Crankshaft, connecting rod assembly MAZZUCCHELLI 42mm long stroke (Ø17mm bristles) for mécaboite minarelli P4 & P6

Attention, this crankshaft increases the engine displacement, it is in no way approved or authorized on the road. New with us!

Here is the MAZZUCCHELLI crankshaft 42mm stroke.

This crankshaft in this 42mm long stroke will allow you to directly increase your engine displacement regardless of the high engine you install. However, be careful, switching to a long stroke increases the diagrams, so do not install a kit that has very large diagrams in 39mm stroke on a 42mm stroke under penalty of obtaining unusable diagrams. We totally advise against switching to a 50cc kit (d.40mm) in long stroke, you would turn in hyper race….



In short, the 42mm stroke if it is well accompanied will prove to be a very big gain in torque and performance. If you want to put it on a kit for normal racing as you need to provide a 1.5mm shim! To best plan to align the lights at bottom dead center, you also need to check the diagrams during assembly. Apart from that, this crankshaft remains quite correct in relation to its price, the masses are full for more pre compression, a balancing is carried out digitally….



The finish is good, the connecting rod and the steels used are top of the range. The small end cage is also revised upwards for more strength.

Information:

-Course: 42.00mm against 39.00mm for the origin
- To be mounted with: kit for 42mm stroke or 1.5mm shim under the cylinder
-Soies: Ø17mm like the original, to be mounted with suitable bearings.
- Needle cage size: Ø12mm by Ø15mm by L15mm
Masses: semi-solid in Ø76mm