Precision components / Crankshaft
Vespa 300 Crankshaft Assembly
Supplier-listed Vespa and Piaggio-group 300 scooter applications
- Standard stroke reference
- 63 mm
- Crank throw reference
- 31.5 mm
- Piston pin diameter reference
- 16 mm
View applications & fitment. Custom stroke available; specify your required dimensions.
At a glance
Key specifications
Supplier-provided references. Final custom configurations must be agreed. See the complete technical specifications below.
Engineering data
Technical specifications
Dimensions & geometry
- Cylinder bore reference
- 75 mm (engine reference, not crankshaft journal diameter)
- Standard stroke reference
- 63 mm; custom stroke available, final ordered stroke to be agreed
- Crank throw reference
- 31.5 mm for the supplied standard configuration; not a fixed value for custom-stroke builds
- Piston pin diameter reference
- 16 mm; piston pin, not crank pin
- Crankshaft main journal diameter
- Approximately 29 mm; tolerance grade and final journal dimensions require confirmationProject confirmation required
Application & supply
- Brand
- Ruizheng Racing
- Product name
- Vespa 300 Crankshaft Assembly
- Product type
- Complete Crankshaft with Connecting Rod
- Engine platform reference
- Piaggio Quasar 300 / HPE 300
- Engine displacement reference
- 278 cc / 278.3 cc (supplier-provided platform reference)
- Engine type reference
- Single-cylinder, 4-stroke, 4-valve
- Cooling system reference
- Liquid-cooled
- Customization
- Custom stroke available; required stroke to be specified for quotation
- MOQ
- 300 pcs
Specification source & technical context
Vespa 300 crankshaft assembly with connecting rod, supplied by Ruizheng Racing for B2B orders. MOQ: 300 pcs. Custom stroke is available. The 63 mm standard stroke and 31.5 mm crank throw are supplier-provided reference values; specify the required stroke and engine version for your order.
Detailed product images
Supplier product graphic showing the listed platform and custom-stroke availability; confirm the ordered engine version.
Supplier standard reference: 63 mm stroke, 31.5 mm crank throw and 16 mm piston pin. Custom configurations differ; displacement refers to the engine.
General equipment reference
General supplier equipment reference only. This image does not establish production, inspection results or certification for this product.
Supplier-provided inspection-equipment scene; no measured result or certification is claimed.
Supplier-provided applications
Applications & fitment
Supplier-listed Vespa and Piaggio-group 300 scooter applications
- Vespa GTS 300
- Vespa GTS 300 Super
- Vespa GTS 300 SuperSport
- Vespa GTS 300 SuperTech
- Vespa GTS 300 HPE
- Vespa GTV 300
- Piaggio Beverly 300 i.e.
- Piaggio MP3 300
- Piaggio Carnaby 300
- Aprilia Sportcity Cube 300
- Aprilia SR Max 300
- Gilera Nexus 300
- Derbi Rambla 300
Please confirm your engine version and installation dimensions before ordering. Model years and exact engine codes were not supplied; no all-version interchangeability claim is made.
OEM / Customization
Your project requirements.
Custom stroke available. Specify the required stroke and engine version for quotation; the available stroke range and final assembly dimensions are project-specific.
Related products
Related components, not a claim of interchangeability.
Before you order
Frequently asked questions
What is the minimum order quantity?
The stated MOQ is 300 pcs. Include your quantity and required stroke in the quotation request.
Can the crankshaft stroke be customized?
Yes. Custom stroke is available according to the supplied product information. Specify the required stroke and engine version; the available range, assembly clearances and final dimensions must be agreed for the project.
Do 63 mm stroke and 31.5 mm crank throw apply to every custom order?
No. These are the supplier-provided standard reference values. They are not fixed dimensions for all custom-stroke builds. The 278 cc / 278.3 cc displacement and 75 mm bore are engine-platform references, not guaranteed displacement after modification.
Which applications are listed?
The supplier lists the 13 Vespa and Piaggio-group model entries in Applications & Fitment. Please confirm your engine version and installation dimensions before ordering. No all-year or all-version interchangeability is claimed.
Is approximately 29 mm an exact main-journal specification?
No. The supplied information states approximately 29 mm with tolerance grades. Final journal dimensions and the required grade must be confirmed against the engine or drawing. The listed 16 mm dimension refers to the piston pin, not the crank pin.
What should I provide for a quotation?
Provide Vespa 300 Crankshaft Assembly, quantity (MOQ 300 pcs), required stroke, exact model and engine version, installation dimensions, destination market and drawings or samples if available. Enter the required stroke in the RFQ requirements field.
Start your specification review
Request a Quote
Tell us your required stroke, engine version and assembly requirements. MOQ: 300 pcs.
Request a QuoteThe RFQ requirements field includes a custom-stroke entry prompt. No unconfirmed stroke options are offered.