ok today i went riding and was back in the woods going slow and steam started blowing out of the radiator overflow. checked the coolant level after it cooled down and it was low so i filled it up rode about five minutes then checked itand toped it off. went riding deep in the woods again about 30 minutes and did it again. anyone have any ideas? i just bought the bike so im still learning about it. could it be carb running lean does anyone know the stock jets and settings so i could check that. any other ideas would be greatly appreciated.