APRILIA M191M, Workshop Manual, Page: 101 / 177

ENGINE
3 - 77
Engines M192M / M191M / M245M / M234M / M282M / M281M
Bearing category Casing category
Bearing inner diameter after
assembly
Assembling possibility
A 1 29.025 ÷ 29.040 mm Original
1
B
2
29.019 ÷ 29.034 mm
29.028 ÷ 29.043 mm
Original and spare
C 2 29.022 ÷ 29.037 mm Original
NOTE Casings for spares are of the same category and are
equipped with bearings of the B (blue) category. Match
crankshaft with two shoulders of category 1 with casing of
category 1 (or cat. 2 with cat.2). A spare casing cannot be
combined with a crankshaft composed of mixed categories.
Crankshaft for spares is equipped with axle shafts belonging
to the same category.
Casing Axle shaft Bearing
CAT.1 CAT.1 B
CAT.2 CAT.2 B
CAT.1 CAT.2 A
CAT.2 CAT.1 C