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Yamaha F400A 2022 - Sleeveless Cylinder; Heat Exhaust Fan and Heat Vent

Yamaha F400A 2022
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2-5
Power unit
Sleeveless cylinder
The newly designed cylinder block has adopted spray-coated cylinders instead of sleeved cylinders.
By using spray-coated cylinders, the weight of the cylinder block is decreased, cooling performance
is increased, and so on.
The inner walls of the cylinders are spray-coated using metal powder.
Heat exhaust fan and heat vent
The flywheel is equipped with a heat exhaust fan and the top cowling is equipped with a heat vent.
By controlling the temperature increase in the top cowling due to the generation of a large amount of
electricity and stabilizing the intake air temperature, high output can be produced.
In addition, the heat vent is located on the front of the top cowling to prevent water from entering the
cowling.
A
A. Warm air flow

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