steviem08

Sorry if some of this doesnt all make sense. New to the bike world. had a top end rebuild on my TDR 125 a couple of weeks ago. After this it began to leak water. Got the barrel and head skimmmed and put in a new gasket set. Bike ran perfectly for about 250 miles after this but yesterday it started to over-heat really quickly. Checked coolant level seems perfect, not airlocked and isnt leaking water from anywhere. Noticed a black oily residue on the bracket near the chain. I cleaned this off to see if it was a fresh leak but after driving there doesnt appear to be any more leak. Pipes around the radiator are hot which i think means that the water is circulating!? Any help or suggestions greatly appreciated Cheers