MV Agusta sidecar – owner built
I’m at a loss writing about this outfit as it is of a standard that can only be achieved by a person of great skill or a person with a money-is-no-issue expense account. In this case the outfit is built by the owner who not only has the talent and resources but also the experience having evolved similar, show winning sidecar outfits. Yeah, and he’s a para.
and again from the rear:
Starting with a wreak of the beautiful F4 MV Agusta the owner, German Roland Herbig, built this outfit including the sidecar suspension and frame, the bikes centre-hub front steering / suspension and the bikes rear car tyre conversion. Roland rides the prize winning unit by transferring onto the bike and storing his wheelchair in the sidecar. He has a website describing the build process of this and previous outfits at www.r-herbig.de/ and we reproduce some of his pictures, with permission, here at 3wheels.org
The heart of this bikes front end is the steerable hub that carries the axle, brake rotor and calliper and is suspended by a forward facing swingarm with a horizontal coil-over dampener located low between the bike and sidecar. Builders mostly adapt a car hub for this type of steering however here Roland has given full reign to his talents and has milled 15kg’s of high strength aluminium (AiZnMgCu) down to the 3kg heart of the hub.
Components Roland has used in his front end include a turned-down ventilated disc rotor from a BMW-M3, a calliper from a Porsche with a second opposing Tocico 6-piston calliper. All this with appropriate spacers and carriers fit neatly inside the car rim.
In the picture below the hub assembly is being located with respect to the bike for construction of the swingarm, look closely and you will see construction guidelines for lateral alignment and for calculation of the trail. For this outfit Roland has settled on 20-40mm trail which will lighten the steering considerably while straight line tracking will be aided by the profile of the car tyre.
Eventually the hub will be steered by a knuckle extending near vertically over the front mudguard and attached by tierods to the downtubes cut-off just below the triple-clamps.
Rolands artistic and technical skills are again evident in the beautifully bent and braced front swingarm.
Being a sports bike from the factory, a F4 MV Agusta has a minimal frame designed to achieve a certain stiffness with minimum weight. To mount a sidecar to such a frame requires a substantial subframe taking the chair loads to multiple points on both sides of the original frame.
Sidecar suspension is constructed in the same meticulous manner by Roland and includes a beautifully machined hub and bearing carrier with quality tube work again evident in the bends of the swingarm. Toe-in is adjusted at the bearing block. Braking of the sidecar wheel is with twin Brembo callipers. I admit to not knowing the brake linkage arrangement that Roland rides with. Evident in some of the pics is twin brake levers so I suspect the bikes and sidecar callipers operate independently giving insane cornering capabilities!
For a boat, Roland chose the Ruko Shark and makes use of the slotted nose to take care of the bikes cooling. A F4 has the radiators and oil-cooler behind a full faring but Rolands bike had wreaked its fairing in the original crash besides which both the new steering and subframe cluttered the original radiator location. A new half fairing has been made from the upper portion of an original and shows off the beautiful tube work of the front of the bike.
An awesome piece of art, pictures do greater justice than my inadequate words, check out Roland’s website at www.r-herbig.de/ and Richard-Nl’s report on ADVRIDER at http://www.advrider.com/forums/showthread.php?t=415216&page=5