bigjake
Scoot Junior
Im here for discussion for modding. Im not fast never will be but will always strive for more power.
Posts: 8 
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Post by bigjake on Oct 24, 2018 6:19:41 GMT -5
So I stay up too late and order cheap things without too much throught some times and I got an Ebay baffle can the other day.
So the can has an adaptor for the oil dipstick but what to do with the valve cover vent? Should/can you just cap it. On cars you usually have the valve cover and crank case and you want to vent both. On the 139qmb can you just vent one and not cause pressure in the valve cover.
Also I dont need reasons why pcv is important, I run this scooter hard and want an open system for the crank case.
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lupo76
Scoot Enthusiast
Posts: 157
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Post by lupo76 on Oct 24, 2018 8:56:43 GMT -5
The valve cover is already vented. Nothing to worry about there  And there is really no need on a stock engine to vent crankcase, but I recommend to do so with a bbk though. |
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bigjake
Scoot Junior
Im here for discussion for modding. Im not fast never will be but will always strive for more power.
Posts: 8
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Post by bigjake on Oct 24, 2018 14:48:24 GMT -5
Still new to scooters and not sure what a "bbk" is. I know the valve cover is vented but my question is can I cap it or should I splice it into the baffle tube? I know stock engines dont really need venting but this scoot already has a few mods and only more to come. Most likley scrappy dogs big bore and racing head after everything elce is done.
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bigjake
Scoot Junior
Im here for discussion for modding. Im not fast never will be but will always strive for more power.
Posts: 8
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Post by bigjake on Oct 24, 2018 14:50:57 GMT -5
Lol never mind bbk = big bore kit.
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Post by RnDmoto on Nov 8, 2018 14:42:52 GMT -5
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Post by FrankenMech on Dec 13, 2018 4:30:04 GMT -5
The crankcase will vent out through the cam chain gallery to the valve cover vent then to atmosphere. The oil mist will condense out inside the engine unless there is excessive blowby past the rings. The valve cover vent is usually vented back into the carb intake.
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