APRILIA M192M Workshop Manual page 137

Engines M192M / M191M / M245M / M234M / M282M / M281M
• Check that the cam and the rubber stop on holding
guard are not worn.
• Check that the automatic valve-lifter, end of travel roller
and counterweight for signs of wear.
• Check that the valve lifter spring has not yielded.
• In case of wear, change the worn parts.
ENGINE
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