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Everything Dirt Bike
General Dirt Bike
Duck Beak Shaped Drain Valve/Tube?
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<blockquote data-quote="ossagp" data-source="post: 180247" data-attributes="member: 1650"><p>If you go back and look at the way Doug Henry's yz400f was vented into his exhaust (there is lots more to his than a simple open line however) you can see how many of us learned to vent crankcases on v-8's back in the days of carbureted engines. the venting actually took on the form of harnessing the exhaust flow to create some vacuum and reduce pressures in the crankcase even more. this helped save seals and leaks, as well as reducing the pressure in the crankcase that the pistons had to overcome when starting their downward travel, thus reducing some power loss. I don't think any of my times at the strip showed it, but the mental boost was off the charts. </p><p></p><p>It is probably the ultimate in venting your crankcase if you can do it and not over do it, and suck out the oil.</p></blockquote><p></p>
[QUOTE="ossagp, post: 180247, member: 1650"] If you go back and look at the way Doug Henry's yz400f was vented into his exhaust (there is lots more to his than a simple open line however) you can see how many of us learned to vent crankcases on v-8's back in the days of carbureted engines. the venting actually took on the form of harnessing the exhaust flow to create some vacuum and reduce pressures in the crankcase even more. this helped save seals and leaks, as well as reducing the pressure in the crankcase that the pistons had to overcome when starting their downward travel, thus reducing some power loss. I don't think any of my times at the strip showed it, but the mental boost was off the charts. It is probably the ultimate in venting your crankcase if you can do it and not over do it, and suck out the oil. [/QUOTE]
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