Yamaha TZR250 2MA Series 1987 Service Manual (P/N 2MA-28197-80)

• Covers the 1987 Yamaha TZR250 (liquid-cooled, 2-stroke, 249cc engine)
• Original OEM factory specifications (P/N 2MA-28197-80)
• 9 comprehensive chapters detailing clearances, electrical diagrams, and system layouts

Document Scope and Structure

Getting a classic 2-stroke back on the road requires accurate data. This 1987 Yamaha TZR250 service manual outlines the exact factory-recommended maintenance, engine overhaul, and chassis adjustment protocols used by dealership technicians. At 333 pages, it covers the bike from the ground up. Because the file is an instant download, you can pull the PDF up on your bench tablet right now and get straight to work. The opening sections define critical vehicle identification and required special service tools. From there, the guide dives deep into periodic maintenance, engine disassembly, cooling system routing, carburetor synchronization, and troubleshooting the electrical and Y.P.V.S. setups.

Specifications and Technical References

Precision matters when rebuilding the 2MA-series block. Technical reference tables provide the exact numbers you need, including the 0.050–0.055 mm piston-to-cylinder clearance and 0.03 mm crankshaft runout limits. Fluid capacities are clearly mapped out, specifying 1.4 liters for the autolube tank and 1.35 liters for the cooling system. Before starting any major teardown, always review the documented torque sequences and handling precautions to prevent component damage or personal injury.

You will find comprehensive torque values for major assemblies, such as cylinder head nuts (22 Nm) and crankcase flange bolts (24 Nm). For electrical diagnostics, the manual lists the magneto pick-up coil resistance at 94–140 ohms (at 20°C). It also provides high-resolution wiring diagrams, connector color codes, and cable routing illustrations to help you chase down ignition advance issues quickly.