We were busy during winter constructing new crankshafts, and here they are
Crankshaft -BGM Pro Racing full circle 51mm stroke, 105mm conrod- Vespa PK125 XL2, ETS125
Crankshaft -BGM Pro Racing full circle 54mm stroke, 105mm conrod- Vespa PK125 XL2, ETS125
The power of the newest generation of smallframe cylinders is amazing, and kills most parts of the rest of the engines. The developers at BGM constructed bigger crank webs which are not prone to twisting and cracking, because of a larger overlap and superior material..
In order to fit the larger diameter crank webs (87 mm on the flywheel side and 86 mm on the drive side) you have to machine the casings to 88 mm.
The next innovative feature is the piston rod length which has been increased to 105 mm (8 mm longer than on standard 125 cc Smallframe cranks). The crank is a perfect fit to some of the latest Smallframe tuning kits that are designed to be run with this sort of piston rod
An easy way to use it with every other barrel available, is to fit the 8 mm bgm spacer (BGM0223) and longer cylinder stuts (BGM 0290). Also available as complete kit (7673185).Upshot: a better angle, which is perfect for the life of the big end bearing and reduced friction of the piston in the bore hole.
This results in better power and reduced primary compression, which work well with the modern day exhausts, such as the ones made by manufacturer Ludwig and Scherer, as the port transfers at the casing can be improved and the flow optimized.
Main features are the very strong CNC-maschined Rod, which is superior to most rivals, and the durable ETS spigot on the ignition side, which can be fitted to all V50/90/Primavera engine cases as well, using our special seals and bearings. A perfect solution to cracking tapers and blown ignitions.
And here is another part we were looking for, for a long time.
Crankshaft -BGM Original- Vespa PK125 XL2, ETS125
The label BGM is known for high quality scooter products. Crank shafts of BGM work in many tuned road and race engines. With this nice build crank shaft BGM closes the gap for rotary driven smallframe cranks. It is technically orientated on the original Vespa ETS crank shafts, but is supplied with high quality elements, like the overlap against twisting, a well build piston rod with good lubricating holes and strong crank webs. The The PK XL2, ETS 125 has the most solid taper of the Vespa Smallframes. Therefore it is capable to sustain much higher forces. An additional feature is that it can be used with the ultra light flywheels for much improved acceleration and power output.
Crankshaft -RACING- Vespa PX 80
And here we have a special solution for the german Vespa PX 80. Italian manufacturers have build a special racing crank to go with the tuning cylinders like the Malossi 139, DR 135 and the likes. Nice quality and functionality.
