Owner`s manual

16
Courage Series
Less reciprocating mass means less force to balance within the
system. That means lower bearing loads and longer engine life.
To accomplish this, the piston was completely redesigned to
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Wider skirt for better heat transfer from the crown
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Skirt is 2 mm longer for a better guide in the bore
Reduced pin diameter from 22 mm to 20 mm
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Old vs. New Piston
Old Style
New Style
The connecting rod went through some
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This means the pin centers are 2 mm
longer and the small end is 2 mm smaller.
The longer connecting rod also helps
reduce secondary reciprocating forces.
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increase the eccentric offset by 1 mm.
That means the weight will now move a full
18 mm to compensate for the lighter moving
parts.
Connecting Rod Detail