Engine question: VALVES?!

RBar · 07-14-2011, 04:53 PM

Websites state that the GZ250 has a TWO VALVE head.
The Service Manual shows what appears to be 3 valve springs, and on the underside, two intakes and two exhausts! Are these pics correct for the GZ250, or are they using a different set of pics for the service manual?

The two exhaust pipes WOULD indicate something different about this single cylinder. "TWIN DOME" combustion chamber might be another clue...
Are the pistons domed? with the spark plug in the center of the combustion chamber, that would make it sorta like a little hemi engine, right?
ANYBODY every had theirs apart?

RBar

07-14-2011, 04:53 PM	#1
RBar Junior Member Join Date: Jul 2011 Location: Dayton, TN Posts: 5	Engine question: VALVES?! Websites state that the GZ250 has a TWO VALVE head. The Service Manual shows what appears to be 3 valve springs, and on the underside, two intakes and two exhausts! Are these pics correct for the GZ250, or are they using a different set of pics for the service manual? The two exhaust pipes WOULD indicate something different about this single cylinder. "TWIN DOME" combustion chamber might be another clue... Are the pistons domed? with the spark plug in the center of the combustion chamber, that would make it sorta like a little hemi engine, right? ANYBODY every had theirs apart? RBar Login or Register to Remove Ads
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