Re:AIS removal and crank case vent questions???
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TOPIC: Re:AIS removal and crank case vent questions???
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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JimH wrote:
brianmac wrote:
i dont want more chrome to corrode, anybody got a part # for a filter to hang under the bike that can be cleaned and refitted?
I bought a small multi purpose filter from O'rielly,cost $10 bucks,ran it down below.I remove it once a year and clean it with the K&N cleaner and reinstall...works great,doesn't have time to get plugged up.
How nasty is it after a year? I am under the impression that not too much volume is moved thru it as one piston is going up while the other is going down.... 
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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I thought they are on the same crank pin with 45° offset so they go up and down relatively together
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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brianmac wrote:
I thought they are on the same crank pin with 45° offset so they go up and down relatively together
Your right! In that case there is some volume changing...... 
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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brianmac wrote:
I thought they are on the same crank pin with 45° offset so they go up and down relatively together
Yamaha's Road Star is 48°, but you're right. A lot of chuffing going on.
Typical single pin throw V twin.
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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Pretty cool animation. I like it!!
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Peace,
Baron Wilhelm Gustav von Schmidtt III
(but you can call me Joe)
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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Flashback wrote:
JimH wrote:
brianmac wrote:
i dont want more chrome to corrode, anybody got a part # for a filter to hang under the bike that can be cleaned and refitted?
I bought a small multi purpose filter from O'rielly,cost $10 bucks,ran it down below.I remove it once a year and clean it with the K&N cleaner and reinstall...works great,doesn't have time to get plugged up.
How nasty is it after a year? I am under the impression that not too much volume is moved thru it as one piston is going up while the other is going down....
River posted a pic a few years ago, of his Crankcase vent set up. He used a glass sided filter, and the crud in it, was interesting. It was basically the same icky looking crap you get when theres moisture in the oil. He mounted his on one of the front down tubes, so it was mostly down hill. The filter allowed it to accumulate.
I think the harder you ride the bike, to more blow by you'll get.
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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Well, I have had my vent extended down to the rear along with the gas tank vent for years, never get any oil drips off it but I may put a filter on it now..I can't see how the duck valve would work, wouldn't it prevent the air movement from going in?
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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The crankcase has got to breathe, otherwise pressures and vacuum will play havoc on seals.
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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When you put your hand over the end of the crankcase breather hose all you feel is the air coming out of the crankcase.
The air getting sucked into the engine comes in through the carb air filter and that should have a filter on it.
That great illustration that shows the moving parts does not have a crankcase tube shown.
Trapped air under the pistons is what goes OUT of the crank case. |
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Last Edit: 2015/12/30 12:26 By LuckyDon.
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Re:AIS removal and crank case vent questions??? 2 Years, 1 Month ago
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When you put your hand over the end of the crankcase breather hose all you feel is the air coming out of the crankcase
Actually, it's going both ways. Hold a piece of paper up next to it next time you have the hose off and you'll se it getting sucked in, as well.
So, where does the air come from to replace the expelled volume in the crankcase when the pistons are traveling up the cylinder walls? Blow-by contributes very little, unless the rings are shot.
The crankcase vent is a two way street.
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Last Edit: 2015/12/30 12:58 By BikerRon.
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