I have a 1993 Suzuki lt230, I'm making a diy airbox because i don't feel like buying one and i have the materials. On the top left of the diagram you see number 9, the smaller air boot. It connects to one of the open tubes on the frame of the atv. I would still have all of the small vent lines connecting like normal but would it harm the performance if I didn't add this tube to the frame? Thanks

 

We have the answer you seek on the ATV Connection homepage, here:

https://atvconnection.com/articles/a...eed-this-tube/