Quote:
Originally Posted by Thumper
That empty cat bulb should serve as a resonator now. It is better than a straight pipe to reduce back pressure. Nice!
That section of the pipe will definitely run cooler without the catalyst incinerating the unburnt fuel. It actually caused a fire once when I fell over to the right in dry grass.
I don't have access to a large pipe cutter like that. That is a clean cut.
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I just used the pipe cutter to make the mark. I used a cut off wheel on a 4 1/2 grinder to actually cut it. I was afraid the pipe cutter would reduce the diameter of the tube a bit where the cut occurred, making the cat insert hard to get out. Turns out I was right. It took some effort to get the cat sleeve separated from the tubing of that expansion chamber.
After running it some more...I think anyone who does this will have to increase the pilot jet size as well as the main. Started getting some popping on decel, so time to pull the carb bowl back off and enrichen that one too.
12-18-2023, 06:44 AM
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