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I have a 2015 Polaris sportsman 80s 570 just put a new engine in it with a 625 big bore kit from riv6 now everything runs fine up until 45 mph and then it surges like it has a rev limiter or a speed limiter in it sent the computer back to be reprogrammed they said there's nothing in the computer no speed limiter no rev limiter but it's doing the same thing check fuel pressure. Then yesterday I thought well let me unplug this speed sensor to see if maybe it's a speed limiter in the computer. Shortly after I started writing it the codes on the dash came on and it died the code said crank positioning sensor and speed sensor any ideas
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