yamaha dt125r coolant problem?

if water is coming out of the expansion tank under the side panel it is almost definatly head gasket

des
September 2008

give the bike 2 me and the problem is solved

bluerider
August 2008

Hi
My son had the same problem.
We fitted a new radiator cap and a new cap for the expansion tank, which was a much tighter fit than the old one and also removed the thermostat from the top of the cylinder head. It seems to have stopped the coolant problem but the bike still overheats on long journeys.
I hope this helps

Andy
July 2008