Thanks to everyone posting about the oxygen sensor. Pulled mine on the 2001 200 and cleaned it and the casing but didn't know about the sniff tube until I read it on here a while back. I guess my results were good for a day (rpms were constant 5500 and ran 55 mph) but then went back to fluctuating and 45-51 mph) so I gather I need to buy gaskets and redo the cleaning/de carb and clean the sniff tube, or should I spend those prcious $$$ and replace? Thanks to everyone who has helped my "Ranger Way Too Slow"!!