Trick New Exhaust Idea

When I was in high school (don't ask) a popular bike was the CL77 or CL72 (305 or 250 Honda Scrambler)...I had a CL72...they had the twin up swept exhaust pipes on the right hand side of the bike. There were baffles in each pipe which were wriggled out out and the mounting holes enlarged for 'cheater baffles'. They were exactly the same principle as pictured and turned with knurled knobs. The were sold at every Honda shop in southern California. Straight pipes for any occasion:)