NCY Case Boring Tool (GY6)
NCY Case Boring Tool (GY6)
$190.85
6 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: The NCY Case Boring Tool is a must for most large bore projects on GY6 cylinders (up to 67mm) and other model cylinders (up to 72mm).Compatibility:RS 100SUPER-4 100JOG 100GTR 125GTR AERO 125RS ZERO 100RS Z-100BWS 125BWS 125 XNEW CYGNUS 125CYGNUS 125CUXI 100SV-MAX 125SV 125AXIS TREE 125FUZZY 125FORCE 125MAJESTY 125NEW DUKE 1254V 125X-PRO 125NEW X-PRO 125ATTILA 125FIGHTER 125/150NEW FIGHTER 150GY6 125/150DUKE125G3 125G4 125G5 1504U 100KIWI 100JR 1004V MOVIE 125NEW G5 125/150BUBU 125BUDDY 125/150/170BLUR 150G-MAX 150Note:ScootsUSA recommends using a drill press or hand drill equipped with a clutch when using this product.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.Made in Taiwan.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.
COMPATIBILITY: RS 100
NOTE: ScootsUSA recommends using a drill press or hand drill equipped with a clutch when using this product.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.Made in Taiwan.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.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: GY6
- Fits Models / Common Applications: Genuine Buddy and other compatible models may apply.
- 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 Genuine Buddy?
A: This SKU is listed with Genuine Buddy model fitment where the scooter also matches the listed engine or fitment notes.
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 | 2.906 lbs |
|---|---|
| Dimensions | 5.5 × 5.5 × 5 in |
| Condition | New |
|---|
Engine Builder Precision: NCY GY6 Case Boring Tool
Push the limits of your GY6 engine with the NCY Case Boring Tool. When upgrading to extreme big-bore kits (such as 61mm or 63mm cylinders), the stock engine case diameter is often too small to accept the larger cylinder skirt. This professional-grade tool allows you to precisely machine the engine case to the perfect clearance, ensuring a seamless fit for high-displacement performance upgrades.
Technical Performance Features
- Professional Machining at Home: Designed to eliminate the need for expensive machine shop services, allowing builders to bore their own cases with precision and consistency.
- Adjustable Cutting Diameter: Engineered specifically for GY6 125cc and 150cc (QMI152/QMJ157) engine blocks to facilitate 170cc, 180cc, and larger conversions.
- Guided Stability: The tool's pilot design ensures the bore stays perfectly centered with the crankshaft axis, preventing sleeve misalignment and potential engine failure.
- Hardened Steel Cutting Bit: Features a durable, high-speed steel cutter capable of shaving through cast aluminum cases with minimal heat buildup.
Comprehensive Fitment Guide
This specialized tool is compatible with a wide range of GY6-based and Taiwanese-manufactured engines, including:
| Brand / Series | Popular Models |
|---|---|
| GY6 Engines | All 125cc/150cc QMI152 & QMJ157 Engines |
| Genuine Scooter Co. | Buddy 125, Buddy 150, Blur 150 |
- Not compatible with crankcases with 57mm stud spacing
Technical Specifications
- Engine Type: GY6 125cc - 150cc (4-Stroke)
- Tool Type: Manual Case Boring / Machining
- Manufacturer: NCY (Made in Taiwan)
Mechanic's Note: Case boring is a critical process. For the best results, Scooterworks recommends using a drill press or a high-torque hand drill equipped with a clutch to prevent binding. Always clear aluminum shavings thoroughly from the crankcase before reassembly to prevent bearing damage.
Part Number: 1400-1015
Certification: ISO 9001 Certified
The NCY Case Boring Tool is a must for most large bore projects on GY6 cylinders (up to 67mm) and other model cylinders (up to 72mm).Â
- Not compatible with a 57mm stud spacing crankcase
| RS 100 | SUPER-4 100 |
| JOG 100 | GTR 125 |
| GTR AERO 125 | RS ZERO 100 |
| RS Z-100 | BWS 125 |
| BWS 125 X | NEW CYGNUS 125 |
| CYGNUS 125 | CUXI 100 | <
