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SAthump

case vent valve thoughts?

15 posts in this topic

I made a thread that was proof that the breather tube does indeed suck up crap from the outside... Looks interesting as it blocks out dirt, but still not to sure how controlling the pressure results in better ring seal etc....

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For $75? I think there a lot cheaper logical choices....

I would agree! IF that is simply a one way check valve, that's a whole lot more than it needs to be..... A really quick Google search for "plastic check valves" came up with this plastic one for $.72. It's for 3/8" hose, & I have no idea what size our crankcase vent hose is.....

http://www.usplastic.com/catalog/item.aspx?itemid=36843&catid=489

But I would think that a one way vent (again, IF that's what Thumper Racing is selling; I don't believe it actually comes out & says what it is..... :busted: ) isn't really what's called for in this application. Doesn't the crankcase need to be able to vent both ways???? :excuseme: Seems like it'd be better to route the hose to the air box, and put one of those UNI crankcase vent filters on the end.....

Jimmie

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I moved my breather to my airbox and I only spent $7 on the project. What a waste of $75 but hay Im sure there are people that will buy it.

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Interesting. I know several people use the "T" setup with one hose to the air box and the other downward. Would it be a good idea to use two of the cheap plastic one way valves in this type of arrangement. One so it will only draw air in from the air box and the other so it will only exhaust out the bottom line?

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Would it be a good idea to use two of the cheap plastic one way valves in this type of arrangement.

IMO, it's just not needed...I've had the "T" mod with a filter on the airbox end, and thinner tubing for the draining end for years now and have had no issues (with fine dust, sand, mud, or puddles)

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I have also seen people just route the breather tube down behind the head and next to the carb, then hose clamp a little k&n filter to the end.

They have never had any issues...

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I think I will mimic what the Red bikes do and run one end to the intake boot with the other end down behind the motor.

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I have seen a few buddies route their breather tube backwards and put a filter on the end. So I did it. Seems better than the stock setup. what do you guys think?

0401111735a.jpg

0401111734a.jpg

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I think you're gonna have a little filter that'll need to be serviced often, and a puddle of oil on the case underneath it...Hey, you asked...

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I think you're gonna have a little filter that'll need to be serviced often, and a puddle of oil on the case underneath it...Hey, you asked...

Maybe. I might have a little more clean up work, but that's ok... It's better then sucking a mouth full of sand when I ride in the dunes

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Maybe. I might have a little more clean up work, but that's ok... It's better then sucking a mouth full of sand when I ride in the dunes

I agree :cheers:

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Maybe. I might have a little more clean up work, but that's ok... It's better then sucking a mouth full of sand when I ride in the dunes

Also agreed...:cheers:

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