Safety Bars

Jawa motorcycle crash bars with oil reserve

I want to share my version of making crash bars, which I installed on a Jawa motorcycle and which have been serving reliably for more than a year now. Fellow motorcyclists became interested in their design: they took measurements, the shape, and so on. So I decided to offer them to the magazine’s readers. Many Read more…

Bearings for a Bicycle Generator

Bicycle dynamo upgrade: ball bearings instead of bushings

Some models of the bicycle electric generator, better known as a “dynamo,” have serious design flaws. For example, the plain bearings in which the rotor shaft rotates need periodic lubrication. And their design is inconvenient to disassemble. Once the lubricant is depleted, increased friction appears, along with wear of the bearing bushings and of the Read more…

Pedals for Champions

Bike drive with automatically extending pedal levers

The bicycle is probably the most widespread means of transport. And there is no doubt that it is also the most economical: two buttered sandwiches are enough to pedal for two hours. But can the efficiency of the human “engine” be increased? Reducing “fuel” consumption will not help. Friction and the weight of the machine Read more…

Muffler — a not simple device

Homemade car muffler: triangular prism design

Interest in homemade mufflers is driven primarily by the unsatisfactory quality of series products. It is quite natural for an amateur designer to want to improve the parameters of their vehicle. Of course, it is practically impossible to significantly increase engine power through a muffler at a given exhaust noise level, but eliminating some shortcomings Read more…

Motorcycle essentials

Motorcycle upgrades: carburetor, tank and luggage box

At first glance, these are just trifles that mean nothing. In fact, much in our lives (if not everything) is decided by them — though in different ways, depending on what kind of trifles they are. Some, for example, may affect no more than a person’s mood, while others can even change the fate of Read more…