NCY Performance Camshaft; 139QMB
NCY Performance Camshaft; 139QMB
$67.72
10 in stock
*Note: Free shipping to U.S. mainland (excludes AK, HI, and territories)
Orders placed by 1pm EST on weekdays ship the same day.
Product Details
Description
NCY Performance Camshaft; 139QMB
Compatibility
Fits many 139QMB-based 50cc / 80cc scooter engines. Confirm measurements, connector style, and engine family before ordering.
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 Size: 50cc, 80cc
- Engine Code: 139QMB
- Fitment Notes: Performance
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.
Q: Is this for 50cc scooters?
A: This SKU is listed with 50cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 0.687 lbs |
|---|---|
| Dimensions | 3 × 2 × 2 in |
| Condition | New |
|---|
Unlock the hidden power potential of your 4-stroke scooter with the NCY Performance Camshaft. Designed specifically for the GY6 139QMB engine platform, this high-lift cam profile increases valve duration and lift, allowing your engine to breathe deeper and rev higher. This is the recommended essential upgrade whenever you install a 72cc, 82cc, or 100cc big-bore cylinder kit to ensure your engine can fully utilize the increased displacement.
By optimizing the intake and exhaust timing, this camshaft shifts your power band upward, resulting in significantly improved acceleration and higher top-end performance.Â
Product Features
- Optimized Lobe Geometry: Increased lift and duration profiles significantly improve volumetric efficiency compared to restrictive OEM stock cams.
- Precision-Machined Sprocket: Includes a factory-indexed 34-tooth timing sprocket for precise valve-to-piston synchronization.
- Hardened Steel Core: Constructed from high-strength, wear-resistant steel to withstand the sustained high-RPM heat and stress of modified performance builds.
- Plug-and-Play Fitment: Designed for drop-in installation into stock 139QMB cylinder heads (no machining required).
Technical Specifications
- Intake Lobe: 25.8mm x 21mm x 10.3mm
- Exhaust Lobe: 25.5mm x 21mm x 10.2mm
- Sprocket Teeth: 34
- Bearings: 2 TPI #16002C3 (18x32x8mm)
- SKU Reference: 1100-1250
Comprehensive Engine Fitment Matrix
This camshaft is a direct fit for 139QMB-based 50cc, 72cc, 82cc, and 100cc 4-stroke engines using the following factory designations:
| Engine Series Code | Compatible 139QMB / GY6 50cc Variants |
|---|---|
| Common Codes | 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ139QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD |
This product is intended for off-road use only.
This product is not intended for use on public roads or land.
This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.
*Performance upgrades are considered racing parts and are not covered by warranty.
