Guy Coulon is Colin Edwards’ crew chief on the Tech3 Motogp team. When Guy isn’t directing the building and maintenance of exotic race bikes, he spends his time exercising his skills building exotic engines and bikes for himself like this tube frame, 300cc inline 6 cylinder racer, an extremely impressive engineering project. I hesitate to use the word “homebuilt” since he obviously has the shop resources of a race team at his disposal but it’s, nevertheless, his own design and work. Starting, I believe, with two CBR250 engines, he machined his own cylinders and crankcase, machined a crankshaft from solid alloy and even designed his own gearbox.
The dyno says 60 horsepower at 18,500rpm, it will spin to 22,000rpm! The video below gives you a small sample of what those little cylinders sound like though not at the extreme of the rev range.
There’s not a lot of information about this project and Guy is obviously a busy fellow so what you see here is as much as we have so far.
Guy is also a friend of French builder, Daniel Mercier, who specializes in fabricating parts for and building replicas of the 1970 Honda CB750 Daytona racers. Along with those beauties, Mercier now says he will offer a replica of Coulon’s inline 6.
Whether it’s a Ducati V8 or an inline 300cc 6, projects and builders like these just make the mechanical problems you or I might encounter look a lot more manageable.
Big Thanks for the tip, Michael!