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New Crankshaft Main Bearing And Seal Kit Compatible With 2009-2019 Yamaha Yfz450r 449Cc 4-Stroke

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K070A1
OEM PART NUMBERS:
• Yamaha: 93306-27803-00 (Crankshaft Main Bearing — primary, 2x required per engine)
• Yamaha: 93306-20532-00 (Crankshaft Main Bearing — alternate)
• Yamaha: 93306-30644-00 (Crankshaft Main Bearing — alternate)
• Yamaha: 93340-21505-00 (Crankshaft Oil Seal — primary)
• Yamaha: 93311-62574-00 (Crankshaft Oil Seal — alternate)
• Catalog Kit Reference: K070

SPECIFICATIONS:
• Type: Crankshaft Main Bearing and Oil Seal Kit
• Application: Bottom-End Rebuild / Crankshaft Replacement
• Engine Coverage: Yamaha YFZ450R 4-Stroke Single-Cylinder Liquid-Cooled DOHC 5-Valve Sport ATV Platform
• Engine Displacement: 449cc
• Bore × Stroke: 95mm × 63.4mm
• Engine Code: YFZ450R 2009+ Engine Platform
• Year Range: YFZ450R 2009-2019+ / YFZ450R SE 2009-2013 / YFZ450X 2010-2011 / YFZ450X Bill Ballance 2010 / YFZ450X SE 2011
• Cylinder Configuration: Single-Cylinder Inline 4-Stroke Liquid-Cooled DOHC 5-Valve (3 Intake + 2 Exhaust — Yamaha 5-Valve Head Architecture)
• Transmission: Manual 5-Speed with Reverse (Manual Clutch)
• Fuel Delivery: Mikuni 42mm Electronic Fuel Injection (EFI), Yamaha Chip-Controlled Throttle (YCC-T)
• Lubrication: Wet Sump
• Kit Contents: 2x Crankshaft Main Bearings (Prelubed and Packaged with Waterproof Grease), 2x Crankshaft Oil Seals (Left and Right) with Sealing Lip
• Models Covered: Yamaha YFZ450R Standard, YFZ450R Special Edition (RSE), YFZ450R Bill Ballance Edition, YFZ450X, YFZ450X Bill Ballance Edition, YFZ450X SE
• Use: Compatible with Yamaha OEM and Hot Rods aftermarket crankshafts
• Condition: New

APPLICATIONS:
• Yamaha YFZ450R 4-Stroke 449cc Single-Cylinder Liquid-Cooled DOHC 5-Valve Sport ATV (2009-2019+)
• Yamaha YFZ450R Special Edition (RSE) 449cc 4-Stroke Sport ATV (2009-2013)
• Yamaha YFZ450X 449cc 4-Stroke Racing-Focused Trail/Cross-Country ATV (2010-2011)
• Yamaha YFZ450X Bill Ballance Edition (2010), YFZ450X SE Special Edition (2011)
• 2009 = launch year of YFZ450R, 2014 = major chassis update with unchanged bottom-end
• DOES NOT FIT 2004-2013 Yamaha YFZ450 non-R (use K022 kit) — different engine platform

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

Was: $187.04
Sale: $106.88
Save: 43%
Save: $80.16
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Description

YAMAHA YFZ450R FLAGSHIP SPORT ATV — 449cc 4-Stroke Single-Cylinder Liquid-Cooled DOHC 5-Valve (2009-2019+):
• Yamaha YFZ450R 449cc 4-Stroke Single-Cylinder Liquid-Cooled DOHC 5-Valve Sport ATV (2009, LAUNCH Year — Yamaha's Flagship Sport ATV with Major Redesign of YFZ450 Platform Including Fuel Injection, Aluminum Frame, Longer Wheelbase)
• Yamaha YFZ450R 449cc 4-Stroke Sport ATV (2010-2013, Early Production Era)
• Yamaha YFZ450R 449cc 4-Stroke Sport ATV (2014, MAJOR Chassis Update — Bottom-End Unchanged)
• Yamaha YFZ450R 449cc 4-Stroke Sport ATV (2015-2019, Modern Production Era)
• Yamaha YFZ450R 95mm Bore × 63.4mm Stroke 4-Stroke 5-Speed with Reverse Manual Clutch Sport ATV
• Mikuni 42mm Electronic Fuel Injection, Yamaha Chip-Controlled Throttle (YCC-T)

YAMAHA YFZ450R SPECIAL EDITION (RSE) VARIANTS (2009-2013):
• Yamaha YFZ450R SE Special Edition 449cc 4-Stroke Sport ATV (2009-2013, Premium Trim Variant — Same Engine Bottom-End as Standard YFZ450R)
• Bill Ballance Edition (special edition honoring legendary ATV racer Bill Ballance)

YAMAHA YFZ450X RACING-FOCUSED TRAIL/CROSS-COUNTRY VARIANT (2010-2011):
• Yamaha YFZ450X 449cc 4-Stroke Single-Cylinder Liquid-Cooled DOHC 5-Valve Racing-Focused Trail / Cross-Country ATV (2010, LAUNCH Year — Enduro/Trail Variant of YFZ450R)
• Yamaha YFZ450X 449cc 4-Stroke Trail ATV (2011, FINAL Production Year — Discontinued After 2011)
• YFZ450X = Yamaha's racing-focused trail/cross-country variant — brief 2-year production run
• Yamaha YFZ450X Bill Ballance Edition (2010, Special Edition)
• Yamaha YFZ450X SE Special Edition (2011)

NOTES:
• Compatible with Yamaha OEM crankshafts and aftermarket Hot Rods replacement crankshafts
• 2009 was the LAUNCH year of the YFZ450R — Yamaha's redesigned flagship sport ATV with fuel injection, aluminum frame, and longer wheelbase compared to the predecessor YFZ450
• YFZ450R has been in production since 2009 (15+ years on the same engine platform)
• 2014 introduced a MAJOR chassis update, but the engine bottom-end remained unchanged
• YFZ450X was the racing-focused trail/cross-country variant — limited 2-year production (2010-2011), discontinued after 2011
• DOES NOT FIT 2004-2013 Yamaha YFZ450 (non-R, use K022 kit instead) — different engine platform
• DOES NOT FIT Yamaha Raptor 700 / Grizzly 700 / Wolverine 700 (use K053 or K054 kit) — different engine
• Yamaha 5-valve cylinder head architecture (3 intake + 2 exhaust)
• 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
• 5-speed transmission with reverse, DOHC 5-valve cylinder head, wet sump lubrication, electronic fuel injection

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  • 2.0 lbs.
  • W9.0000” x H0.8000” x L12.0000”
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