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duke 390 modified stock muffler ?

49K views 45 replies 22 participants last post by  390DukeBraaap1  
Hi Johann,

Any updates on fitting your SuperTrapp ?
 
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I ended up buying a stock exhaust for peanuts from a guy who'd ditched it for an aftermarket one. The plan is to use it for experiments to see if anything can be done to improve the tone while making the least changes to the existing design, but life is getting in the way of being able to spend much time on it.

I have done some exploratory keyhole surgery already to see what the innards really look like & have some ideas to try... just need the time to do them.
 
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Howdy,

No update from my experiments. Life is getting in the way of fun stuff at the moment....
 
Funilly enough... yes ! Waxed once, washed, vacuumed & interior detail twice. Am I a clean-freak or what !:) And then there's the 3D Printer.....
 
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Nope, but I would do the same thing !
 
That ground-breaking experiment & video was made by ex-forum member Rick D. He sold his 390 shortly after for a Yamaha MT-07 & we haven't heard much from him since.