Checking Valves For Wear - APRILIA M192M Workshop Manual

Engines M192M / M191M / M245M / M234M / M282M / M281M
3.6.23.

CHECKING VALVES FOR WEAR

•
Measure valve seats and valves sealing surface width.
WARNING
Do not change valves assembling position (RH-
LH).
Sealing surface depth (Engines M245M / M281M / M234M /
M282M) (125 - 200 cc):
(L) Standard: Intake and exhaust: 0.99 ÷ 1.27 mm
(L) After use: Intake and exhaust: 1.6 mm
Sealing surface depth (Engines M192M / M191M) (125 - 150
cc):
(L) Intake: 3.1 mm
(L) Exhaust: 3 mm
• In case valve sealing surface is wider that the recom-
mended limit, interrupted in one or more points, or
bent, change valve.
ENGINE
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