I just bought a used 107cc sikk inc pit bike for my son. The rear brake line is leaking somewhere after the resevor. Each day there is brake fluid on the ground under the bike, and then today the rear tire kept bubbling over the rim and wouldnt seat right. I think the inside of the tire might be bad, its a dunlop tire. Any help or advice would be great, Im looking for a shop here in so cal to buy parts and have it serviced. Wouldnt mind having the whole bike gone through and a tune up service. Thanks - Jeremy