Product Details
Description
NCY crankshaft Wrist Pin Bearing (12mm); For1100-1360 is an OEM-style replacement crankshaft assembly for compatible 139QMB scooter engines.
Replacement Part Details
Use this part when the original component is worn, damaged, missing, or no longer working correctly. Many scooter parts can look similar but use different sizes, plugs, brackets, thread patterns, or mounting styles, so careful comparison before purchase is recommended.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Code: 139QMB
- Fitment Notes: OEM
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a 139QMB engine?
A: This SKU is listed as compatible with 139QMB engine-code fitment. Always compare your original part and scooter details before ordering.
Additional information
| Weight | 0.3 lbs |
|---|---|
| Dimensions | 5.5 × 3.5 × 1 in |
The NCY 12mm Wrist Pin Bearing is the correct replacement small-end bearing for NCY big bore kit 1100-1360. Designed to fit the 12mm wrist pin used in that piston assembly, it is compatible with horizontal Minarelli-based and other compatible 50cc platforms.
- 12mm wrist pin bearing for NCY big bore kit 1100-1360
- Compatible with horizontal Minarelli-based 50cc engines and other platforms using the 1100-1360 piston assembly
- Needle/roller bearing construction for low-friction, high-load performance
- Replace at every top-end rebuild alongside the piston, rings, and gaskets
- Sold individually
| Spec | Detail |
|---|---|
| Wrist Pin Diameter | 12mm |
| Bearing Type | Needle/Roller |
| Compatible Kit | NCY Big Bore 1100-1360 |
| Engine Platform | Horizontal Minarelli 50cc |
| Sold As | Individual |
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