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Crankshaft Main Bearing And Seal Kit Compatible With 2004 Honda Trx450r 449Cc 4-Stroke

K046A1
OEM PART NUMBERS:
• Honda: 91001-HP1-671 (Right Crankshaft Main Bearing — primary, 2x required per engine)
• Honda: 91008-HP1-672 (Crankshaft Bearing — alternate part number)
• Honda: 91201-HP1-671 (Left Crankshaft Oil Seal — primary)
• Honda: 91202-HP1-671 (Right Crankshaft Oil Seal — primary)
• Honda: 91202-HP1-672 (Right Crankshaft Oil Seal — alternate part number)
• Catalog Kit Reference: K046

SPECIFICATIONS:
• Type: Crankshaft Main Bearing and Oil Seal Kit
• Application: Bottom-End Rebuild / Crankshaft Replacement
• Engine Coverage: Honda TRX450R 4-Stroke Single-Cylinder Liquid-Cooled Sport ATV
• Engine Displacement: 449cc
• Bore × Stroke: 96mm × 62.1mm
• Engine Code: TRX450R (HP1 Engine Family)
• Year Range: 2004-2005 (First-Generation TRX450R — Kick-Start Only)
• Cylinder Configuration: Single-Cylinder Inline 4-Stroke Liquid-Cooled Unicam SOHC 4-Valve
• Transmission: Manual 5-Speed with Reverse
• Starting: Kick-Start Only
• Lubrication: Wet Sump
• Kit Contents: 2x Crankshaft Main Bearings (Prelubed and Packaged with Waterproof Grease), 2x Crankshaft Oil Seals (Left and Right Side) with Sealing Lip
• Models Covered: Honda TRX450R First-Generation Sport ATV (2004 Launch through 2005 Final First-Gen Year)
• Use: Compatible with Honda OEM and Hot Rods aftermarket crankshafts
• Condition: New

APPLICATIONS:
• Honda TRX450R 4-Stroke 449cc Single-Cylinder Liquid-Cooled Unicam SOHC Sport ATV (2004-2005)
• HP1 engine family variant
• 2004 = launch year (replaced 2-stroke TRX250R)
• 2005 = final year of first-generation bottom-end
• DOES NOT FIT 2006 and Newer Honda TRX450R or TRX450ER — different crankshaft 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

HONDA TRX450R 4-WHEEL SPORT ATV — 449cc 4-Stroke Liquid-Cooled Unicam SOHC (2004-2005):
• Honda TRX450R 449cc 4-Stroke Single-Cylinder Liquid-Cooled Unicam SOHC 4-Valve Sport Quad (2004, LAUNCH Year — Honda's First Pure-Sport 4-Stroke ATV, Replaced TRX250R)
• Honda TRX450R 449cc 4-Stroke Single-Cylinder Liquid-Cooled Unicam SOHC 4-Valve Sport Quad (2005, FINAL First-Generation Year — 2006 Brought New Bottom-End)
• Honda TRX450R Kick-Start Only Manual 5-Speed Transmission with Reverse
• Honda TRX450R 96mm Bore × 62.1mm Stroke 4-Stroke Race-Spec Sport ATV

SPECIFIC MODEL YEARS COVERED:
• Honda TRX450R 2004 (Launch Year — Honda's Response to the Yamaha YFZ450)
• Honda TRX450R 2005 (Final First-Generation Year — Last Year Before 2006 Bottom-End Redesign)

NOTES:
• Compatible with Honda OEM crankshafts and aftermarket Hot Rods replacement crankshafts
• 2004 was the LAUNCH year of the TRX450R — Honda's flagship pure-sport 4-stroke ATV that REPLACED the legendary 2-stroke TRX250R
• 2004-2005 = FIRST GENERATION TRX450R (kick-start only, manual clutch)
• 2006+ TRX450R uses different crankshaft bearings (covered by separate kit) — verify before ordering
• 2006+ TRX450ER electric-start variant also uses different bottom-end
• Same Unicam SOHC engine architecture as the Honda CRF450R motocross bike (different bottom-end specifics)
• Quality alternative to expensive Honda 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, wet sump lubrication, HP1 engine family

Details

Shipping Information

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

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