This crank case is factory-made reinforced behind
the 3. cylinder to avoid fissuring at the
main-bearing seat.....For all type 1 engines 1300 + 1600 ccm....This brand-new crank case is equipped with 12 mm
main oil gallery and 12 mm thread inserts.
The casting is made of durable AS 41 alloy
(4% aluminium, 1% silicium).
Thus these crank cases are more stable as the
previously sold cases of AS 21 alloy.....Quotation per piece