Models: Yamaha 250 and 350 Twins covering 247cc and 347cc models for 1970 to 1979 has clear instructions and hundreds of photographs to help you perform anything from simple maintenance to basic repairs. Whether you're a beginner or a pro, you can save big with Haynes! Complete coverage for your Yamaha 250 and 350 Twins covering 247cc and 347cc models for 1970 to 1979: --Routine Maintenance --Tune-up procedures --Engine, clutch and transmission repair --Cooling system --Fuel and exhaust --Emissions control --Ignition and electrical systems --Brakes, wheels and tires --Steering, suspension and final drive --Frame and bodywork --Wiring diagrams. English Workshop Manual.