Detailed explaination of the air box, please.

Scooterspal · Post by **Scooterspal** » Tue Jun 10, 2008 4:43 pm

Can someone explain to me why air box and filter are so critical to the operation of the Spree?

Why is it important the box be tightly closed so air only comes in the port
at the back?

Why does the foam filter have to be soaked in motor oil to work.

Why, if the hose comes off the air box, will the engine self destruct, if that is what will happen?

Excuse me if this is already covered here. I just cannot seem to find it.

Thanks!

CharlotteSpreeRider · Post by **CharlotteSpreeRider** » Tue Jun 10, 2008 4:59 pm

It's covered over and over again. The airbox, oiled filter, and tightly fitting airbox lid are designed to greatly restrict air flow through the carb and motor. If you derestrict it, you are allowing air to flow much easier. That may sound like a good thing, but it actually causes the gas/air mixture to be too lean (too much air, not enough gas) for the design of the motor. Running these motors lean is a very good and fast way to seizing (permanently or semi-permanently destroying) the motor.

-aseigler

Scooterspal · Post by **Scooterspal** » Tue Jun 10, 2008 5:19 pm

OK... I see. Mine came with the filter bone dry. I have since soaked it in 30 weight oil and replaced it.

Does the oil do anything other than attract dirt? Does it affect the operation in some other way.... the oil fumes I mean?

CharlotteSpreeRider · Post by **CharlotteSpreeRider** » Tue Jun 10, 2008 5:21 pm

It attracts dirt and even further restricts airflow -- that's all.

-aseigler

Kenny_McCormic · Post by **Kenny_McCormic** » Tue Jun 10, 2008 8:04 pm

Its just for dirt grabbing. Because the engine was sort of built around its airbox they dont do well with a different filter no matter what you do.

Cubey · Post by **Cubey** » Tue Jun 10, 2008 11:06 pm

Scooterspal wrote:OK... I see. Mine came with the filter bone dry. I have since soaked it in 30 weight oil and replaced it.

Does the oil do anything other than attract dirt? Does it affect the operation in some other way.... the oil fumes I mean?

Hmm... my filter was dry when I popped off the airbox lid. The seller said he put a new airbox (and filter i guess, it looked new) so I guess he didn't know to soak it. Will have to do that soon I guess.

CharlotteSpreeRider · Tue Jun 10, 2008 11:34 pm

It's just a sponge. You pour some oil on it (the manual actually says to use 80/90 gear oil), then you squeeze the oil all around so it's not all in one spot, then you squeeze out the excess that would otherwise just drip out, then you put the filter in and seal the box. That's all there is to it.

-aseigler