I don't know what motor you are talking about....but a YS motor runs no different than any other motor in this aspect....The new 140DZ, for best results, recommends and come with a foam clunk...This helps the motor from getting air in the pickup tube....


But the tank is really built the exact same way as the other motors.....

The older style YS motors use a pressure system....That looks like a Hayes tank.....Replace it at about 100 flights. The constant pressure and release of the YS system will cause it to leak.....The tank will spring a leak on the one of the forward corners and will be tough for you to find.....


Tettra tanks are the best setup for YS motors. They are a little thicker plastic and no stress areas like the little shelf under the stopper on the Hayes tank....


You can get Tettra tanks form Central Hobbies

www.centralhobbies.com


For the 120-140's a 16oz works great if its the newer 140DZ then go for a 20oz tank.....More power eats more fuel!


Troy Newman