I have just acquired a 1995 Polaris Magnum 425. I have done quite a few things to get it running again: New CDI, New Spark Plug, Took Carburetor apart and thoroughly cleaned all parts and jets cleared, gravity fee fuel from separate tank right now, I’ve checked the ETC and have taken slack out of throttle cable, and new air filter, boots on both sides or carb don’t seem to have any vacuum leaks…..etc. HOWEVER, i can only get it to idle fine but it won’t throttle up for the first 10 seconds of trying or so….then…suddenly it will throttle up and down fine but when you let it back down to idle it won’t throttle up again and pops alot until it suddenly does throttle up again. Any help would be greatly appreciated. Thanks so much.