Pressing out, aligning, fine balancing, customizing of eccentric crank pins. For racing, the crank pin is laser-welded in order to ensure a rotational stability of the two crankshafts relative to each other.
The crankshaft is certainly an important if not the most important component of a two-stroke engine. Especially with Vespa and Lambretta engines there are many possibilities of modification.
There are hundreds of different connecting rod kits with as many different sizes.
There are extensive lists of dimensions and model names. We have many common rod sizes available.
We provide a new rod kit according to the model, but also to measure. If a connecting rod is needed for a conversion, it often has to be reworked.
These revisions are also carried out. Likewise, we stock all the common connecting rod bearings for the lower crankpin, all standard piston pin bearings (10, 12, 13, 14, 15, 16, 18 mm), many thrust pins and thrust washers.
Eccentric crank pins
A small treat for all tuners is the eccentric crank pins. They are specially made and increase the crankshaft stroke by their eccentricity. In principle, it is possible to incorporate such a crankpin into each crankshaft. In most cases, however, a different connecting rod must be used because the lower connecting rod diameter must be larger than in the original state (to get the lower bearing cage on the eccentric pin) because of the eccentricity of the bolt. In addition, in 95% of the cases, the crankcase must be spindled internally so that the connecting rod does not grind inside.