I don't do it anymore because the government where i live has banned all liquid fueled motorised bicycles.
Up until the point that they put the ban in place, i was travelling around 300 Km per week; around 185 miles doing all manner of things: picking up firewood along walking trails and transporting it home in the trailer train, general recreation as well as using the bike to get me to and from work.
The bike is fitted with a 9 inch Hayes V9 disk brake on the front wheel and a 6 inch disk on the rear wheel.
It provides plenty of stopping power.
The tyres are Schwalbe 26 x 2.125 Marathon Plus combined with puncture proof tyre liners. I have never had a puncture in the 5 years that i have ridden the bike.
On average, the replacement service life of the cylinder was 4,000 kilometers (2500 miles) and the bottom end had a replacement service life of 10,000 kilometers (6,200 miles) running the engine on premium non ethanol fuel and 25:1 oil fuel ratio with a self imposed 4,800 rpm rev limit but the normal rpm zone was 3,000 to 3,800 rpm where it produced maximum torque spread.
In the video, you can get an idea of the way the engine was set up to provide low and midrange torque; not requiring high rpm to make power. From personal experience, the crowded rolled bearing crankshaft setup proved to be very reliable but the caged needle roller bearing crankshaft design was only good for 4,000 kilometers before failure (2,500 miles).
As soon as the bike was revved over 5,000 rpm, the crankshaft suffered failure within 300 kilometers (185 miles). Maybe the crankshafts are better made these days but it looks like they are still using the same design.
The maximum load hauled by the bike is around 200 kilos or 450 pounds with the 6 trailer setup. The old girl was in low range and working her heart out climbing hills.
