Description
High Compression Crankshaft for Piaggio / Aprilia 50cc 2T Scooters
The full circle cranks do give a better filling of the cylinder thanks to the reduced space in the crankshaft casing.
The SSC racing bearings do sustain the hardest revving engine setup. The twice slotted con rod with silver cage bearings at the big end and two holes for lubricating the small end bearing gives the best grade of reliability.
The holes for balancing are filled with copper and alloy weights to get a ultra smooth running engine.
Bearings | |
---|---|
sizes: | 12x17x13mm |
Gudgeon pins | |
diameter: | 12 mm |
Crankshafts | |
stroke: | 39.3 mm |
thread rotor side: | M10x1,25 right-hand thread |
thread drive side: | M10x1,25 right-hand thread |
diameter crankwebs: | 70 mm |
width crankwebs: | 40 mm |
diameter bearing seat rotor side: | 20 mm |
diameter bearing seat drive side: | 20 mm |
diameter oil seal seat rotor side: | 19 mm |
diameter oil seal seat drive side: | 18 mm |
full circle crankshaft: | |
filling material for full circle: | steel |
material balancing weights: | aluminium |
diameter variator pivot: | 14.8 mm |
variator pivot type: | toothed |
can be used with genuine variator: | yes |
Connecting rods | |
length connecting rod: | 80 mm |
thickness connecting rod: | 4 mm |
diameter small end connecting rod eye: | 17 mm |
lubricating hole at small end bearing: | yes |
diameter crankpin: | 16 mm |
lubricating hole at crankpin bearing: | slot |
crankpin shims: | yes |