Hey kinda new to forum but I am having trouble with my 450 rhino. I can't get it to run over 15 mph. I have had carburetor cleaned,new air filter and new fuel pump. Welcome any suggestions as to what might be going on with its low top end. Has a strong take off. You can feel the back end squat on take off in high or low gears. Clutch sheaves and belt look to be ok. Was spitting and popping once gas pedal was mashed to floor but I changed out cdi and rhino quit spitting and popping at full throttle just no speed still.