Hi. Fuel tap off when bike parked up or leave fuel tap left on ?
When you get old like me , you get home from a ride and you're bursting for a wee,the cat's giving you a bollocking cos it's way past tea time and you're wondering what WTF you did with your wallet, the last thing on your mind is turning off the fuel tap. Even if i did remember to switch it off i'd forget to switch it on again as i spluttered down the road!
Leave on, simple.
Nice simple answer there Colin .. And there generally the best answers!