Regrettably, this is a common problem. You're engine is what we call a "Head Breather" meaning that the crankcase pressure is vented from the heads. And, as per EPA regulations, this vented pressure is directed into the air cleaner to be run through the engine. As the air is coming out of the engine, it brings with it small droplets of oil. These droplets of oil are caught in the air filter and coalesce into larger drops. The drops are then blown out of the air filter cover by the air passing by it as a result of the bike going down the road.
You can reduce this by keeping your air filter housing cleaned regularily. Or, you purchase a kit that will reroute the vented air from the crankcase. The air is vented into the air filter housing through the two large diameter bolts to the front and rear of the air filter. These bolts are hollow.
Good Luck
Steve
Steve,
thanks for the help. i bought this bike new in 2004 but it just started about a year ago. can you tell me where i can get that kit or what it is called?
Depending on how many miles are on the engine, it could be a bit of blowby on them as well. You may can pull the rocker box top and center pieces. There is an umbrella valve in the center piece that sometimes gets brittle from heat. You can try replacing them. Just remove the tanks from your bike, take the six bolts out of the top of the cover and lift the top section and center up. Replace the umbrella exacly like it's in the center section. Note, the bolts holding the rear rocker box cover on can be difficult to get to without special tools.
The kits are available aftermarket from Custom Chrome, Kuryakin, and others.
http://www.customchrome.net/icatalog/spr...
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