Army Of Darkness won the 2020 N2/WERA National Endurance Championship on a 2020-model Yamaha YZF-R1. They then went on to win the 2021 and 2022 championships, as well.

Eventually, the 2020 engine started jumping out of gear, which was going to require a complete tear down to rebuild the engine for the 2023 season.

Michael Godin at KWS Motorsports offered to inspect and rebuild it, so follow along we see how the valves, seats, pistons, rings, bearings, and clutch look after 4,000 miles at redline.

00:57 Clutch Plates

01:34 Metal tailings in oil pan

03:33 Worn transmission dogs! (the cause of our problems!)

05:06 Crossplane Crankshaft explained

08:45 Shiftshaft mechanism

10:57 Discussion of engine building philosophy with AOD slideshow

18:06 Chris Peris and Ben Walters lap Barber on AOD bikes

Part 3 takes a deep dive into the bottom end to examine the bearings, clutch, crankshaft, cylinders and transmission gears.

There is also some fun photos of the team and a nice lap of Barber Motorsports Park by Chris Peris and Ben Walters at the end of the video.

Please enjoy Part Three and subscribe to the channel!

In 2023, AOD was sponsored by: Army of Darkness, Dunlop, Yamaha Champions Riding School, Yamaha, Industry13, Chicken Hawk, Woodcraft, Hindle, Supersprox, N2, WERA, and Roadracing World.