I'm a newbie to the forum and need a little help. I'm riding a 96 xcr 600 sp. The sled has an '97 Ultra 680 top end with AAEN pipes, rebuilt primary with purple spring and 54 g weights, older secondary (non-adjustable cam), stock carbs. I've got great top end and the sled really goes well if I am moving and the engine is running above 6000 rpm. The sled starts fine and idles great, but it really stutters off of the line. I've sync'd the carbs and adjusted the chokes so I think that the problem is with the clutching but I'm not sure. There seems to be too much deflection in the belt, could this be the problem? The sled also burns WAY too much oil, at least a quart per tank! The bottom end is so bad that I could'nt even tow my buddies sled. HELP!