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engine ys 63

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Old 05-26-2007 | 04:50 PM
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From: rome, ITALY
Default engine ys 63

hello everybody
I recently bought from ebay a second hand YS 63 engine. When I opened the parcel and examined the engine, I realized that on the crankcase the code FZ-53 is printed.
I wonder if that engine is really a .63 or it is the more little .53!!
Can anyone help me with this doubt?
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Old 05-26-2007 | 05:13 PM
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From: coolidge, AZ
Default RE: engine ys 63

i think the crank thread on the 53 is 7 mm and the 63 is 8 mm

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