I am working on another refurb where the exhaust is perfectly sound but the stainless steel guard (decoration!) has been badly marked.
The guards are held in with four rivets and are easily removed to allow the exhaust to be properly cleaned and painted.
I took the old stainless steel guard along to my fabrication firm and asked them to match it in shape and thickness. The only slight difference is that I had two of the holes slightly slotted to ease fitting.
This is the old guard alongside its replacement. I am not very good at photographing shiny stuff so apologies in advance for some duff pics
I cleaned up the exhaust and painted it.
After a false start when I tried fitting the guard and bending it around in situ, I took out the two rivets and bent it in a circle before fitting.
The first two rivets are easy to fit.
The second two rivets use the slotted holes and are a bit trickier. I helped matters along by locating a screwdriver in one hole whilst rivetting the other.
The edges were still a bit raised so I fixed that by covering them with a bit of cloth and tapping them down with a hide hammer.
Job done!
I am very pleased with the result and will take another pic when the exhaust is back on the TTR.
AFAIK all the TTR exhaust are the same except for those on the blue US models which have a different type of steel guard and a chrome end cap - maybe a spark arrestor?
There is a slight difference in that the exit hole on early TTRs is in the middle and its offset on later ones - presumably moved after Mr Yamaha realised the original design was melting UK-sized number plates