Transfer - BOMBARDIER 1996 Ski-doo MX Z440 Handbook

TRANSFER

, F01D6WS
1. Fresh charge fortheother cylinder
2. Fresh charge
3. Intake port covered
Near the bottom of the downward stroke, the transfer ports are uncovered by the piston, and the
compressed air /fuel mixture in the crankcase rushes into the combustion chamber. Piston dome
and combustion chamber configuration and muffler back pressures prevent fresh charge (air /fuel
mixture) from escaping through the exhaust port. This also assists in clearing the combustion
chamber of all burnt gases.
A worm gear is located in the crankcase halves between the two (2) cylinder bases. It transmits
crankshaft rotation to the 90° angled rotary valve shaft.
The helical gear mounted on the rotary valve shaft uses the crankshaft as a power source. To
prevent overheating, the gears rest in an oil bath.
Section
K
I II Ill Ill 111A
ENGINE PREPARATION
04
3
04-31