2010 Kawasaki KX250F Piston-problems

[T-bone Bada]

I have seized 2 stock pistons in 2 different 2010 KX250Fs recently, anyone else had that problem? One seized because of heat (the hot-start cable was stuck slightly open, so that´s my mistake) and the other cracked from the left side to the center for some unknown reason and then seized at the end of the crack. I heard there are pistons with some kind of groove between the compression ring and the top of the piston that´s supposed to make them stand more heat, has anyone tried those and does anyone know where I could get one if they work?

[DMauro]

i have an 09 so cant help you,but i would just put in an aftermarket piston this time. i have a vertex in now with 20hours no problems.

[Loco38SUP]

What's with these 2010 models taking a dump?

It seems that you oversees guys are really tough on your bikes...that or Kawasaki is sending you the units on the tail end of the bell-curve distribution..?

RJM

[D-K]

For how long did it run with the second piston?

Maybe the first mishap clogged an oil passage? Are you sure you got everything out?

Did you re-use the cylinder or get a new one?

[harrperf]

The kawi's detonate stock due to good power production and aggressive ignition mapping.

Run better gas!

[sucmah]

better gas? I think the book on the 09' recomends 90 octane, i run 92 pump gas. Would you suggest better than that?

[Pr1malR8gw]

92 octane would be the minimum! 90 octane is to low and will definatly having preigntion resuling is damage..

as far as better gas, well yes I would say switch your current gas provider. BP, Shell, any big name company that will be less likly to put 87 octane mixed with 92 resuling in lower octane gas