Its made by Suzuki. It is said to have the largest piston of any gas motorcycle or car produced to date. Almost 4.5 inches
It comes stock with a 240 rear tire.
Low 11's stock
Very fun ride.
Here's some info, its pretty cool.
http://www.biketestusa.com/Article_Page.aspx?ArticleID=3087
"At 1783cc, the new engine is not the largest, but Suzuki is claiming it to be the most powerful V-Twin in the world. Producing a claimed 127 horsepower at 6200 rpm and 118 lb-ft of torque at 3200 rpm, it has got the Kawasaki Vulcan 2000 and the new Yamaha Roadliner beat by a few, that's for sure. It just doesn't out-torque the Vulcan, although not much does. With the simply massive 112mm pistons blasting up and down their individual 90.5mm strokes, the engine will rev till to 7400 rpm before the limiter shuts things down. Maximum power is quoted at 6200 rpm, but the bike still keeps pulling solidly till 7000 rpm if you need."