Polaris Indy 440 No Muffler
Hello. I recently cut out my baffle on my single piece exhaust on my 92 440. I left the convergent cone on the pipe alone and welded the same outlet pipe back that came out the bottom back onto the rear cone. The outlet pipe is the same diameter as the outlet of the expansion pipe. From what I know, outlet pipes have little effect on the performance, heat, fuel consumption, and a/f ratio of a two stroke. If anyone knows different please let me know. I planned on water crossing this in the summer so I was going to jet down from 290 (stock with 38mm carbs) to a 250 for running in 70-90 degrees. But I want to make sure that I'm not going to be any leaner now without the baffle. Is 250 too lean either way? How about pilot jets for summer? Sorry lots of questions. Any help or advice would be great. Thanks, Erik.
Polaris XLT - SLP pipes, SLP billet heads, clutched, Racepak Avenger III EGT, RSI bars, Cobra windshield, Fox front clickers, Pro-X rear suspension, 192 stud track, RMK seat and tank, plastic skis, painted hood and vents
1999 Arctic Cat Z440 Sno Pro-