Hello Harry!finally got the bike back yesterday:ele: .
upgraded starter gears (both come from factory as a set), one way clutch bearing and upgraded starter installed. starts great, smooth and quietly, no bing-bang like before. reason for defect was most probably defective one way clutch. thanks to advice from Alex I took off the oil sump and cleaned the oil drip filter -some teeth and some debris found. just to rinse out the engine is not enough.
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View attachment 1441