4 stroking at 0 throttle-1/4 throttle

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GearNut

GearNut

Active Member
Aug 19, 2009
5,104
11
38
San Diego, Kaliforgnia
The gas tank has to be vented.
As the gas exits the tank air must be allowed to enter the tank to displace the volume of fuel that has exited the tank. Without a vent the tank will only develop a vacuum inside of it and the gas will no longer flow out.
This is the same principal as holding your finger over a straw to hold a beverage inside of it.
The beverage stays inside the straw until you vent it.
 
Goat Herder

Goat Herder

Gutter Rider
Apr 28, 2008
6,237
20
38
N.M.
Gearnut's senerio plays in with pressure building up in a tank on a hot summer day and venting into the carb as well too.
 
mapbike

mapbike

Well-Known Member
Mar 14, 2010
5,502
109
63
Central Area of Texas
fischer550 said:
Gotcha, except if stock tanks are not vented, why does mine have to be?
Click to expand...
Remember you're dealing with chinese products here..... not doing the little things is how they're able to sell stuff cheap, they rarely send things over here that have all the I's dotted and the T's crossed.

Map
 
Last edited:
mapbike

mapbike

Well-Known Member
Mar 14, 2010
5,502
109
63
Central Area of Texas
GearNut said:
The gas tank has to be vented.
As the gas exits the tank air must be allowed to enter the tank to displace the volume of fuel that has exited the tank. Without a vent the tank will only develop a vacuum inside of it and the gas will no longer flow out.
This is the same principal as holding your finger over a straw to hold a beverage inside of it.
The beverage stays inside the straw until you vent it.
Click to expand...

Excellent explanation GearNut...

Map
 
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