Crankshaft, connecting rod assembly long race for DERBI euro 3

Here you will find crankshafts has long race for DERBI euro 3 for motor bike 50cc DERBI SUPERMOTARD, ENDURO, DRD X-RACE, RIEJU, BETA RR YAMAHA DT, MBK X-LIMIT, XP6, Aprilia RX, MX, SX. .. and many other models. Remember, the crankshaft has long run increase the engine displacement. They are not approved, they offer a clear increase in power and torque! They can be mounted on cylinders specially designed for a long run, but also on kits 70cc or 80cc standard, with a wedge ... If diagrams allow. Here are some ideas: original -Course crankshaft derbi euro 3: 40.00mm original rod -Size: 90mm -Ø silk / worn Original roll: Ø20mm -Cage to original needle: Ø12mm X Ø15mm X Length 15mm a 47mm diameter cylinder with an original race 40mm provides the engine displacement 69,39cc and operation is very far from the square called race. A 47mm diameter cylinder with a 43mm long stroke provides the engine displacement 74,60cc and operation comes a little more than the so-called square race. A 47mm diameter cylinder with a 45mm long stroke provides the engine displacement 78,07cc and operation is very close to the square called race. Remember that a cylinder which is scheduled for a 40.00mm before being placed on a long race course must be verified, he will receive a hold of 1.5mm for a 43mm stroke for example, or a block of 2mm for a race 44mm ... and so on. The diagrams must therefore be higher! We must therefore look at the basic diagrams with standard 40.00mm race. Diagrams not to exceed are around 135/195 ° to keep a usable engine. The squish should also be checked, and for proper operation, planning work on the down lights so that the piston opens at BDC (bottom dead center)!