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Hi guys, in the UK community we are having some issues with clarifying engine timings.
In one universal manual it dictates the F indicates TDC, on another the T dictates TDC, when I've had my head off I'm sure F was definitely TDC.
So we need a breakdown of what really means what for personal use.
Also Can anyone explain what the || lines mean.
Also you have two lines on the camshaft wheel, they are inline with each other, one line has an F, any clarification of these.
Kind regards,
Alex
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T is the TDC mark. F is the ignition timing mark (spark advance 22 degrees +/-2 degrees, which is on about 22 degrees BTDC). Some do not have the F mark in flywheel, but there's a line in front of T , which is F, but not marked.
In fact, know the location of the top dead point T is most important, the ignition timing point F can be inferred from the flywheel to determine the direction of rotation only,, T of the top dead center in front of the mark is F ignition timing marks. Acting in a four-stroke engine cycle at twice the piston top dead center position, the ignition timing can be adjusted at any time on the dead center position, the spark plug at the two dead center position are angry, an effective (the power stroke), one invalid (exhaust stroke), that time is the power stroke is that when adjusting the ignition timing for the ignition timing. Ignition time is T or F-point mark only the ignition timing marks on it? Of course is F. BTDC spark plug engine efficiency that is the highest point of 22 ° F. On T engine can be started, with particular attention to one kilometer motorcycle engine will be very hot, the efficiency decreased significantly. There is another situation that does not rule out some of the engine when the factory had been designed in the T position 22 degrees before top dead center, which is perhaps the reason for some of the engine is not F, and if so, of course, is on T. In either case the valve timing is the same, to find the valve timing mark on the ignition timing everything OK. It varies , please refer to each case .
From http://zhidao.baidu.com/question/385477203.html Chrome auto-translate + some human correction