I looked for it, the one I saw I couldn't read the date, I got lucky on my tank, that's the first thing I looked at when I bought it. Figured I was going to remove the cap and be looking into a rust pit, I was surprised how clean it was, going to evaporust it overnight when times comes.There is a blue k1 tank on eBay right now that I think has the same date as yours on it.
i think that cylinder would work buts it’s a later cylinder..notice the 49Cm where your original says 49cc..being it’s a numbers matching bike I would personally just buy a 3rd over piston kit and have it bored keeping it all original ..I’m sure 3rd over would clear any rust for a good rebuild..second over might even clear it out? I might have a good bore stock cylinder with the 49cc stamping..I’ll look when I get home..if I do it’s yours for free if you want. A lot of peoples bore bars wouldn’t go down far enough around here to do a 50cc. I only know one guy.Went out and checked some parts I have, found a good std. bore cylinder, is this cylinder compatible with the early Z50 or is it from a later version? Cylinder on top is the one I found, bottom is the original cylinder.View attachment 77757
That would be sweet, I will buy it if you find one, I figure mine could be bored to clear the rust, it would be nice to keep original. I'm in no hurry, got a lot of cleaning to do.i think that cylinder would work buts it’s a later cylinder..notice the 49Cm where your original says 49cc..being it’s a numbers matching bike I would personally just buy a 3rd over piston kit and have it bored keeping it all original ..I’m sure 3rd over would clear any rust for a good rebuild..second over might even clear it out? I might have a good bore stock cylinder with the 49cc stamping..I’ll look when I get home..if I do it’s yours for free if you want. A lot of peoples bore bars wouldn’t go down far enough around here to do a 50cc. I only know one guy.
GaryCurious if the frame date code matches the tank? Funny to see they have the sprocket mounted backward wonder if they were trying to get a few more miles on it or they didn't know the difference? I have the original front tire to mine unfortunately I am not near it to check it for you.
I was expecting a good layer of sludge, I see a little right at the drain plug, oil was clean as new, I'm sure not the original oil but someone kept it clean. I didn't see any evidence of the cover ever being removed.The clutch cover was that clean when you pulled it off?