Grand Prix 250
Main Motorcycle: Street Triple R 09'
Join Date: Sep 2010
Location: Los Angeles, CA
Here is the response from, Danmoto.
"i'm sorry to hear that you're not happy with the pipe.
The weld at this point is necessary, as the lower part of the pipe
needs to be under an angle of 5 degree. It's not possible to bend
this, as it's too close to the flange and also too close to the other
bend. The distance between two bends needs to be about 3 times the
pipe diameter, to assure a good material flow without thin spots.Due
to this we cannot fabricate it out of one piece in this pipe size.
The original exhaust has the same curve in the lower end, but due to
the smaller pipe diameter it can be bended out of one piece.
Because we're using a bigger pipe,we need to cut the pipes under and
angle and weld the lower flange on. That's not a repair/modification
of a defective pipe. All pipes have this weld, as you can see on the
pictures in our item descriptions.
I have to agree that this weld on your pipe is not very beautiful. It
was polished down quite a lot and all the "waves" of the weld are gone
and only the few deeper spots are left. Technicaly it's in good
working order, we test all welds for potential leaks.
The pipe passed QC, as this weld is nearly not visible when mounted on
the bike, but i can understand how you feel about it.
To settle this issue i can send you a new pipe which i check before
shipment by myself and i assure you it will have beautiful welds, like
on the cans.
Or if you're not interested in a replacement, please return the items
to us to recieve a full refund inc. shipping."