Hey I know this is a few years later but you said replacing your injectors on your 19 rmk did not work to solve the below 5000rpm surge and die problem. I have a 2020 rmk 800 doing same did you fix your 19??? And how???My injector replacement fix lasted approx. 600 miles and now same problem is back . Starts fine . but engine surges at low rpm after sled is warm. Gets worse as day goes on especially if you stop during a ride and then restart in 10-15 minutes . mechanic is thinking to try tmap sensor or fuel pump next.