Dr C introduction

Added: 2026-05-18

[00:00:00]One of the very few prototype racing classes still left for affordable money is the Supermono, and it's open for one-cylinder four-stroke engines up to 800 cubic centimeters. And that has been my poison for a long time, and uh this is my weapon.

[00:00:23]With the fairings on, this looks like any ordinary race bike, but with the close off, you might wonder, what the hell am I looking at? And this is a frame which I manufactured myself from chromoly steel thin tubing and a single-sided swingarm, which was a total drag to manufacture.

[00:00:43]And the engine, you might ask, what is that? That's also my design uh in a uh machine from billet aluminum.

[00:00:52]And with a throttle body from a Ducati 1198 and a MegaSquirt EFI system, total loss with the batteries, uh and water-cooled, of course, and um it goes like bullets.

[00:01:12]This engine is 680 cubic centimeters.

[00:01:16]It's has 104 mm bore, so it's a big lug going up and down at maximum 9,200 RPMs.

[00:01:27]The stroke is 80 mm.

[00:01:30]Uh the whole thing weighs about 116 kg without fuel.

[00:01:36]Um and it produces somewhere around 88 horsepower on the rear wheel.

[00:01:44]And uh well, the combination of a 116 kilos and 88 horsepower makes it a thrill to ride.

[00:01:53]There is a counterbalancer here, and that's really important to keep vibrations down because that can be a total problem for a supermono.

[00:02:03]Normal supermono disease is cracking the rear damper due to the vibrations and the when it resonates.

[00:02:13]But the counter balancer here takes care of that. It's a tungsten to make it efficient.

[00:02:21]Another thing is the exhaust system ending up in a chamber here to get the reflections at the exact where I want them to be.

[00:02:32]And the single-sided swing arm was tough to to bend the 2-in tubing here with thin walls.

[00:02:42]An aluminum tank with fuel.

[00:02:46]Up here there is only the dummy for a airbox.

[00:02:52]And that's about it.

[00:02:57]Of course, this wouldn't have been possible without a network of highly skilled entrepreneurs around this area.

[00:03:04]And the milling has been done by Mosbys Mekaniska.

[00:03:10]I've done the 3D models.

[00:03:13]This one I think I spent 250 hours on producing, but Tobias has made all the machining. This for instance is of Alumec. It's have a tensile strength strength about the same as stainless steel. It's really tough.

[00:03:31]And the head design has been um done with Toplocks Verkstad.

[00:03:39]A workshop here close by that does nothing but cylinder head work.

[00:03:46]And there are a lot of people around me that has made this possible, so I owe them big thanks for that.

[00:04:07]Thanks for stopping by and watching. If you liked what you saw, then please hit the like button. And if you want to know something more about this creation, then please write something. Write your questions in the comment field.

[00:04:23]And I'll try to answer them as best as I can, either directly in the comments or I'll make a new video for you guys.

[00:04:32]So, till next time.