GM's L92 V8 is built to last, but a teardown reveals a recurring flaw that can turn this tough engine into scrap metal.

He does, though, have two specifications of Yamaha’s inline-four engine to try in Aragon, where the V4 variant of the YZR-M1 is still absent. “We have two engines,” Fernandez said.

Here's the process of making this rotary valve engine with a different intake and an exhaust system. It wasn't easy to start ...

Many of you have seen the process of making this rotary valve engine with different intake and exhaust system and how I tried ...