O.S.Engines B2104 Off-Road

The more popular one of the B2103 models is the Type R. This engine has a high cooling head, 5 | 3 port cylinder liner and the 22E carburettor. Due to its larger amount of ports it has slightly more power on mid range and high end. The 22E carburettor is based on the O.S. Speed 21J carburettor that has been proven as the best option for years. This carburettor is very easy to tune and produces a very linear power curve. The high cooling head produces good cooling and the engine keeps very stable temperature even on hotter days. The Type R is our teams number one choice for Finnish Off-Road tracks.

We offer our clients the possibility to buy the engine with a special front bearing used by all of our team drivers. This bearing lasts double the amount compared to the original O.S. Speed front bearing and has much better concitency of the idle.