Motocross piston Compressor 250cc 77mm
thingiverse
Most modern 250 4 stroke motorcorss bikes use the magic ratio of a 76.76mm piston and 55mm stroke ratio - CRF, KXF etc. This is a tapered cylinder to aid compressing the rings to fit a new piston. This specific model incorporates the head dowels as locating pins to assist in aligning the ring compressor with the barrel with a Honda CRF250R 2016 model. This may fit other years and even other models, however can be used with any 76+/-1mm piston. Print in PLA, .2mm layer hight does help create a smoother bore, however I have prototyped it a .28 and it worked fine. This has the Hinda motorcycles logo and CRF logo embossed on the side.
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