New loop header, mikuni carb all tuned up and 670cc predator loving the cold air, built motor, ported billet carb adapter, ported intake manifold, ported heads, 507 cam, heavy push rods, heavy duty springs and billet rods, mikuni swap on a 22 pro @Mud-Skipper Mud Motors surface drive with clutch on a 1542 tracker @Mud-Skipper Canada #fyp #duckfyp #mudmotor #predator670 #performance670 #mudskippermotors #surfacedrive