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EMISSIONS CONTROL SYSTEMS
EVAP/ Crankcase Emissions Control System
The Cleveland CycleWerks motorcycle is equipped with an evaporative emissions control
system (EVAP) to prevent fuel and oil vapors from escaping into the atmosphere and
polluting the environment. Fuel vapors evaporating in the fuel tank and oil vapors from the
crankcase are collected in the charcoal canister when the motorcycle is not being ridden.
The vapors in the fuel tank are vented through the vent hose into the canister. During
normal operation of the motorcycle, vacuum from the intake manifold opens a diaphragm
valve to allow engine vacuum to purge the vapors collected in the canister to be burned in
the engine.
Combustion blow by and oil vapors generated in the crankcase during engine operation
are directed into the air box and therefore burned in the engine.