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shipdamite
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What engine is that?? Those are not TY 175 cases. Look at the kickstarter location and the lack of a clutch adjuster screw. YZ cases??

After some investigation I think that they are 1976-79 YZ250 cases. Clutch cover fits various YZ's and IT's from 76-80 and 250-400cc. The cylinder base gasket is the same as a TY 250 74-77

Double check me but that is what I think

{ps I'm a parts manager at a Yamaha shop so I kind of cheated}

Edited by spinner
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The bike with the dell orto carby that Craig is sitting on has a cylinder which displays a part number in the casting, which identifies it as originating from a TY250B

The engine inner cases and engine covers on that same bike look they are from a 1970s Yamaha works motor that Mick Andrews used

The kickstart lever on that same bike is TY175

Edited by feetupfun
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What engine is that?? Those are not TY 175 cases. Look at the kickstarter location and the lack of a clutch adjuster screw. YZ cases??

After some investigation I think that they are 1976-79 YZ250 cases. Clutch cover fits various YZ's and IT's from 76-80 and 250-400cc. The cylinder base gasket is the same as a TY 250 74-77

Double check me but that is what I think

{ps I'm a parts manager at a Yamaha shop so I kind of cheated}

I bet that magneto cover would not fit on the inner cases of a YZ

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