Checking The Head - APRILIA M192M Workshop Manual

ENGINE
3.6.22.

CHECKING THE HEAD

•
Using a ground bar and a feeler gauge, check that the
head surface is not worn or out of shape.
Max. misalignment allowed: 0.05 mm
•
Check camshaft and rocker arm shaft thrust surfaces
for wear.
•
Check head cover, intake manifold and exhaust mani-
fold surfaces for wear.
A
B
C (Engines M192M / M245M /
M281M / M234M / M282M)
(125 - 200 cc)
C (Engine M191M) (150 cc)
3 - 104
Engines M192M / M191M / M245M / M234M / M282M / M281M
Standard diameter
∅ 12.000 ÷ 12.018
∅ 20.000 ÷ 20.021
∅ 37.000 ÷ 37.025
∅ 32.500 ÷ 32.525