Minarelli Horizontal Crankshaft 10mm Pin – Racing 39.2mm
Minarelli Horizontal Crankshaft – 10mm Pin / 39.2mm Stroke
Ruizheng Racing supplies racing crankshaft assemblies for Minarelli Horizontal 50cc two-stroke scooter engine projects, with standard-stroke specifications and OEM/ODM customization.
- Stroke: 39.2mm (Standard)
- Connecting Rod: 80mm Center-to-Center
- Piston Pin: 10mm
- Small-End Bearing Size: 10 × 14 × 13mm
- Shaft Diameters: 20mm Ignition Side / 20mm Transmission Side
- Applications: Yamaha Aerox 50, Jog 50, MBK Nitro 50 and selected Minarelli Horizontal engines
- MOQ: 300 pcs
- Customization: OEM / ODM / Drawing-Based Manufacturing
B2B wholesale supply. Confirm engine compatibility and request a quotation before ordering.
Description
Minarelli Horizontal Crankshaft from Ruizheng Racing is a racing crankshaft assembly for 50cc two-stroke scooter engines, featuring a 10mm piston pin, 39.2mm standard stroke and 80mm connecting rod. This product is offered for B2B wholesale sourcing, performance engine projects and OEM/ODM customization, with a minimum order quantity of 300 pieces.
Common application references include Yamaha Aerox 50, Jog 50, MBK Nitro 50 and other scooters equipped with compatible Minarelli Horizontal two-stroke engines. Final compatibility must be confirmed by engine version, crankshaft dimensions and piston pin configuration.
Minarelli Horizontal Crankshaft Specifications
| Brand | Ruizheng Racing |
|---|---|
| Product Name | Minarelli Horizontal Racing Crankshaft |
| Product Type | Racing Crankshaft Assembly |
| Engine Platform | Minarelli Horizontal |
| Engine Type | 2-Stroke, Single Cylinder |
| Engine Application | 50cc / Selected Modified 70cc Projects |
| Crankshaft Stroke | 39.2mm – Standard Stroke |
| Crank Throw | 19.6mm |
| Connecting Rod Length | 80mm Center-to-Center |
| Piston Pin Diameter | 10mm |
| Small-End Needle Bearing Size | 10 × 14 × 13mm |
| Ignition Side Shaft Diameter | 20mm |
| Transmission Side Shaft Diameter | 20mm |
| Design Reference | Full-Circle / Reinforced Type – Final Configuration Subject to Approval |
| OEM/ODM Customization | Available for Technical Review |
| Minimum Order Quantity | 300 pcs |
| Pricing | Wholesale Quotation Required |
The 10 × 14 × 13mm value identifies the specified small-end needle bearing size. Bearing inclusion and the complete supply configuration must be confirmed before ordering.
10mm Piston Pin and 39.2mm Standard Stroke
This Minarelli Horizontal Crankshaft uses a 10mm piston pin specification and a 39.2mm standard crankshaft stroke. The connecting rod center-to-center length is 80mm, with a crank throw of 19.6mm.
These dimensions are commonly associated with standard-stroke Minarelli Horizontal 50cc two-stroke engine configurations. The 10mm piston pin version should not be confused with 12mm piston pin crankshafts available for other engine and piston configurations.
Before placing an order, buyers should verify the required piston pin diameter, connecting rod geometry, crankshaft mounting dimensions and bearing specifications using the original component or approved technical drawing.
Yamaha Aerox 50 and Other Scooter Applications
This racing crankshaft is intended for compatible Minarelli Horizontal two-stroke engine platforms. The following models are application references for technical verification rather than guaranteed direct-fit claims.
| Brand | Application References |
|---|---|
| Yamaha | Aerox 50, Jog 50, Jog R, Jog RR, Neo’s 50 |
| MBK | Nitro 50, Ovetto 50, Mach G 50 |
| Aprilia | SR50 2T – Compatible Minarelli Horizontal Engine Versions Only |
| Malaguti | F12 Phantom 50, F15 Firefox 50 |
| Benelli | 491 50, K2 50 |
| Beta | Ark 50, Eikon 50 |
| Italjet | Dragster 50 |
Not every model year or regional engine version uses the same crankshaft. In particular, some scooter families have been supplied with different engine platforms. Compatibility must be verified by the installed engine rather than the motorcycle model name alone.
Buyers should provide the exact model, year, engine identification and original crankshaft measurements before ordering.
50cc and Modified 70cc Engine Projects
This Minarelli Horizontal racing crankshaft is offered for standard-stroke 50cc applications and selected performance-modified 70cc engine projects.
For modified 70cc configurations, buyers must verify piston pin diameter, cylinder and piston requirements, connecting rod dimensions, crankcase clearance and the complete engine assembly.
A 70cc cylinder kit does not automatically guarantee compatibility with this crankshaft. The suitability of any modified engine combination must be confirmed independently before installation.
No specific maximum RPM, horsepower gain or durability rating is stated without verified application-specific testing.
Full-Circle and Reinforced Crankshaft Design
The supplied product information identifies a full-circle / reinforced-type crankshaft design. The final crank web structure, connecting rod construction, material grade, crank pin specifications and assembly tolerances must be confirmed from the approved product sample or technical drawing.
Crankshaft balancing, runout limits and inspection requirements can be reviewed as part of a defined OEM/ODM project. Marketing photographs do not replace dimensional inspection or production validation records.
OEM/ODM and Custom Minarelli Crankshaft Supply
Ruizheng Racing supplies motorcycle engine components for distributors, wholesalers, performance-parts brands and professional engine workshops.
For custom Minarelli Horizontal Crankshaft projects, customers may submit drawings, samples or complete dimensions for technical evaluation. Customization requirements may include crankshaft geometry, connecting rod specifications, piston pin configuration, logo marking and private-label packaging.
The standard product specification listed on this page uses a 39.2mm stroke and 10mm piston pin. Other requested specifications are treated as separate custom projects and require approval before production.
Explore our Racing Motorcycle Crankshaft Collection or learn more about our OEM/ODM Motorcycle Engine Parts Services.
B2B Wholesale Orders – MOQ 300 pcs
The minimum order quantity for this crankshaft product is 300 pieces. Ruizheng Racing welcomes wholesale enquiries from motorcycle parts importers, distributors, aftermarket brands, racing workshops and engine-parts businesses.
Pricing is provided after confirmation of the crankshaft configuration, required quantity, branding and packaging specifications. This product is not offered through individual retail checkout.
Minarelli Horizontal Crankshaft FAQ
What piston pin size does this crankshaft use?
The listed product uses a 10mm piston pin. Buyers requiring a 12mm piston pin must request a separate specification review.
What is the crankshaft stroke?
The standard crankshaft stroke is 39.2mm, with a corresponding crank throw of 19.6mm and an 80mm connecting rod.
Does this crankshaft fit a Yamaha Aerox 50?
Yamaha Aerox 50 is a main application reference. Final fitment requires confirmation of the installed Minarelli Horizontal engine version, crankshaft dimensions and piston pin requirements.
Can this crankshaft be used with a 70cc cylinder kit?
Selected modified 70cc projects can be reviewed. Compatibility depends on the complete engine configuration and must be confirmed before installation.
Is the 10 × 14 × 13mm needle bearing included?
The listed dimension is a bearing size specification. Whether the bearing is supplied with the crankshaft must be confirmed in the final quotation.
Can Ruizheng Racing customize the crankshaft?
Yes. Ruizheng Racing supports drawing-based and sample-based OEM/ODM crankshaft project reviews. Final specifications and production feasibility require approval.
What is the minimum wholesale order quantity?
The MOQ is 300 pcs. Please provide your required quantity, company details and destination country when requesting a quotation.
Request a Minarelli Horizontal Crankshaft Quote
Looking for a Minarelli Horizontal Crankshaft supplier for your motorcycle parts business? Send Ruizheng Racing your model, engine version, required 10mm piston pin configuration, purchase quantity and customization requirements.
