Complex sentence: Komsomol had little direct influence on the Communist Party or the government of the Soviet Union, but it played an important role as a mechanism for teaching the values of the CPSU to youngsters.
Split into simpler sentences: Komsomol had little direct influence on the Communist Party, and on the government of the Soviet Union. But Komsomol played an important role as a mechanism for teaching the values of the CPSU to youngsters.