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having a brain fade, quick question

555 Views 5 Replies 3 Participants Last post by  Jason
when the tach is showing RPM's, is that the actuail number of times that the crank turns 360 degrees, or is it it the number of times/minute that the #1 cylinder is fireing?
sorry for the newbie question, but my brain isn't working at the moment. :wall:
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Crank revolutions per minute

On 2005-11-30 13:18, Mr Joe wrote:
Crank revolutions per minute


so in that case, if the tach is reading, lets say, 5000RPM, the #1 cylinder is fireing 2500 times per minute?
If the plugs are good :D:

that's what I thought, but for some reason I was thinking it was something diffirent.
Wouldn't it be 1250 times per minute?

5000 rpms's
4 strokes
1250 times per minute

Edit: Nevermind. 2 strokes = 1 revolution. Carry on.
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