Hard to say without a picture of that particular area. There is an oil seal there and that could be leaking, but there is also a gasket for the little cover that houses the 2 reversing gears for the kickstarter, that gasket is prone to leaking on a 200x. If it's that gasket that is leaking, some gasket sealer in conjunction with the gasket there will do just fine, you'll need to drain the oil first and clean it up real good though before applying some.
Trikes
1984 Honda 200x, 1984 Honda 200m
Bikes
1995 Honda CR125R, 1985 Honda XL100 (gone), 1982 Kawisaki KZ550 LTD,
2001 Yamaha TT-R 125L, 1983 Honda XL185S (current project), 2001 Suzuki SV650S