Description
Crankshaft
-MAZZUCCHELLI Racing (rotary valve)-
60mm Long Stroke
Vespa PX125, PX150
Description
In order to achieve higher speeds, one should reach for the racing shaft. The extended intake timing results in a much freer engine revs. This measure is especially noticeable with high-revving cylinders.
The quality of the crankshafts is very good and so they resist even the highest revs. Especially for engines with a larger displacement, they are an optimal supplement to extend the usable speed range.
These engines run out freely, which leads to a significant increase in top speed.
| Bearings | |
|---|---|
| sizes: | 15x19x20mm |
| Gudgeon pins | |
| diameter: | 15 mm |
| Crankshafts | |
| stroke: | 60 mm |
| thread rotor side: | M12x1,25 right-hand thread |
| thread drive side: | M12x1,5 right-hand thread |
| diameter crankwebs: | 98 mm |
| width crankwebs: | 38.6 mm |
| diameter bearing seat rotor side: | 25 mm |
| diameter bearing seat drive side: | 25 mm |
| diameter oil seal seat rotor side: | 24 mm |
| diameter oil seal seat drive side: | 31 mm |
| full circle crankshaft: | no |
| rotary valve crankshaft: | yes |
| length rotary crankweb: | 193 mm |
| Vespa PX125-150 - intake timing for long rotary surface (33mm) (°): | 172 |
| Vespa PX125-150 - intake timing for short rotary surface (53mm fully modified) (°): | 196 |
| crankcase has to be milled: | |
| engine casing has to be modified: | |
| Connecting rods | |
| length connecting rod: | 105 mm |
| thickness connecting rod: | 5.3 mm |
| diameter small end connecting rod eye: | 19 mm |
| lubricating hole at small end bearing: | no |
| diameter crankpin: | 20 mm |
| lubricating hole at crankpin bearing: | notch |
| crankpin shims: | yes |
| Model / manufacturer | cc | Type | Engine | Year of construction | Addition |
|---|---|---|---|---|---|
| LML Star 125 2T/ DLX / Via Toscana / Deluxe | 125 | 2T AC | |||
| LML Star 150 2T / DLX / Via Toscana / Star / Stella / Belladonna RV | 150 | 2T AC | |||
| MOTOVESPA 125 CL | 125 | 9CL | 2T AC | '78- | |
| MOTOVESPA 150 CL | 150 | 9NC | 2T AC | '78- | |
| VESPA 125 GTR | 125 | VNL2T | 2T AC | '68-'78 | 145901 -> |
| VESPA 125 TS | 125 | VNL3T | 2T AC | '75-'78 | 18139 -> |
| VESPA 150 Sprint Veloce | 150 | VLB1T | 2T AC | '69-'79 | 294260 -> |
| VESPA 150 Super | 150 | VBC1T | 2T AC | '65-'79 | 412374 -> |
| VESPA COSA 1 | 125 | VNR1T | 2T AC | '88-'91 | |
| VESPA COSA 1 | 150 | VLR1T | 2T AC | '87-'90 | |
| VESPA COSA 2 | 125 | VNR2T | 2T AC | '91- | |
| VESPA COSA 2 | 150 | VLR2T | 2T AC | '91- | |
| VESPA P125X | 125 | VNX1T | 2T AC | '77-'82 | |
| VESPA P150 S | 150 | VBX1T | 2T AC | '78-'90 | |
| VESPA P150X / PX150 E | 150 | VLX1T | 2T AC | '78-'85 | |
| VESPA PX125 2011/ 30 Jahre | 125 | ZAPM74100 | 2T AC | '11- | |
| VESPA PX125 CAT | 125 | ZAPM50100 | 2T AC | '07- | |
| VESPA PX125 E | 125 | VNX1T | 2T AC | '81-'83 | |
| VESPA PX125 E '98 / Millenium | 125 | VNX2T | 2T AC | '98-'05 | |
| VESPA PX125 E Lusso/EFL/Arcobaleno / Elestart | 125 | VNX2T | 2T AC | '83-'97 | |
| VESPA PX150 2011 | 150 | ZAPM74200 | 2T AC | '11- | |
| VESPA PX150 E '98 / Millenium | 150 | VLX1T | 2T AC | '98-'05 | |
| VESPA PX150 E Lusso/EFL/Arcobaleno / Elestart | 150 | VLX1T | 2T AC | '83-'97 |
