Cylinder and cylinder head are looking comparable, but it is a different engine (Bore & Stroke: 72mm x 61.2mm).
You'll see it on the detail pic's:
SSR Motorsports XF250 Enduro Bike
Saw this on Craigslist. SSR 250cc Enduro Dirt Bike
Suped up t dub?
Nice bikes but they have little (if anything) in common with the TW
The difference between
Ordeal and Adventure