taco eater :
Chris M from Pasadena, MD United States
I did at first. I told myself "you don't need a pipe that big, just do a circuit pipe". and I bought one. setup on a 50cc airsal t6, case matched, and it was "fun" and torquey, but hit a wall right at 8k, and wasn't as entertaining as the blaster pipe you think of. I ended up buying this, installing it, spacing the cylinder up with a 1.75mm base spacer, and letting it rip. even with a junky 15.15, this thing hits like a sack of bricks at 8500rpm and keeps climbing into the 11k range. it's an absolute blast. don't even bother. make it a ripper, it's what you truly desire.
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Rips
June 22, 2017
taco eater :
Sarah Baskin from Lake Saint Louis, MO United States
Put this pipe on a stockish Moby with a 15 Dellorto and it is a ripper. You are just going to need to port the stock exhaust port to run this monster.
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a classic powerhouse
December 5, 2016
taco eater :
rodney from san francisco
this thing hits, ive mostly used them on different bikes, non-french, like puch gilardoni and derbi, and it will PULL. the shape of the chamber and size of the cones is perfect, and its awesome to see what you can fit this pipe on. does work really well on a french ripper bike, ive ridden a few, if youre ready to get rid of pedals though!
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Dumb
June 4, 2013
taco eater :
Aaron Fogg from Memphis, TN United States
Heavy pipe and quality built. Hangs too low. Makes turning left awesome. Very high RPM blaster.
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bye bye silencer
April 9, 2010
taco eater :
seniorita from Ann Arbor MI United States
Of course the doppler rocks. Except the silencer breaks off. Then it is welded back on, and breaks off again.
So it goes with moped parts in general. Still a rocking pipe!
Don't bother using anything else. 
Dumb