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Old 01-09-2020, 06:20 PM   #28 (permalink)
EcoModding Lurker
Join Date: May 2010
Location: Louisville,TN.
Posts: 31
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My 1997 BMW has a cat and an O2 sensor. It's made into the exhaust system right in the middle. The only way to gut it would be to cut the top or bottom open. Remove the material, then weld the section you cut out back in. I think you will spend a lot of time trying to make a cat work efficiently on an older, small displacement motorcycle..
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