my stock 07 vlx 600 every now and again weeps/drips oil fron the air filter housing erea, there is a tube/hose that just sits in the filter housing and it looks like it comes from there. i am going to get an owners manuel, aswell as i am planning on doing a max fuel kit. but just in case till i can get the kit or the manuel is this somthing i need to look into? also the old fellow who owned the bike before me said he had it tuned before i picked it up because of that issue.