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2002 Buell X1: Engine
3-35
HOME
CRANKCASE BREATHING SYSTEM
3.11
GENERAL
See
Figure 3-52.
On piston downstroke, a mixture of crank-
case air and oil mist is vented up the push rod covers (1)
through an umbrella valve (3) in each middle rocker box sec-
tion.
The oil mist separates from the crankcase air, collects and
passes through a small drain hole (2) where it eventually
returns to the crankcase.
The crankcase air is routed through a passage in each cylin-
der head. The air then travels through each air cleaner
breather bolt (4). Hoses leading from the air cleaner bolts
deposit the air inside the air cleaner’s snorkel.
Figure 3-52. Crankcase Breathing System,
Typical Cylinder
1.
Push Rod Cover (2)
2.
Oil Drain Hole
3.
Umbrella Valve
4.
Breather Bolt
b0143b3x
1
4
2
3
Summary of Contents for 2002 X1
Page 2: ...1 2 2002 Buell X1 Engine Printed July 25 2001 11 21 am ...
Page 22: ......
Page 32: ...1 10 2002 Buell X1 Maintenance HOME NOTES ...
Page 68: ......
Page 152: ...2 84 2002 Buell X1 Chassis HOME NOTES ...
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Page 184: ...3 30 2002 Buell X1 Engine HOME NOTES ...
Page 216: ...3 62 2002 Buell X1 Engine HOME NOTES ...
Page 220: ...4 2 2002 Buell X1 Fuel System HOME NOTES ...
Page 336: ...4 118 2002 Buell X1 Fuel System HOME NOTES ...
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Page 348: ...5 10 2002 Buell X1 Electric Starter HOME NOTES ...
Page 358: ...5 20 2002 Buell X1 Electric Starter HOME NOTES ...
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