PULLEY WITH SEAL Available in 2 sizes. Comes with special seal to crank case. This avoids leaking or getting in of dirt. Black scale. Comnes with mounting instruction (in German). Extra LONG pulley bolt 010 1089 must be used for mounting. ATTENTION: Because of the lower revolution with 146 mm pulley (item no.: 010 1084) it is necessary to install an additional oil cooling.