Hi all at TT i,am new to this site and looking for some answers relating to overheating problem of yz250f, i,am pretty much novice to 4 stroke mx bikes and have just recently taken delivery of yz250f which on starting at the weekend overheated after warm up idling and riding for maximum 10 mins please note during the start up and ride i do recall hearing some kind of whining noise !!! - the overheating led to the point it blew the cylinder head breather hose blew off the retaining clip and dumped coolant likewise from overflow pipe,
Not exactly sure whats happened here and by no means a four stroke expert on matter subject - coolant air lock in radiator !! problem with the water / coolant pump / seal bearings !!!, could the water pump bearings / seals / impeller have failed, - would appreciate any feedback support whom have experienced similar problems and whats the way forward to get the beast alive and ticking.
Most obviously i,am going to have to strip down water pump / check radiator, hoses etc for blockages, drain off engine oil and check condition - any of you guys experienced anything like this, thought these four bangers were reliable solid machines.
PS i,am almost sure there was residue of oil trace on the coolant that was blown out...
Advance thanks... for any support any can offer.
Edited by ghyzfbanger, 11 July 2012 - 02:34 AM.