"THE CHAMPION ENGINE COMES BACK!".
Following the 110% edition, which is a long-stroke engine introduced a couple of weeks ago, OS Engine is proud to announce O.S. SPEED B21 Ty Tessmann II square stroke engine. Ty II is based on B2101, the 2014 World Champion engine, with 5.8mm carb restrictor, which is his favorite. And the new feature different from the original B2101 is that Ty II has a low-profile head of Ty’s original design, new shape and double height vertical fins compare to the latest model B2102. The Ty II edition comes with a new 90mm longest manifold and a complete muffler lign T-2090SC (combo set, code #1A20A), or engine alone (code #1A209). Available 18 September 2017.