Bonneville America Forums Forums Technical Forums Performance Mods AI - airbox- rubber plug question

When I bought my 03 Speedmaster last year it already had the AI revoval kit installed. The bike has performed really well since I have owned it with only an occational pop on decel. I am running BUB pipes on it.

Today I happen to be checking my (stock located) K&N filter and my airbox and I had the LEFT side chrome faux cover and the other black plastic cover off. I noticed an open hole at the outside top of the airbox where I'm guessing the (AI removal kit) large rubber plug should be.

I don't know if the previous owner just omitted it to get more air through the carbs and made adjustments acordingly or if at some point it just fell out. Either way, the bike still runs good and I am hesitant to mess with it.

I am just worried about dirt and junk being drawn into the engine through the open hole. I was thinking of attaching some sort of screen over it or just installing another plug to see what happens.

Anyone else running without the AI rubber plug in the airbox?

I'd put a plug there since it's on the intake side of the air filter and be done with it.

That hole is on the clean air side of the filter, so you really need to plug it.My guess is the previous owner either lost the plug or just forgot to install it.

Duct tape.

Thanks much for the advise.

I'm going to put a new plug in there.
Don't like the thought of having to buy the whole AI kit just for one plug though. Maybe I can find one in an auto parts store that will fit.

Hardware store has plugs that will work. goob some silcone there too would work , but, be sure to let it cure before you run the engine. That is on the carb side of the intake circuit so it will allow any dirt drawn in there right in the engine.