This is a new, blueprinted Yamaha KT100.  Blueprinting has been performed by Viking Machine owner, and renowned national-level engine builder, Steve Jacobson.

Type: 2-stroke, single cylinder, piston port
Displacement: 97.6cc
Bore x Stroke: 52 x 46 mm
Cooling: Free Air
Starting: Auxiliary
Dry Weight: 21 lb
Lubrication: premix, 20:1, Yamalube 2R
Carburetor: Walboro WB-3A
Ignition: TCI
Drive: PTO, for clutch or direct drive
Clutch: not included
Transmission: N/A