Check to see if the breather line for your gas tank is not pinched anywhere. if it is pinched it will idle ok, but as soon as you give it some throttle it will bog and die. Hope this helps you out.

Keep on riding!!

 

Your Magnum has a Mikuni CV carb. It operates on vacum to maintain air flow. Check the diaphram in the top of the carb. Then check the needle for worn spots along it's length. I know it sounds wierd but just look for areas that are not smooth and shiney. Other than that take the carb completly aprt for a very careful cleaning and blow out all the passages.

 

Ok, I am screaming UNCLE....It is now a big pile of ash and burnt metal, I put a stinking match to it.....ok, just kidding. but I have done everything I can possibly think of and It still runs like poo poo...I do believe it is electrical, maybe the ciol but I don't know how to test it, I think I will have to take it to the shop and have them tell me what the problem is and then get it back and fix it, What does the polaris shop normally charge to check one out? I would like to say thanks to everyone that has gave me ideas and help to overcome this problem...