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Piston and Crankshaft with a Bore=72mm x Stroke=65mm. This is part of the 1975 Bultaco 250cc Pursang motorcross bike.
Hope that's allright with Kevin. Great if GrabCAD could be source for students to see how professional designers have built their models.
STEP Added Ryan
Great model Ken :)))
Hi William, That's great by me. The only thing is that the piston is a "dumb solid", which I scaled to meet the cylinder bore requirements. As a result, diameters for the rist pin are incorrect.
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