Hey I'm buying a Yoshimura exhaust that's for a 2006 f4i. I need to get a bolt to block of the o2 sensor port. From what I found online o2 sensors are 18mmx1.5 thread. Now that size is for a car. Are Bike o2 sensors the same size? Do you think homedepot will carry that size?

 

all 02 sensors are the same size. Just by a innovate LC1 wideband 02 kit and then you can tune your bike.

 

If you can't find a bolt anywhere with right thread pattern, go to Autozone and get set of defoulers (I think that's what they call them). You screw them into sparkplug holes of high mileage vehicles then screw sparkplugs into them. They are supposed to cut down on oil burning. Anyways, they are same thread pattern. You can simply weld one shut and screw it in to block the hole.

 

i used thread sealer and a bolt