Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > M620 & u/seat exhaust

[skidlids]

Ron's Monster was the earlier type with the suspension loop, the 620 setup which is pretty much the same as 748/916 749/999 with its tie rod leaves even less room to get the pipework through, you would need to run it around the side like the 749/999 but the double sided arm isn't designed for it.

My can is a Harris can made for the stsyems they used on the GSXR750s they ran in World Superbike. The can itself is about 16" long.

Around 1996/97 the Noise regs changed to there current level of 105dB, one year everybody was using 14" cans the next they had all grown a couple of Inches. So getting a free flowing can to meet 105dB and getting the size down to 10" probably isn't going to happen. Reducing the diameter with a baffle will reduce the noise as it reduces the Gas flow.
Using a baffle for sound testing and then removing it for racing is basically cheating. When others are using a bike with a exhaust that restricts the noise level to 105dB it also has implications on the power available, so anybody using a free'r flowing exhaust making more than 105dB is not playing by the same rule book.