Racing crankshaft for Simonini racing engine gearbox for your Piaggio Ciao, Si, Bravo and Boxer moped / moped.
This full cheek racing crankshaft from Mazzucchelli is one of the best crankshafts currently available on the market.
The perfect workmanship and the use of high-quality materials guarantee reliable running at speeds of up to 16,000 rpm.
The solid connecting rod with a 12 mm piston pin is also designed for the highest loads.
Attention: This crankshaft can only be used in conjunction with the Simonini Racing engine case. It is also only suitable for special conversions, as the stroke is 44 mm. The original Simonini crankshaft for use in the Simonini housing has a stroke of 46 mm.
Connecting rod eye (A): 15.0 mm
Ø bearing seat right (B): 15.0 mm
Ø bearing seat center (C): 15.0 mm
Stroke (2xD): 44.0 mm
Sleeve length (E): 87.0 mm
Width of crank webs (F): 32.9 mm
Outer diameter of crank webs: 74.0 mm
1st shoulder (G): 21.0 mm
2nd shoulder (H): 44.0 mm. Heel (H): 44.0 mm
3. Heel (I): 63.5 mm
Total length crankpin end (J): 90.0 mm
Ø Vario / clutch pin (H): 12.0 mm
Dimension needle bearing: Ø 12 / 15 x 14.7 mm (axe 12)
Thread: M8 x 1.25 mm
No shim needs to be inserted between the racing crankshaft and its main bearings for installation.
Quality product from the Italian manufacturer Mazzucchelli.
| Manufacturer | Mazzucchelli |
| Cheek type | Full cheeks |
| Crankshaft stroke | 44 mm |
| Ø coupling pin / vario pin | 12 mm |
| Connecting rod length center-center | 87 mm |
| Number of gears | 1 pcs |
| Total length crankpin ignition side | 90 mm |
| Ø Connecting rod eye | 15 mm |
| Ø piston pin (B) | 12 mm |
| Ø Bearing seat (clutch side) | 15 mm |
| Ø Bearing seat (ignition side) | 15 mm |
| Thread type | MF8x1 (fine pitch thread) |
| Dimension needle bearing | 12 / 15 x 14.7 mm (axe 12) |
| Area of application | Racing |
| Wide crank webs | 32.9 mm |
| Length 1st paragraph | 21 mm |
| Length 2nd paragraph | 44 mm |
| Length 3rd paragraph | 63.5 mm |
| Piaggio | Ciao - P , SC , PX , C24 Si Bravo / Super Bravo Boxer Grillo |
Ratings
Accessories & related products
Simonini 47.6 mm cylinder | Piaggio Ciao, SI, Bravo, Boxer
Nominal diameter: 47.6 mm · Manufacturer: Simonini · Material: Aluminum · Surface: sandblasted · Displacement: 100 ccm · Crankshaft stroke: 46 mm · Ø piston pin (B): 12 mm · Outlet type: slanted · Number of fixing points: 4 pcs · Hole pattern [mm]: 50 x 50 · Camouflaged: No · Area of application: Tuning
CHF 299.90
Simonini 47.6 mm cylinder kit 12 mm KoBo | Piaggio Ciao, SI, Bravo, Boxer
Nominal diameter: 47.6 mm · Manufacturer: Simonini · Material: Aluminum · Surface: sandblasted · Displacement: 100 ccm · Crankshaft stroke: 46 mm · Ø piston pin (B): 12 mm · Outlet type: slanted · Number of fixing points: 4 pcs · Hole pattern [mm]: 50 x 50 · Camouflaged: No · Area of application: Tuning
CHF 549.90
Simonini crankshaft 46 mm stroke (12 KoBo) | Piaggio Ciao, SI, Bravo, Boxer
Manufacturer: Simonini · Cheek type: Full cheeks · Crankshaft stroke: 46 mm · Ø coupling pin / vario pin: 12 mm · Connecting rod length center-center: 90 mm · Total length crankpin ignition side: 90 mm · Ø crank webs: 74 mm · Ø piston pin (B): 12 mm · Ø Connecting rod eye: 16 mm · Bearing seat right: 15 mm · Ø Bearing seat (ignition side): 15 mm · Thread type: M8x1.25 (standard thread) · Dimension needle bearing: 12 / 16 x 12.7 mm (axe 12) · Wide crank webs: 33 mm · Length 1st paragraph: 21 mm · Length 2nd paragraph: 44 mm · Length 3rd paragraph: 63.5 mm · Area of application: High End
CHF 269.90
Mazzucchelli crankshaft 44 mm stroke for Simonini housing (10 KoBo) | Piaggio Ciao, SI, Bravo, Boxer
Manufacturer: Mazzucchelli · Cheek type: Full cheeks · Crankshaft stroke: 44 mm · Ø coupling pin / vario pin: 12 mm · Connecting rod length center-center: 87 mm · Total length crankpin ignition side: 90 mm · Ø piston pin (B): 10 mm · Ø Connecting rod eye: 13 mm · Ø Bearing seat (clutch side): 15 mm · Ø Bearing seat (ignition side): 15 mm · Thread type: MF8x1 (fine pitch thread) · Dimension needle bearing: 10 / 13 x 14.2 mm (axe 10) · Wide crank webs: 32.9 mm · Length 1st paragraph: 21 mm · Length 2nd paragraph: 44 mm · Length 3rd paragraph: 63.5 mm · Number of gears: 1 pcs · Area of application: Racing
CHF 194.90
Explore categories from Engine block
Moped fans also bought
Magura gas cable clamp / deco cable clamp Ø 5 x 6 mm
Drive: Slot · Manufacturer: Magura · Material: Brass · Material: Steel · Surface: nickel-plated · Number of components: 2 pcs · Ø outside: 5 mm · Ø Cable bushing: 1.6 mm · Screw head: Lens head · Thread type: M4x0.7 (standard thread) · Total length: 6 mm · Thread length: 4 mm
CHF 2.00
Fortune / Merrick 2.00-2.25 x 16" / 17" inner tube
Manufacturer: Fortune · Tire width: 2 - 2.5 " · Tire width: 2.25 - 2.5 " · Tire width: 2.5 " · Tire width [mm]: 50.8 - 63.5 · Width: 2 " · Width: 2 1/4 " · Width: 2 1/2 " · Wheel size: 16 - 17 " · Wheel size: 17 " · Tire height [%]: 100 · Old designation: 20 x 2 " · Old designation: 20 x 2.25 " · Old designation: 20 x 2.5 " · Old designation: 21 x 2 " · Old designation: 21 x 2.25 " · Old designation: 21 x 2.5 " · Valve type: TR4 Auto valve
CHF 10.50
EBR standard fork black | Piaggio Ciao
Manufacturer: EWC · Material: Steel · Color: black · Surface: varnished · Adjustable: No · Ø outer head tube: 25.5 mm · Ø head tube inside: 21 mm · Head tube length: 200 mm · Fork bridge - center wheel axle: 355 mm · Thread type: FG25.4 (1" 24G) · Thread length: 58 mm · Total length: 580 mm
CHF 108.90
Cable set black | Piaggio Ciao, SI, Bravo, Boxer
Manufacturer: Made in Germany · Material: Steel · Color: black · Quantity: 4 pcs · Ø Stranded wire: 1.25 mm · Ø Stranded wire: 1.5 mm · Ø Stranded wire: 1.8 mm · Total length: 1350 mm · Total length: 1600 mm · Total length: 2180 mm · Outer shell length: 1200 mm · Outer shell length: 1250 mm · Outer shell length: 1300 mm · Outer shell length: 2000 mm · Nipple shape: Ball · Nipple shape: Barrel (transverse) · Nipple shape: Pears
CHF 19.90
Polini jet set (120 - 138) main jets long version CP, Keihin, Koso, PWK
Manufacturer: Polini · Component group Carburetor: Spraying · Material: Brass · Quantity: 10 pcs · Carburetor type: CP · Carburetor type: Coso · Carburetor type: Keihin · Carburetor type: PWK · Nozzle type: Main nozzle · Nozzle size: 120 · Nozzle size: 122 · Nozzle size: 124 · Nozzle size: 126 · Nozzle size: 128 · Nozzle size: 130 · Nozzle size: 132 · Nozzle size: 134 · Nozzle size: 136 · Nozzle size: 138 · Drive: External hexagon
CHF 39.90
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
