The RSD Desmo Tracker is finally finished, tested and thrashed just enough to ensure she’s ready to do battle on the streets of San Diego. The Desmo Tracker was a difficult build in many ways. As you can imagine digging your hands into the Mona Lisa is not done without a measure of respect and reserve. But this is how we approach most of our builds as we attempt to retain what is best of the original design and to explore ways to improve or change the function of the machine in a way the new owner would like to enjoy his machine. The words Moto GP and Dirttrack couldn’t be further from the other in terms of function and aesthetic on two wheels. Our job was too blend the two into something that could be at home on the show room floor ready for public consumption with a push button starter, comfortable egro’s, street and dirt worthy suspension, lights and 180 plus horsepower on tap. We feel we have obtained that goal.
Desmo Blog 7
Desmo continues on her path to another existence. A path scattered with
gravel, clay and dirt. Computer driven telemetry and laptops have been
traded in for tire groovers and rawhide mallets. She accepts her fate
gracefully. At her heart lies a deep desire to scream at the better part
of 18,000 RPM. She shall be given the opportunity to satisfy her
desires, but on another field of battle. Perhaps the there is a mile or
two of flat dirt somewhere in her future with enough grip to put her to
the test. Wheeling, sliding and begging for just a little more track,
just a little wider exit.. God bless the brave soul who dares to test
Desmo Blog 6
When building a custom swing arm there are many things you need to take into consideration before starting. Basic geometry/ length, shock position, chain line, center line of wheel and tire clearance are the most important. So we don’t build blindly, we first faro arm the stock swing arm to get all the info necessary. We then model it up so we know what we are building is going to work. Once the model is complete we start the fixture for the build. Here are a few examples of the design, fixture and build for the Desmo tracker swingarm.
Here’s a little story Guy Procter, the Senior Editor from Motorcycle News, wrote.
It’s always nice when a project starts to take shape. Pencil lines become sheet metal. It starts to feel like you’re getting somewhere…It’s a good Friday. Time for a beer.
Blog 3 Next up is the tail section. We’ve left the tank unfinished as we want to make sure to match the tail sections lines as close as possible. We got our hands on a power hammer which makes shaping the aluminum bodywork much easier. Templates have been made taped together and cut in raw aluminum. We have maintained a nice seat line that is half desmo and half flat track. We were lucky to have an original flat track tail and seat in the rafters to aid us with our lines. After much debate we decided the tail must be made of aluminum. It would have been so easy to of bolted the fiberglass unit on, but what’s the fun in that. Much attention has been paid to making the seat area comfortable and with a nice radius to flow with the inner thigh area. Sharp edges mean pinched skin and we are not fans of unneeded pain while throwing a bike into a slide at 100plus MPH.
Blog 2 The sub frame has been complete as well as the gas tank base/airbox cover, top and sides. We utilized many of the Desmo’s original lines while giving it a large radius and lowering the tank considerably from the stock position. We machined a new fuel pump base and mounted it in the bottom of the tank above the exhaust exit and rear cylinder head at an aesthetically pleasing angle. This will allow us to keep the sub frame area as open as possible as we plan on doing trellis bracing in that area and don’t want to have a jumble of wires and hoses in that area.
The Ducati Demosedici completely blew away the motorcycle world in its debut in 2008. The only true, street legal Moto GP race bike made available to the general public. With a limited production of 1,500 units worldwide, the 500 shipped to the US sold out in just 5 hours! This box-stock V4-powered machine cranks out 200 HP, redlines at 16,000 RPM and weighs in at a nimble 377 lb. What more could you ask for?
Well, our good friend Justyn Amstutz (owner of 3 Desmo’s) is not one to leave anything alone. We already did the teardown on his ZERO-mile bike in order to start converting it into our version of a street legal, “Street Tracker”. All of the bodywork was preserved to allow him to use as spares in case he lays down one of his other Desmos. We started mock up of the project by putting it on some spoked wheels with flat track race tires. We then fab’d up a subframe, and started on creating the tail section and aluminum gas tank to get that flat track inspired appearance.
Justyn Amstutz completing teardown on his own machine.