This reminds me of one of my early adventures during college days.
I had a Honda SL175 with a rotten muffler that I couldn't find a replacement exhaust for. In retrospect I should have left ugly alone.
Where the pipes exited under the engine frame, I cut them off and had installed VW Beetle tailpipes. It was the fix that stayed with the bike until I sold it to become someone else's problem. I don't know why I thought they would work, except they are stock on quiet Volkswagen Beetles. Once I had them installed and fired off the bike, I knew I was going to have issues to deal with. . . .
One night late after the bar closings, I turn off the main street and am cruising down the street I live on to go home. I barely had the throttle open due to the noise this thing would generate. As soon as I saw the cop car behind me I knew enough to keep the throttle limited, and when he hit the lights, I shut the bike off and coasted to the side of the road. That probably kept me out of the ticket, but the adventure wasn't over.
The two cops look me, and the bike over, and decide I can drive it home, but not before the one cop notices that "there aren't any mufflers on the bike."
Well, sir, yes there are . . . they are stock units off a Volkswagon Beetle. Flashlights inspect my handiwork.
The first cop says, They don't look like anything but glasspacks.
I say, they are what come on the back of VW bugs. It's the part of the muffler you see when you are behind them.
The second cop says, They're mufflers. lets go.
I fiddled with things and just could not get the bike started for some reason to drive it home until they drove off. I would have pushed it home the last three blocks if I had had to.