Hi there KOS,
I've modyfied the exhaust pipe because of our expirience in racing with a 250 Honda.
For removing the exhaust after every training and race it is much easier to just remove the springs.
And now that 1 tread of M8 is almost gone in the cilinderhead I wanted to mount the flange for ones and for all.
It doesn't matter howmany times the exhaust must be removed the tread will always be oke.
This way, if any exhaust must be removed I only need to pull 2 springs and it's gone.
If all four exhausts must be removed only 8 springs and 2 bolts have to be removed.
I've used the original flange to fit in the exhaust port. I've just cut them of the exhaustpipes.
Then a double flange was made to fit on both sides over the original pipe.
the lose double flanges
Is this what you asked?
Regards