An international forum for people interested in modern high performance road going sidecars.

[Moike the Squid]

Something I dreamed up over on ADVrider in their HPS racing thread...

I just brainstormed an idea for a 'universal' HPS.

First, you take the design of the standard LCR or ART monocoque chassis.




~ Remove the engine
~ Take about 2.5 to 3 feet out of the front monocoque section to shorten the axle-to-axle wheelbase of the chassis closer to that of, for example... a 2004 GSXR 1000.
~ Take a 2004 GSXR 1000 and remove it's front forks/wheel assembly, rear wheel/swingarm assembly, exhaust.
~ Mount a Rilltech Racing GSX-R1000 Wet-Sump Oil Pan
~ Mount the GSXR 1000 frame to the shortened LCR chassis keeping the bottom of the oilpan flush with the bottom of the monocoque frame and the countershaft sprocket in line with the rear wheel sprocket. The swingarm pivot, and engine-to-frame mounting bolts would be used using a cradle assembly rivited to the monocoque in much the same manner the standard LCR/ART engine cradles are mounted to the monocoque chassis, just beefier.
~ Route the exhaust on the right of the motorcycle like a drag bike, low... out the back. You can already buy these exhausts from many mfgrs.
~ Mount two cut down bits of tubing in the triple clamps to keep them square. Off the bottom of the triple clamp steering stem weld a two inch knurled shaft that will accept a steering shaft with CV joints that can be fitted to a similar knurled 2 inch stem on the center of the steering bellcrank on the LCR steering assembly.
~ The existing 2 master cylinder 3 wheel braking system on the LCR/ART chassis could be used, a simple linkage to use the stock rear brake pedal on the GSXR 1000 chassis could be fabricated.
~ Fuel and cooling would be taken care of by the stock components on the motorcycle chassis, so those comonents could be eliminated from the LCR monocoque chassis.

You'd be able to use a seriously totaled liter class sportbike from a salvage yard as long as the engine/electrics were good and the frame/subframe was in good condition. The ability to mount up different liter class sportbikes would only be limited by availibility and development of bolt-on frame cradles. Much like LCR has off-the-shelf bolt-on engine cradles for a wide range of standard mfgr engine platforms for their chassis.

You'd be using the braking/suspension/traction of a F1/F2 design sidecar and the 'feel' of a standard motorcycle from a driving perspective. Most of all, it'd be street legal with a simple change of wheels and plastics.

In my above write-up, replace "LCR/ART monocoque chassis" with "my own monocoque design / inexpensive tube frame in replica dimensions". I use the LCR/ART chassis because it's much easier to visualise.
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The Bad Blog http://blog.badcatracing.com

[Paul]

LCR did a street project with Krauser that was somewhat similar to your proposal.... tube frame that held a BMW engine/transmission/rear wheel unit on the side. Something like that for a modern sport bike could be interesting....

http://www.michael-krauser.de/english/01_domani_e/dopo_e/dopo01_e.html

(This isn't the original Domani, it's a different unit).

[vintagegear]

There is a German craftsman who offers a platform independent chassis: http://www.schmidt-gespannbau.de/TRISIS/Galerie.htm

I believe this is the design philosophy behind the Mobec 'easydrive' as well: http://mobec-international.com/range/easydrive/index.php
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'To invent you need a good imagination and a pile of junk'.
Thomas A. Edison