NCY Racing Valves; GY6
NCY Racing Valve Set – Stainless Steel 28/23mm for GY6
$44.85
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 High-RPM Racing Valve Set – 28/23mm for GY6
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: GY6
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 GY6 scooters?
A: This SKU is listed with GY6 engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 4 × 4 × 1 in |
NCY Performance Racing Valves deliver a noticeable improvement in idle quality and high-end pull on GY6 125cc, 150cc, and 171cc engines. Precision-lapped seats ensure a perfect 360° seal, eliminating compression loss and erratic idling common with soft factory valves that stretch or leak under high stress.
These are also the OEM replacement valves for the NCY Big Valve High-Flow Cylinder Head (SKU 1100-1254). Made in Taiwan. SKU: 1100-1257.
Key Features
- Precision lapped seats — perfect 360° seal eliminates compression loss and erratic idle
- High-heat durability resists mushrooming and carbon buildup vs. OEM valves
- Optimized flow profile for high-flow heads at 10,000+ RPM
- IN: 27.8mm / EX: 22.9mm — fits GY6 125cc, 150cc, and 171cc BBK applications
- Premium NCY manufacturing for superior balance and longevity
- Intake Valve (IN): 27.8mm OD | 65.75mm height | 5.0mm stem
- Exhaust Valve (EX): 22.9mm OD | 65.3mm height | 5.0mm stem
- MPN: 665C13GY628LL
- SKU: 1100-1257
- Origin: Made in Taiwan
| Application | Engine Codes / Models |
|---|---|
| Genuine Scooter Co. | Buddy 125, Buddy 150, Buddy 170i, Blur 150 |
| Standard GY6 Codes | 157QMJ, 152QMI, 161QMK, 1P61QMK, YN1P57QMJ |
| Big Bore Kits | 58.5mm (155cc), 61mm (171cc), 62mm, 63mm BBKs |
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Tech Tip: Pair with NCY Performance Valve Springs rated for 11,000 RPM. Always lap new valves into the head with fine-grit grinding compound to ensure a gas-tight seal before final assembly.
This product is intended for off-road use only. 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.
