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27 Aug 2014
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Sohc or ohc ?
Hello hubbers,
On a single cylinder motorbike engine is ohc and sohc actualy the same?
Ifnot what is the difference for a single cylinder engine.
There is a lot of info on this on car engines with more than one cylinder.
Thanks for your help!
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27 Aug 2014
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An ohc (overhead cam) engine could be either sohc (single ohc) or double ohc. There are a few oddball tohc (triple ohc) bike engines but to the best of my knowledge none of them are singles.
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27 Aug 2014
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thanks for your answer,
So if the single cylinder isnt a Dohc,it is a Sohc with is the same as a Ohc (on a single cylinder)if i understand it correctly.
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27 Aug 2014
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To call a single cylinder engine ohc it must have either one or two cams located above the valves. There are alternative possible locations for the cams - either in the crankcase or in a few cases halfway between the crankcase and the head.
Usually if you read that an engine is OHC it means single cam. The marketing people don't miss a trick and if it's got twin cams they'll let you know - it'll be stickered as DOHC or Twin Cam.
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27 Aug 2014
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totaly clear now!!
many thanks for explaining it
I asked this question because there are a few single cylinder engines of honda saying "ohc"
while other brand with a also single cylinder engenines marked there as "sohc".
Saludos and thanks BofB!
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27 Aug 2014
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So if the engine is laid down a la Moto Guzzi or Ducati single would it then be a SAOTHC (Single ahead of the head cam)? ;-)
Andy
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