so i take m mc21 out today and it just seemed out o tune then when i get to 10000 rpm it flat lined straight away i thought dam power valves i only just adjusted them last week so thought i may have forgot to tighten the lock nuts but when i check them its all good so i then check the alignment marks and find the servo is not moving at all at any condition so i switch her off and move the servo by hand then start her up and the servo returns and starts working normal again all adjustment is still correct so i thrash it for most of the morning and it runs fine .
then after a quick feed and piss stop of about half hour i fire her up and as soon as i hit band in first i can tell the power valves are not working again.
has anyone seen this before or got any ideas why it would cut out intermitantly like that
cheers for the help
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"Batmans a scientist"