On the 150 stock carbs the pilot jets are the same both scooter and buggy. The main jets will very though. These new buggies are coming with as small as 95 jets. Not saying the jets won't affect your performance but from what you are describing it sounds as if your CVT could be hanging for the belt is not returning completely to it's rest position. However as I said before you need to know the basic vital signs which are air, fuel, spark and compression. If your compression is down the engine will not have the power to pull a hill but be OK in a less loaded situation. I cannot tell you how many times someone either called for help or brought their vehicle to me after replacing everything on it stating the same thing, the last time it ran it ran like a raped ape and I found compression low either to worn or misadjusted valves and a few times stuck rings.
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