just a quick question about the explanation for this "cold seizure" phenomenon.... (gee can you see my bias showing yet????)
why didnt my trail bike ever experience such a thing when it hit water crossing creeks etc?
what about jetskis, that travel thru different water temps all the time?
Sounds EITHER like
a breakdown in lubrication due to high temps, or
the engine was run at full throttle from dead cold (which MAY cause a seizure due to tight hot pistons contacting relatively cold, small bores), which doesnt fit the case here
If the piston/cylinder clearances are pretty tight to start with, and your lubrication is a bit suspect, then high revs & temps will expose any probs REAL quick.
If using premix in the engines, how often do you (re)shake the mix, to make sure there was no settling? (yep, not supposed to come out of mix, but I always used to shake my premix before refueling my bike)
And if using direct oil injection, maybe the injector wasnt delivering enough oil at high revs
And to quote Tomo,
But on take off, full power, and climbing (assuming) the airflow and power setting makes it hard to imagine any amount of cold causing a stoppage, on a water cooled engine