81.5cc 100cc 50mm Big Bore Cylinder & NCY Big Valve Head GY6 50cc QMB139 Scooter

Description

ITEM DESCRIPTION:
100cc / 81.5cc 50mm Big Bore Cylinder with an NCY "Power &
Speed" 23x20mm Big Valve Cylinder Head (Made in Taiwan).
NOTE:
The big valve head is very expensive. I have this kit with a standard head in another listing at a much lower cost.
NOTE:
Currently the big valve head is only available with Non-EGR head & 64mm
valves.
NOTE:
The 50mm big bore cylinder is commonly called 100cc but it will give an actual displacement of 81.5cc. This is a deceptive practice (all I can do is warn my customers).
GY6 Engine Specs (below):
Notice the stated displacement compared to the actual displacement (They're deceptively rounded... please be aware of it).
Model                            1P39QMB   1P44QMC   1P47QMD   1P50QMG
Cylinder Bore (mm)                39             44              47                50                 52
Stated Displacement
(cc)      50             60               80              100                120
Actual Displacement (cc)      49.6          63.1             72                81.5               88
Compression ratio                10.4:1        10.4:1         10.3:1          10.2:1            N/A
Max power(kw/rpm)           2.4/8000    2.7/8000    3.1/8000     3.5/8000           N/A
Max Torque(N.m/rpm)        2.6/6500    3.5/6500    3.8/6500     4.8/6500           N/A
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Customer satisfaction is my top priority, as a result, I don’t have many returns. Returns cost both of us time and money so please contact me with any questions you may have before bidding. I will spend as much time and effort as needed to make sure you get the part you need.
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WHY BUY FROM PARTSGALORE?
1) I only sell the best quality parts at very reasonable prices. Everything I sell comes with my personal quality guarantee. 2) I treat my customers with kindness and respect
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. 3) I only sell what I have on hand and ready for immediate shipment.
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