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Coming from a background of 2-stroke tuning, I have developed a healthy paranoia of heat seizing. Often when "hotting up' a vintage scooter i would install a CHT Gauge at least for the duration of settign up the carb.
Is it something people do with twin 4-strokes? To be honest the engine is so noisy (and the pipes) that I don't know what to listen out for in the traditional way.
Also are plug chops effective on these things?

derek
 

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Coming from a background of 2-stroke tuning, I have developed a healthy paranoia of heat seizing. Often when "hotting up' a vintage scooter i would install a CHT Gauge at least for the duration of settign up the carb.
Is it something people do with twin 4-strokes? To be honest the engine is so noisy (and the pipes) that I don't know what to listen out for in the traditional way.
Also are plug chops effective on these things?

derek
Derek,

Heat seizing of a four stroke can happen but the mixture of the
fuel would have to be very lean I do not think it would run above
idle very well. Heat seizing for two stokes usually worked down
to the fact of oil, or the lack of oil to be exact. Remember that
in these engines oil is also a cooling medium.
So on a four stroke start with a rich mixture and work your
way back to the leaner end of the spectum. Sooty plugs are
an easy fix. Melted piston not so much.

Pookybear
 
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