1980 YAMAHA DRIFTER SA340 SB440 SNOWMOBILE SERVICE MANUAL

Description

1980 YAMAHA DRIFTER SA340 SB440 SNOWMOBILE SERVICE MANUAL – PDF DOWNLOAD

Customer Support: [email protected]

Image Preview:

Description:

1980 YAMAHA DRIFTER SA340 SB440 SNOWMOBILE SERVICE MANUAL – PDF DOWNLOAD

• All internal combustion engines are characterized by a four part cycle of operation. The four parts are: 1. Intake, 2. Compression. 3. Combustion. and 4. Exhaust. A fuel/air mixture must be drawn into the engine, compressed, burned, and exhausted.
• A two-stroke engine uses only two strokes to ac• complish all four parts. Each of the four parts can be easily understood by following the path of the fuel/air mixture through the engine. (See Figure 2-1.) 1 . Intake: On the upstroke of the piston a charge of fuel mixed with air is drawn into the engine through an open port in the cylinder. 2. Compression: Near the bottom of the downstroke, the intake port is closed, and the piston starts back up. This upstroke compresses the fuel/air mixture to a fraction of its former volume. 0 0 0 0 3 .
• Combustion: When the mixture has been compressed, it is ignited and forces the piston down. This is called the power stroke. 4. Exhaust: After the power stroke, the burned gases exit through the now open exhaust port, and the cycle is ready to start again. The piston is catried through each step from one power stroke to the next by the rotating inertia of the crankshaft.
• The intake of a two-stroke engine is perhaps the most complex part of the cycle. After the fuel and air have been mixed in the carburetor, it is drawn into the crankcase. As the piston rises, a hole in the cylinder wall (the intake port) is uncovered by the lower edge of the piston. The rising piston effectively increases the volume of the crankcase, drawing in the mixture.
• On its return trip, the piston blocks the intake port and lightly compresses the mixture in the crankcase. At about 55° -600 BBDC (before bottom dead center), the upper edge of the piston uncovers ports in the cylinder wall that are connected to the crankcase. The mixture in the crankcase, under pressure, rushes through these transfer ports into the cyliner

Table Of Contents:

1980 YAMAHA DRIFTER SA340 SB440 SNOWMOBILE SERVICE MANUAL – PDF DOWNLOAD

General Specifications . . . . . . . . . . . . . . . . . . . . . 1·2
Service Specifications . . . . . . . . . . . . . . . . . . . . . 1-5
Torque Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Gear Ratio Chart . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Port Dimensions ……………………. 1-11
Engine Performance Curves . . . . . . . . . . . . . . . . . 1-12

Please Note:

• This is the same manual used by the DEALERSHIPS to SERVICE your vehicle.
• The manual can be all yours – Once payment is complete, you will be taken to the download page from where you can download the manual. All in 2-5 minutes time!!
• Need any other service / repair / parts manual, please feel free to contact us at heydownloadss @gmail.com . We may surprise you with a nice offer

sk