A new build from Spain?s Bolt Motor Co. is always a treat. The Valencia-based workshop has a history of high-end racecar preparation, and they like to eke out maximum performance from their two-wheeled builds as well.
Shop owner Adrián Campos has a particular affinity for BMW airheads, and his latest creation is based on a 1981 R100RT. That was the touring version of the RS, and in its day, the most expensive production motorcycle you could buy in the States.

Bolt have treated this forty-year-old model with respect. The air-cooled 980cc boxer twin has been completely rebuilt and heavily modified, with a twin-spark conversion allowing higher compression pistons and a stronger power output.
Breathing is now via Mikuni carbs rather than 40mm Bings, with gases exiting via straight 2-into-1 pipes ending in a Spark muffler. A Siebenrock Deep Sump Conversion Kit ensures a plentiful supply of oil for cooling.
You just know this engine will run as sweet as a nut?because Adrián?s former race engineer Juan Fernandez built it. (Juan has also worked for the Mahindra Formula E championship team, so he handled all the electrics on the BMW too.)
The rest of the mods are a little more unusual. ?On the mechanical side, we installed a hydraulic clutch,? Adrián says. ?It?s something rare to see on these models. It?s a kit, but we had to make modifications to the gearbox to adapt it.?

That sounds challenging enough, but the worst was yet to come: Bolt installed the die-cast single...