Good ideas of cleaning carbon out of an expansion pipe

[greenhaze20]

The service book says you take an old chain or wire and insert it into a two stroke expansion pipe to clean out the carbon. Does anyone have any other good teqniques I have seen a few guys on YouTube heat up the pipe and burn the carbon out with a flame, that's a little nuts. I have a can of carb choke cleaner and have been spraying that inside. Any other good ideas, trying to clean a fmf fatty pipe off of a 1986 250r.





Thanks,
Andrew

[yaegerb]

When I rebuild a pipe I take a MAPP torch and heat every inch of the expansion chamber cherry red and burn the carbon deposits out. It's not nuts, it works. Just do it on a concrete floor or outside. Lots of flames and smoke. Once it's cooled tap on the pipe and watch all the carbon come out.

[greenhaze20]

The map gas tourch will not discolor the crome finish on the fmf pipe?

[yaegerb]

The map gas tourch will not discolor the crome finish on the fmf pipe?

It will, but you could polish it out. I have a buffing wheel that I use if the chrome is discolored afterwards.

I don't know if you can chuck this up in a drill, but this may be an alternative if you are worried about discoloration.

https://www.amazon.com/Rutland-4-Inc.../dp/B001OAXTYY

[greenhaze20]

Thanks for the knowledge i may try both ways.