Ditch your soft, clapped-out stock tubes and transform your front-end tracking with the premium NCY Performance Front Fork Assembly. Engineered specifically for Yamaha Jog architectures and matching 139QMB platform variants, these high-performance stanchions feature sports-tuned internal damping rates that dramatically diminish nose-dive under heavy braking. Finished in a high-gloss silver coating, this complete leg set stabilizes your tracking through high-speed turns � ensuring a crisp, confidence-inspiring ride on both street commutes and race setups.
Advanced Suspension Features
- Sports Damping Optimization: Calibrated to deliver a stiffer, more predictable spring and rebound rate than mushy factory originals � providing better tire contact and road feedback.
- Flawless 26mm Tube Profile: Precision ground to a 26mm outer stanchion diameter, sliding perfectly into compatible stock or aftermarket triple trees.
- Disc Brake Ready Geometry: Features integrated structural mounting tabs cast directly into the lower leg to support standard hydraulic disc brake calipers.
- Complete Setup Kit: Ships as a matched pair (left and right legs) and includes two premium stainless steel hose/line clamps for a professional garage install.
Comprehensive Fitment & Model Guide
These forks are engineered strictly for 10mm front axle pins and front hydraulic disc brake configurations. Please check your exact model below:
| Make / Manufacturer | Model Platform Fitment | Engine Type & Exclusions |
|---|
| Yamaha | Jog 50 (Disc Brake Variant) | 50cc 2-Stroke Minarelli (Horizontal/Vertical) |
| Chicago Scooter Co. | go / go MAX / Pug 50 / Bella Classic 50 / Nitro Sport 50 | 50cc / 80cc 4-Stroke (GY6 139QMB Layouts) |
| Eton | Beamer 50 / Beamer II / Beamer III | 50cc 2-Stroke Air-Cooled Variants |
| Chinese GY6 Generics | 139QMA, 139QMB, YN139QMB, JJ1P39QMB, BD1P39QMB | Fits wide-ranging 10" and 12" wheeled disc setups |
CRITICAL FITMENT NOTE: This assembly will NOT work on Yamaha Zuma 50F (4T), Zuma "Prebug" (1989�2001), or Zuma "Bugeye" (2002�2011) 2-stroke models due to completely different axle, steering stem, and brake offset requirements.
Technical Specifications
- Stanchion Tube Outer Diameter: 26mm
- Axle Diameter Fitment: 10mm
- Brake Configuration: Disc Brake Only
- Overall Structural Length: 385mm
- Clamping Surface to Center-Axle Length: 350mm
- Finish: High-Gloss Silver Protective Coating
- Country of Origin: Taiwan
About NCY
NCY is the aftermarket performance parts leader for most popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, Kymco, and GY6/QMB-powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified. Performance upgrades are considered racing parts and are not covered by warranty.
SKU: 1000-1373 | Vendor: NCY | Category: Wheels & Suspension / Front Forks
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