Hello the exhaust still has the original Yamaha spark arrestor/Muffler which the pipe starts about half way under the seat the rest is the expansion chamber ,which starts from the cylinder barrel to the muffler i was going to replace the muffler with a smaller can type but i have the bike up for sale on ebay at the moment ..
nice bike
400yamahaDT 1 year ago
that is not a factory expansion chamber, who made it for you??? sounds great! i need one for my 77 dt 400
350guy19 1 year ago
Hello the exhaust still has the original Yamaha spark arrestor/Muffler which the pipe starts about half way under the seat the rest is the expansion chamber ,which starts from the cylinder barrel to the muffler i was going to replace the muffler with a smaller can type but i have the bike up for sale on ebay at the moment ..
TheSpi700 2 years ago
Nice exhaust, is it completly replaced or only the part on top of the cilinder?
huub1huub1 2 years ago