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Mend Yamaha DT125R Water Pressure Build

yamaha dt125r water pressure build up?

i have a 1990 dt125r
just had complete engine rebuild
the problem is when i start the bike up and rev it a bit the water shoots out of the radiator overflow pipe
and it over heats to quick
its had complete engine rebuild its baffled me ......

skinner
May 2007
YamahaYamaha DT125RVehicles, MotorcyclesWater Pressure Build
sounds like the cylinder head is blowing did you use new gaskets and did the head get torqued down to the correct tightness?

adrian g
May 2007
Blown head gasket. Not rebuilt properly then.

t
May 2007

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Yamaha DT125R Overheating & Water Pressure Issue