Why in god's name do you need a 16t front sprocket? Are you riding asphault? That's gonna make your bike a pig, unless you get a bigger rear sprocket too. Kickstarter, go to a local hardware store, and get an oversized o-ring for $0.99. Takes care of it. Clutch cover gasket, take it off, clean it with some Brakleen, and put it back on. Make sure the bolts are good and tight, but don't over tighten them. Hope that helps.