SX150 Frame & Engine numbers

I’m buying a 1967 SX150 project and the engine number is 559 higher than the frame number, does that round about right? I seem to remember that they should be within about 600 but could have imagined this!
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davla wrote:I’m buying a 1967 SX150 project and the engine number is 559 higher than the frame number, does that round about right? I seem to remember that they should be within about 600 but could have imagined this!