Oil Seals (Left and Right) with Sealing Lip
• Models Covered: YZ250 Standard 2-Stroke Motocross and YZ250X Off-Road / Enduro Variant
• Use: Compatible with Yamaha OEM and Hot Rods aftermarket crankshafts
• Condition: New

APPLICATIONS:
• Yamaha YZ250 2-Stroke 249cc Single-Cylinder Liquid-Cooled Motocross (2001-2021)
• Yamaha YZ250X 2-Stroke 249cc Single-Cylinder Liquid-Cooled Off-Road / Enduro (2016-2021)
• 2001 major bottom-end redesign through 2021 modern production
• DOES NOT FIT 1999-2000 YZ250 (use K011) or pre-1999 YZ250 — different bearings required

PRODUCT NOTICE:
As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but are designed to function the same as - if not better than - the original. All parts sold are new.

WARNING - This product may expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

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Description

YAMAHA YZ250 2-STROKE MOTOCROSS — 249cc Single-Cylinder Liquid-Cooled (2001-2021):
• Yamaha YZ250 249cc 2-Stroke Single-Cylinder Liquid-Cooled (2001-2005, Major Redesign Era — New Bottom-End Architecture)
• Yamaha YZ250 249cc 2-Stroke Single-Cylinder Liquid-Cooled (2006-2010, Aluminum Bilateral Beam Frame Era)
• Yamaha YZ250 249cc 2-Stroke Single-Cylinder Liquid-Cooled (2011-2015, Refined Aluminum Frame Generation)
• Yamaha YZ250 249cc 2-Stroke Single-Cylinder Liquid-Cooled (2016-2021, Modern 2-Stroke Production Era)
• Yamaha YZ250 66.4mm Bore × 72.0mm Stroke 2-Stroke YPVS Power Valve Race-Spec Motocross

YAMAHA YZ250X OFF-ROAD / ENDURO 2-STROKE VARIANT — 249cc (2016-2021):
• Yamaha YZ250X 249cc 2-Stroke Single-Cylinder Liquid-Cooled Off-Road / Enduro (2016-2018)
• Yamaha YZ250X 249cc 2-Stroke Single-Cylinder Liquid-Cooled Off-Road / Enduro (2019-2021)
• Same bottom-end engine as standard YZ250 with wide-ratio 5-speed transmission and off-road-tuned suspension
• YZ250X launched 2016 as Yamaha's purpose-built 2-stroke enduro / cross-country variant

NOTES:
• Compatible with Yamaha OEM crankshafts and aftermarket Hot Rods replacement crankshafts
• Same kit fits both standard YZ250 (2001-2021) and YZ250X off-road variant (2016-2021) — same bottom-end engine architecture
• 2001 represents a major bottom-end redesign for the YZ250 (NEW crankshaft bearings vs the 1999-2000 generation)
• 1999-2000 YZ250 uses different bearings (covered by separate K011 kit) — verify before ordering
• Quality alternative to expensive Yamaha OEM main bearings and crankshaft seals
• Recommended for any bottom-end rebuild, crankshaft replacement, or seal-out repair
• Bearings prelubed and packaged with waterproof grease; crank seals feature sealing lip designed to reduce crank pin wear
• YPVS power valve system requires correct seal orientation during installation
• 21-year production span demonstrates Yamaha's commitment to the 2-stroke YZ250 platform

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  • Item Requires Shipping
  • 2.0 lbs.
  • W9.0000” x H0.8000” x L12.0000”
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