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Exhaust Pipe--H Box Seperation (UGH!!)

2325 Views 9 Replies 9 Participants Last post by  Stan
The last and only other time I dropped my engine I made a moderate attempt to seperate my exhaust pipes from the H-box with no luck and ended up taking them away and then re-installing them (the two pipes and the box) as one piece since I had more pressing issues to deal with.

Since then, however, I've procured a much more attractive set of pipes and would love to swap them out with the much grungier ones that refused to cooperate the first time around.

Has anyone ever fought this battle and won?? I'm dealing with an '81 Custom with 75K on the odometer. Heat?? Solvents? I fear getting too heavy handed and trashing the box and/or the pipes that are now on the bike and perfectly funcional.

Thanks, as always, for any thoughts on the matter.....;gweric
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What works best for me is to spread the tangs slightly with a screwdriver. Then apply Kroil (or maybe an ATF/acetone mix) to the joint and let it sit for a day to work in. Rock the pipe side-to-side and twist back and forth while pulling apart.

For tough cases the whole process may need to be repeated.

The gaskets usually get destroyed in the process but they are still available from Honda, although they are expensive.
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