Hello, I recently took off my stock air box for a UNI filter and I have a hose sticking out that was stuck in the airbox. I'm guessing this is the crankcase breather. What should I do with it? Plug it or leave it? Also does this affect how my ped runs?
For most of us, it's been so long since we've even seen an airbox that we can't remember what vents where. Both the carb and the transmission have vents. Keeping water out of the gearcase while allowing for thermal pressure release was the reason for the line from out back. You can leave it poking up to the sky or artfully route it downward.
The carb has a couple of vents too. EPA probably required them to route to the airbox for re-breathing in a vain attempt to decrease by some fraction the Hydrocarbons liberated from these dirty little 'Smokers. Lots of riders keep a length of line attached to the carb vents to prevent water entry in the event of a really wet ride. Many just pull the lines off and Proudly Pollute.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH