Hi all,
I am building a new ebike with a GNG 650w on a kona coiler, will be used with 18s 10ah and a lyen 12fet.
I received the GNG yesterday, and I saw the primary chain make a lot of noise (because of the big chain and small 11T sprocket I found on the forum)
So I think the best is to change for #25 chain reduction, I have already 13T 10mm bore pinion and #25 chain, so I need a compatible sprocket, I'm thinking to use a 55-68T maximum (68T #25 = 140mm, original on the GNG is 54T 140mm).
A sprocket like that, I think it's direct bolt on : http://www.aliexpress.com/item/55-Tooth-sprocket-for-some-gas-and-electric-scooters-models-using-25-chain-free-shipping/614066672.html
What do you think, and do you think it will be fine to upgrade the other side with BMX half link?
Best regards ! I will post videos when it will working !