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exhaust fitting issues

3.1K views 4 replies 4 participants last post by  losinsnsatnodmnsn  
#1 · (Edited)
after reading through the forums I've come to realize the exhaust pipes on my cb400t are not the stock pipes.

It has a 2-2 system currently, very similar to what is pictured here:
MAC 2-2 exhaust system

although I would like to, I cant afford to replace the system at the moment, so a quick fix is needed

after removing the exhaust to replace a couple broken exhaust studs, I ran into issues fitting the exhaust back on properly/tightly

best way I can explain is that where the pipes meet the header, there is a lot of free play. even with the flanges tightened all the way down. the pipe moves back and forth in the port...it will not sit flush against the gasket, and when running blue flames shot out :eek: obviously not a good thing so she will remain parked til I solve this (hopefully soon)

I looked up some images of the stock system and noticed that there is a lip around the pipes near the head:



since my current pipes dont have this lip, is this creating the issue?
my other thought is to replace the part circled here:


no clue what the name of this part is but with how the pipes were setup these went between the flange and pipe. they are pretty well rusted..

regardless, any help will be much appreciated.
 
#2 ·
show us pictures of your exhaust...too difficult to understand from your description
 
#3 ·
From the pictures you provided , it looks like you need those pieces between the flange and the lip of the pipe at the head. Similar to the earlier cb450's.
 
#4 ·
A number of the aftermarket pipe suppliers went with the two 1/2 collars similar to the CB350's and other early models. The thin edge fits against the pipe and the thicker side against the flange. It still requires the copper crush gasket for each pipe to seal against the head.
 
#5 ·
I have resolved the issue, thank you to those who provided input

as it turns out, I was installing the exhaust collars the wrong way on the pipe