OVERVIEW OF THE B5244S4
Crankshaft, Main
Bearings
Stroke 90.0 mm; forged; weight 21571 grams; connecting rod pins:
Main bearing journals:
Both the upper and lower main bearings are aluminum.
Connecting Rods, Connecting Rod Bearings
•
Center to center length 143 mm; weight 644 grams.
Both the upper and lower bearings are aluminum.
Pistons
Graphite-coated pistons.
Wrist pin diameter/length = 21 mm/57 mm.
Weight 397 grams with piston rings, snap rings and wrist pins.
Weight piston alone 282 grams.
-
Graphite-coated pistons have a play of approximately 0.04 mm between the piston and cylinder
before the graphite coating. The graphite coating is approximately 0.01 mm on either side of the
piston.
The graphite coating wears but never completely disappears; it penetrates the outer
l
ayer of the piston.
65.00 mm.
50.00 mm.
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