Maintenance & Technical > KX500 Original
Dry piston install
muleman:
I only installl them dry when I put them in back wards. :-D
tharden:
I have mostly built chain saws and they are similar to a dirtbike but overall are built to handle more extreme conditions and run longer in between rebuilds. I have yet to rebuild one that did not have a thin coat of two cycle oil on the piston,rings, and bearings. I have seen too many scored pistons from lean running conditions and poor lubrication or no lubrication.
turtle22:
i can not see how stuffing a dry piston in would not score the cylinder. i have only built automotive(cars&trucks) engines(at this point),i always hone the cylinders(so that oil will flow). i cant see how it would be any differant on a 2stroke
slow600:
heres a link from tt where eddie sisneros goes into it briefly. he makes more power with the thumpers than anyone, kinda like stewart and the 5hundys. from what i researched most people are just too "yella" to try something different with something so critial. im hope i dont sound like a know-it-all cause im not. when i did my research about dry installs seemed like a lot more evidence supporting than against it whether it was a car, diesel or whatever. i would like to see some evidence supporting oil installs, not just personal preference. oh and im a firm believer in the moto-man break in.
:-D
http://www.thumpertalk.com/forum/archive/index.php/t-612236.html
muleman:
Here is some real good support try and run it with out oil (go boom). It is designed to have oil. Show me a manual that says not to coat it. All the one I have read say put a light coat on the cylinder and rings.
I see there point don't get me wrong There point is a dry ring will file seat faster and have a better seal. But unless you sit there and kick it with the gas off for a while and heat it up with a heat gun your piston will not expaned and seal right any way.
Good luck on your search.
:-D
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