Well, I'm not really sure just yet. For a while I was thinking the bogging I get when I flip the throttle quickly was carburetor problems. Then, I ran across numerous posts on how the Polaris 500 was notorious, about the exhaust lobes on the camshaft being too soft. When the new carb was put on, I don't think they adjusted the pilot air adjustment. I assume if the cam lobe has a lot of wear it would show up in a compression check? If, I rev the throttle a little quicker than medium speed I get now bogging. I f I flip it really fast it will bogging and lightly pop just a slight bit but, nothing really bad. I can ride it with no problems. I do think it needs a new drive belt. Sometimes when riding, it kinda seems like it's slipping some and I get that smell of melting/ burning rubber. ๐