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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Pro Jr Overheating!!!
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[QUOTE="CNM, post: 708889, member: 16982"] My son got a 2003 Pro Jr from Santa. The first few short rides were great! It's taking him a little to get used to the quick power but he can't quit smiling! :laugh: We went riding Sunday and had all kinds of problems. Not long after we hit the trails the bike started overheating really bad. Coolant was boiling over and steaming. Luckily we caught it before it stuck the piston. Since the factory KTM coolant is clear, we weren't sure if there was coolant in the radiator or just water. Especially since we couldn't smell anything when it boiled over. We filled the radiator with Engine Ice pre-mixed coolant and it seemed to run great in the pasture. As soon as we hit the woods again though, it overheated again. The dealer where I got it says it needs different jetting so it will run cooler at slow speeds. I guess that will help but I'm not convinced that is the ONLY problem. I can see coolant flowing around in the radiator but maybe there is another problem with the water pump. Oh yeah....no water appears to be in the oil to suggest water pump failure. Help........if it overheats in 50 degree weather what is it going to do this summer when the temp hits 90+. Has anyone else had this problem and what are your thoughts? [/QUOTE]
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MX, SX & Off-Road Discussions
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Pro Jr Overheating!!!
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