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Engine braking
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===Two-stroke engines=== Engine braking in a premix two-stroke engine can be extremely harmful to the engine, because cylinder and piston lubricant is delivered to each cylinder mixed with fuel. Consequently, during engine braking, the engine starves not only of fuel but also lubricant, causing accelerated wear. Many old two-stroke cars ([[Saab Automobile]], [[Wartburg 353]], etc.) had a freewheel device on the transmission to make engine braking optional. Most two-stroke motorcycle engines since the 1970s have had lubrication by an [[oil pump (internal combustion engine)|oil pump]], independent of the throttle and fuel system, such as Suzuki's [[Posi-Force System | Posi-Force]] system.
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