[Grant-53]

Price carbon fiber supplies at US Composites. Aluminum honeycomb is cheaper and bends rather cracking in a crash. I have yet to find a diesel engine under 200cc. Three derailleurs and 63 gears is overkill with many duplicate ratios. Price some trikes at bicycleman.com or any other reputable dealer. You can buy engine kits online or a commercial small engine, a centrifical clutch, and a #60 chain gear for the rear wheel. See Blue Sky Designs parts listings. I like internal gear hubs so I would get a Shimano 10 spd unit with a disc brake and weld a flat 22T sprocket to the larger chain gear. Add a tensioner if you need one. Pay attention to aerodynamics with a good fairing from Mueller or Zzipper and a tapered rear seat bag. If you shop around you should build a decent machine for $3,000 USD. I have a 23cc two-stroke chain saw engine (1 hp) that pushed my upright bike with a motorcycle windscreen to 25 mph on the level.