Did it start after you put the some new plugs in?
If you need any proper harness tape give me a pm and I will pop some in the post.
I have lots at the moment.
Very strange problem mate.
Are you using resistor type plugs?
If it runs well
When starting to remove it may be the extra resistance making the difference or it could be nothing to do with it but would be clutching a straws by now lol
Hope you sort it mate.
Did you try different coils or just the leads?
Not like you to give in so easily lol
You could sell me the Kat.
Don't care if it has problems lol.
Always liked it.
Almost all exhaust swaps require some jetting to get optimum performance.
Some may be close enough to run OK Ish but not spot on.
A lot of gs and gsx exhaust are similar and will fit with a bit of work.
Usually on the hangers at the rear.