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NCY Boring Tool (QMB, GY6, Universal)

Description: Engine bore tool by NCY. A must for using most large bore cylinder kits. IMPROVED DESIGN!! Now works with multiple engine designs! Installing a GY6 cylinder kit larger than 61mm requires the factory crankcase to be machined. That is why we offer NCY Boring Tool which allow a bore Crankcase to fit cylinder size 61mm for 171cc, 63mm for 180cc or even 67mm for 232cc with replacement extended stroker on 57mm stud GY6 engine (crankcase). Will also work on 54mm stud A-Block bore upto 63mm and 50mm 139QMB bore upto 52.4mm. All else model can bore to 72mm! Replacement blade is available (Part# 1400-1081).


Includes the following power-drill attachable Bore tool, Bore bit, Allen fasteners, and NCY Sticker.

•    Bore Bit (blade)
•    Bore Tool (bore upto 72mm MAX.)
•    Fit 50mm Stud Spacing /Diagonal 70.5mm (139QMB, bore upto 52.4mm)
•    Fit 54mm Stud Spacing /Diagonal 76mm (A-Block, bore upto 63mm)
•    Fit 57mm Stud Spacing /Diagonal 80.5mm (B-Block, bore upto 67mm)
•    Fit Other Models (bore upto 72mm)

•    Fit GY6 50/100/125/150cc+

Supported Models: GY6 40QMB 50cc 2-stroke, 139QMB 49cc-50cc 4-stroke, 50QMF 90cc-100cc, 152QMI 125cc, 157QMJ 150cc, 161QMK 170cc, 161QML 200cc, Chinese Scooter, ATV, Genuine Buddy, Kymco, Polaris RZR 170, Ruckus, TaoTao, Vento

And, many known applications here...

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, SV-MAX 125, SV 125, AXIS TREE 125, FUZZY 125, FORCE 125, MAJESTY 125, NEW DUKE 125, 4V 125, X-PRO 125, NEW X-PRO 125, ATTILA 125, FIGHTER 125/150, NEW FIGHTER 150, GY6 125/150, DUKE125, G3 125, G4 125, G5 150, 4U 100, KIWI 100, JR 100, 4V MOVIE 125, NEW G5 125/150, BUBU 125, BUDDY 125/150/170, BLUR 150, G-MAX 150
Item Weight & Product Dimensions:
•   3.638 Pounds | 4.260" (OD) x 2.837" (ID) x 4.6" (H)

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NCY Boring Tool (QMB, GY6, Universal)
  • Availability: 19
  • Brand NCY
  • Reward Points: 5
  • Model: 1400-1001
  • Weight: 3.88lb
  • SKU: 1400-1001
Products Sold: 1
Product Views: 2961
Price in reward points: 146