Hi joejBSA, Can you tell what kind of oil? Smell like gear box or motor oil?
Should you choose to diagnose, spray into front sprocket area with garden hose, spray nozzle attached. Let dry a day or two. If possible use a spare chain as this tends to rust chain. Look into area from below & from rear sprocket area looking forwards. Mirrors can be helpful. Make sure it's dry. Go on short road test like 3 blocks. See if you can see where oil is from. Extend road tests as needed.
There are 3 seals & the sprocket door gasket & its screws, plus splines of trans sprocket. Seal in sprocket door. Seal in tip of 5th gear snout near sprocket nut. Sprocket splines. Later sprocket/5th gear uses oring here. The sprocket seal itself. All can/will leak.
Unlikely motor is wet sumping. Road test bike at least 10-15 miles. Bring into garage, put on center stand. Remove primary oil filler plug. Using 1/4" dowel, rod or screwdriver, reach down behind chain & find bottom of primary case. Very easy to do. Oil will be about 1/2" on your makeshift "dip stick".
If motor sump is overfilling or the like, the primary oil will be too high. Way high like 1-2".
DO NOT put bike on center stand at all with motor running or it will add oil to primary very quickly. It just does.... Takes 10-20 miles to pump it back to frame. Of course this wouldn't normally matter. I put bike on side stand motor running often for quick restroom break. But.... you don't want to do that to test primary oil level.
The 2 small seals are the same part#. pretty easy to change. Pull seal from 5th gear using bent wire hook. Usually not tight. Sprocket seal can be a stinker. Very hard to pull. Tight going back in. Put sealant on sprocket splines, even if it has o-ring, they like to leak.
Several thousand miles ago I replace trans sprocket seal & the others. Factory had loctite on splines.... Worked good. I used silicon. Worked bad. Soon starting leaking from splines. I'd not thought it could pass that much oil by splines, but it sure did.