
it was dirty

i removed the engine and put-it in my apartment

most of the engine parts was jamed the piston was cracked
i drilled again the "piston chamber"

during this time, i open the cranck-case to clean it.

after changing the tires i started to reassemble the engine
it's done

the oven was very good to dry some parts after cleaning

and now its runs well


i found a lot of tricks, docs on this forum thanks to everybody