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Blade 450 Main Gear (2) Specfications:
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Many thanks for your reply regarding the diameter of 300X main drives, Eric
BLH1651 was the original pinion for the 400 3D, 450 3D and 450x helis and has straight cut gears so it is not a direct fit to the 270CFX which has helical cut gears.
I recommend sticking with the BLH1901 gear.
Answered by: Ben @ Wheelspin Models
2 x gears – Helical gear 70mm / Straight 68mm
Answered by: Si @ Wheelspin Models