Hello I am new to this forum but I have a 96 xcr 600 I just got given to me. The snowmobile idles good and all but it doesnt take off to 4 1/2 to 5000 rpms is this a racing clutch or spring in it. What should I run in it for gas any additives we have ethanol 10% in Maine. What should I do for maintence I changed gear case oil put full synthetic ATF fluid but thats it. Any help would be much appreciated.