The four vent tubes – it’s normal for a small amount of gas or oil to leak out. How to prevent problems: 1) Don’t over-fill gas tank. Fill only up to the lower edge of filler neck. 2) Don’t over-fill oil. When adding oil, give it time to run down before checking. 3) Parking in the sun makes it worse. For some people, this only happens when they park in the sun.
The four tubes from right to left: 1) large – ________, 2) large – gas tank vent, 3) small – _______ , 4) large, clear tubing – crankcase breather
CRANKCASE BREATHER – remove cap and clean out hose every 4,000 miles
you have 4 hoses
1. crankcase breather drain – has a cap on it so can’t leak anything. When you see the tube has some sludge in it take the cap off to drain it
2. radiator reserve tank overflow – if you have the tank filled to the proper level, you will not get any coolant drainage out of that hose
3. fuel tank drain hose – only time gas will come down this hose is if you have the gas cap open and you are filling your tank and over fill so that it gurgles up the filler neck (blue arrow) and spills into cavity (green arrow) draining down the hose connected to drain (red arrow) to the ground.
4. fuel tank breather hose – only time gas will come down this hose is if you fill tank above the recommended level stated in your owner’s manual and the gas cap is closed. Being the tank is overfilled there is no room for the gas to expand and as the gas warms it will be forced down the breather hose. When the cap is closed the 2 black arrows form a seal…the expanding gas goes up through center of cap, through the sealed joint and down the breather hose to the ground. If your bike had an evap can it would drain in there.
If you DON’T see something dripping from one of the hoses, then another option is to look at is the water pump weep hole. The water pump is located up on that side and if it was weeping it would put a spot on the ground just like the spots in your picture. See photo:
Rebel500 