DIY: Fuel overflow catch tank (Gas catch can)

I'm going to the circuit soon, and they require a catch tank for fuel. In the event that your bike goes down, you don't want it to spill fuel on the track. A fuel catch tank routes the overflow points to one place, preventing spillage. I did the following on my NSR (mc21) but you can follow similar steps for your bike.


Step 1. Find a container
Avoid plastic as gas can eat through it. I got a can of Pocari on a hot day, two birds with one stone!

Pocari Sweat: Tastes better than it sounds

Step 2. Remove gas tank and air box

Step 3. Remove carburetor breather hoses
These should not be connected to anything, as they vent atmospherically.

Step 4. Connect new hoses (3x)
To carburetor breather vents, and gas tank overflow.

New hoses (clear) leading to bottom left of radiator

new hose (clear) from gas tank overflow

Step 5. Drill holes in your catch can and mount. 
I drilled four:
-two for carb breathers
-one for gas tank overflow
-one for venting

mounted to the frame with elastic bands

Step 6. Insert lines 
Feed lines to the bottom of the can

Step 7. Replace airbox and fuel tank

done

COST: ¥980 

• Pocari Sweat ¥120
• Lines ¥400
• Clamps ¥180
• Elastic Band ¥280

It's a relatively simple and cheap job. We'll see how it holds up on the track. I'll post any edits/updates at the top if something could be improved.