Motorcycle chain lube drain

thingiverse

This is a lot more generic than my chain cleaner sump, and it's fully parameterized to fit any motorcycle. It's also a heck of a lot better than my attempt in 2003 with nails and pine boards! 3D printing for the win! This is meant to hold half a PVC pipe under the motorcycle's chain run to collect drips when cleaning or lubing the chain. Most sportbikes today have hollow axles, and the rod slides into the axle. "insert_dia" is the rear axle hole inside diameter, minus about 1/2mm to make it slide easily "sprocket_radius" is the rear chain sprocket radius "offset" is the amount of offset needed to center the pipe support under the chain I used 2" Schedule 40 PVC pipe, which comes in convenient 2-foot lengths at Lowe's. Cut the pipe in half lengthwise. When you do this, DO NOT just chuck the pipe in a vise, because when you cut it, the pressure from the vise will close the cut and snag the blade. Put a C-clamp in the vise, and put the pipe in the C-clamp as per the picture. I used a Dremel Saw-Max. A hacksaw with the blade rotated 90° might work too. To draw the cut lines, I put a piece of 1" pine next to it and used a Sharpie, then I rotated the pipe 180° by eye, and drew the other line. This is not a precision operation, nor does it need to be. Print the hanger on its side as per the picture. This uses the least support material and gives the fastest print and strongest result. I used 10% infill. Use standard PVC pipe cement to glue the pipe to the hanger. Make sure you glue it on the right way round! The pipe should point forward so it lies under the chain. I used PLA and it wasn't bothered by the PVC glue, kerosene, or chain lube.