2012 Yamaha YZ250F(B) Service Manual (P/N 17D-28199-32-E0)

• Covers 2012 Yamaha YZ250F(B) competition-use motorbikes, including US, Canada, Europe, Australia, New Zealand, and South African variants
• Official Yamaha publication P/N 17D-28199-32-E0, specifically documenting the 17D-series build
• Includes 193 pages of technical specifications, torque values, and maintenance intervals for the YZ250F engine and chassis
• Details the original FCR-MX39 carburetor setup and internal engine tolerances used for the 2012 model launch

Technical Documentation Overview

The 2012 Yamaha YZ250F(B) service manual provides specialized documentation for maintaining the 250 cm3 liquid-cooled DOHC engine and link-type monocross suspension system. It breaks down procedures ranging from routine air filter maintenance to precise valve clearance adjustments and carburetor tuning. Technicians will also find detailed guidance for chassis and electrical system inspections.

Chapters dedicated to heavy engine work outline the teardown and reassembly of the cylinder head, camshafts, piston, and crankshaft. Moving to the chassis, the reference covers steering head, front fork, and rear swingarm maintenance, laying out the exact factory procedures required to service this competition machine. Working on high-performance motorcycles carries inherent physical risks. Always rely on the official torque specifications and safety procedures outlined within the actual workshop reference before beginning any hands-on work.

Technical Specification Highlights

Standard torque values for critical fasteners are documented extensively throughout the guide. For example, cylinder head stud bolts require 15 Nm (11 ft-lb), while the primary drive gear is set to 75 Nm (54 ft-lb). Engine oil capacity is strictly specified at 0.95 L for a periodic change, increasing to 1.05 L during an oil filter replacement. The coolant system holds exactly 1.00 liters.

You will also find complete ignition timing data for the CDI magneto system. Intake valve clearances must measure between 0.12 and 0.17 mm, matching the cylinder head specification tables. Additionally, the piston-to-cylinder clearance target is tightly set at 0.030–0.055 mm. All data provided here serves as a brief reference outline of the publication's contents.