What it looks like is a nicely done BMW sidecar rig, what it is, is a beautifully crafted, 325 horsepower twin turbo rotary engine powered sleeper, ready to embarrass the unwary. Of course the wheelie bar might give you a hint. Rotohak, the creation of builder Bob Pelikan, is subtle and deceptive, that valve cover jutting through the fairing is a fake.
Rotohak began way back in 1993, when Bob put it together with a normally aspirated Mazda RX7 engine which powered both the sidecar wheel and rear motorcycle wheel through a VW automatic transmission. It looked like a BMW K100 and sidecar, only a close inspection revealed the secret. Bob rode the rig for several years and in 1998, sold it with the agreement he would have right of first refusal if the new owner decided to sell.
In 2001, he got his chance and Rotohak was back in Bob’s garage. He figured it was time to freshen things up a bit and he found a sequential twin turbo intercooled Mazda Cosmo engine at a local Japanese engine importer. This Japanese market only engine puts out 325 horsepower, the Cosmo is sort of a Japanese musclecar. (Bob’s website gives 2 different hp numbers, I chose the lower one but who knows?)
Bob bought a lot of R1150RT body parts which he grafted to the old K100 and fitted a 16 gallon marine gas tank where the engine would normally be and hooked it up to the normal filler cap. The rotary engine sits in the sidecar trunk leaving room for a passenger, too. A lot of fiberglass work, copious amounts of aluminum polishing and a seat from Corbin complete the Rotohak. Except for the hefty muffler, a somewhat different exhaust note and telltale wheelie bar, you might never suspect.
Projects like this are cool. Great performance, good looks and civilized manners, … until you twist the throttle hard. Neat!
Thanks for the tip, Ted!
More photos below:
This in progress photo gives a better idea of where it all fits
Related: Mazda Rotary Powered Motorcycle