Do you have any after pics you can share with us? So no CEL/MIL's of any kind? Thats awesome and something i'd be interested in trying out.I have a CB500F. If the cat is cut out, but the O2 sensor reinstalled, the PGM FI will work as normal, so long as the exhaust system is fully gas tight.
The cat is in the box at rear of the headers. I cut out the box, welded longer stainless pipes onto the headers into a 2 into 1 collector and tail pipe. The sensor was installed in the tail pipe just after the collector.
The bike runs better than before in all conditions. No noticeable increase in top speed, but acceleration definitely improved.
The PGM FI is producing a leaner mixture now, evidenced by absence of sooty coating in the muffler outlet pipe, and although I've not tried to measure it mpg is noticeably improved.
I did the conversion to produce a more 'naked' look, and certainly achieved that. The performance improvements were welcome and not unexpected additional benefits.