NCY Gear Set (15*38); GY6 150cc
NCY Gear Set (15*38); GY6 150cc
$69.69
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: GY6 Upgear kit. 7.6% upgear. 50 ton gear press required for install. Get the most out of your big bore kit, with increased top speed and a more usable rev range.20mm W x 20mm I.D
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 150cc, GY6
- Fitment Notes: Big Bore
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: Is this for 150cc scooters?
A: This SKU is listed with 150cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 0.959 lbs |
|---|---|
| Dimensions | 8 × 4.5 × 2 in |
Unlock more top speed and a more usable rev range from your GY6 engine with the NCY 15?38 Up-Gear Kit. This gear set delivers an 18% increase in final drive ratio over the stock 13?40 setup — the ideal companion for a big bore kit or any build chasing higher top-end performance. ISO 9001 certified and made in Taiwan by NCY since 1997.
Installation Note: You must reuse the stock 42-tooth counter shaft gear. A 50-ton gear press is required for installation.
- Front Counter Shaft: 15 teeth | Spline L: 24mm | OD: 31.1mm | Overall L: 60mm
- Gear Press-On Area: L: 12.08mm × OD: 19.08mm | Ends L: 9–10.5mm × OD: 15mm
- Rear Final Drive Gear: 38 teeth | Inner Spline: 19
- Rear Gear Dimensions: OD: 71.2mm | ID: 18mm | W: 20mm
- Ratio Increase: 18% over stock 13?40
- Origin: Made in Taiwan by NCY (ISO 9001)
Fits 157QMJ-based 125cc, 150cc, and 169cc engines with the following engine codes:
| Engine Code | Engine Code | Engine Code | Engine Code |
|---|---|---|---|
| 157QMJ | 161QMK | 152QMI | 1P61QMK |
| YN1P57QMJ | 1P52FMI | 154FMI | JJ157QMJ |
| 1P57QMJ | BN157QMJ | BN161QMK-A | Other QMJ / QMK / QMI |
Performance Note: This product is intended for off-road use only and is not intended for use on public roads. Not legal for use in California on pollution-controlled vehicles — check local laws before installing.
