the wristpins are pressed into the small end of the rod and allowed to float in the piston's pin towers. The press-fit into the rod keeps the pin from sliding out of position and scrubbing the ...

Even if the bores in the piston’s pin towers measure out right, never assume they are straight. The test for this is relatively straightforward: Insert the wristpin in the bore in one pin tower ...

Over the years I've gathered quite a collection of weird tools that solve pesky problems, simplify tedious tasks, or because they're just plain cool ideas. From time to time, I'll share some of ...

The rods would distort as the engine speed increased, pulling the piston pin out of its proper orientation and causing the parts to break. After a lot of bad showings, the oval piston bikes would ...