I have an IT250K "83 motor that has a hairline crack around part of the base of the cylinder & short of getting it welded i'm wondering if a cylinder off say a YZ250H might have the same bolt pattern [base gasket etc]. I realise the stroke is different, well i think the ITK's 68x70 & YZH would still be the 70x64 without looking, but not worried about that. Being a cheap arse i'll probably put long through bolts screwed into overlong base nuts [or something] to hold the whole lot together. Probably the result of loose engine bolts & a 'still tight' head steady or something. Was given the motor & as it turned out it is the original out of my ITK which has a genuine YZ465H in it [as i bought it]. Thanks.