Old YS 60SR Motors

Because the comment said it had been "NIB and ONS but some parts are lost", I made a bid on YS 60SR old motor, but the arrived one proved that it had been a white lie at all. A peeping from the plug hole should show and realize the stuck and clogged carbon on the piston top surface and this motor must have been operated by some less experience layman, according to the disassembling procedure, not a few inconvenient parts were found by an amateur fingered Chestnut Lane marks inside. Frontal and main bearing were set with metal sealing condition with the original hard grease packed, sealing cap constructions should be removed and they should be lubricated by circulating motor fuel, all the ill-assembled including the screws of different dimensions were corrected and cleaned thoroughly, in addition, catching  this opportunity, all the YS 60SR motors I'm keeping were maintained in the same manners as done on the newcomer. The free time afternoon on Saturday was spent for the purpose with a little fatigue. Development opportunities are the sake of completeness. Motors in good condition is a key to comfortable and enjoyable flight of Radio Controlled Model Airplane at all.
Sukhoi 31 is not finished for the flight, reinforcing on the center connection of the main wing requires special material, FRP, the kit was arrived the day before yesterday, so, today's task is the dusty chemical material using procedure.