2011 Yamaha Grizzly 450 EPS ATV Service Manual

This Yamaha Grizzly 450 EPS manual covers 2011-2013 models including the YFM450FGP. Get access to comprehensive service, repair, and diagnostic procedures, publication

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Yamaha Models Covered & Key Technical Specifications

Models: YFM45FGA, YFM45FGHA, YFM45FGPA, YFM45FGPHA

Sub-models / Variants: 4WD, Grizzly 450, EPS, Cast wheel model

Model Years: 2011

Technical Data:

  • Engine: Liquid-cooled 4-stroke, SOHC, forward-inclined single cylinder

  • Displacement: 421 cm3

  • Bore x stroke: 84.5 x 75.0 mm

  • Compression ratio: 10:1

  • Starting system: Electric starter

  • Compression pressure: 1,270 kPa (12.7 kg/cm2, 181 psi) at 700 r/min

  • Drive system: Shaft drive

  • Front tire: AT25 x 8-12

  • Rear tire: AT25 x 10-12

  • Final gear oil: Yamaha Friction Modified Shaft Drive Gear Oil or SAE 80 API GL-4 Hypoid gear oil

Technical Specifications
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Document Number / Seller:
31448 / Ronald Young
File Size:
50.57 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
ATV
Last updated / verified
Jun 4, 2026

Yamaha Manual Features & Content Preview

2011 Yamaha Grizzly 450 EPS Supplementary Service Manual

  • Covers 2011 Yamaha Grizzly 450 4WD EPS ATV models (YFM45FGA, YFM45FGHA, YFM45FGPA, and YFM45FGPHA)
  • Official Yamaha publication LIT-11616-24-39 (First Edition, August 2010)
  • 100 pages of technical specifications, cable routing diagrams, and maintenance charts
  • Instant PDF download—get to work immediately with no shipping delays
  • Fully searchable OCR text lets you pull up specific torque specs in seconds
  • Essential reference detailing the specific EPS configuration and cable routing for the final YFM45 build

Manual Coverage and Workshop Utility

Getting a Grizzly back on the trail requires precise data. This supplementary publication focuses squarely on the chassis, drivetrain, and electrical systems for the 2011 EPS variants. You will find dedicated chapters breaking down the Electric Power Steering (EPS) block diagrams and operational logic. It also lays out the exact maintenance schedules for emission controls, final gear case assemblies, and steering stem installations. Having the right serial-coded configurations at your fingertips eliminates guesswork and speeds up diagnostics on the bench.

Specifications and Technical Data

The technical sections deliver critical reference values for the 421 cm³ liquid-cooled engine. Whether you need the exact tightening torques for the pitman arm and steering stem bolts, or you are verifying the final gear backlash (0.10–0.15 mm) and brake pedal height (75.0–85.0 mm), the data is right here. Electrical troubleshooting is also streamlined, noting the stator charging output at 14.0 V at 5,000 r/min specifically for EPS-equipped units.

Keep in mind that working on steering and drivetrain systems carries inherent risks. To ensure your safety and the reliable operation of the vehicle, carefully verify the OEM parameters and specifications outlined in this document before starting any physical repairs or adjustments.

Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

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