Ok its finally complete. After much consternation and lurking for months on the internet, I made the decision to add an electric motor to my Tern Verge Si8. I wanted a belt drive big time. I had it with tedious chains, vulnerable detailers and rim type brakes. So I went to GRIN technologies (local Vancouver outfit) to supply the parts and since being a newbie I just listened to their recommendations and opened up my wallet.
I had some some small problems with the wheel insertion because the disc brake interference didn't allow free wheeling. So I had to remove a shim that was on the motor. Then the motor torque nut was changed to their designed torque arm (these guys are mechanical engineers) and the M5 nut that they supplied was too short for my fender mount. Luckily I had an M5 bolt from my parts bin. This was a little tricky because it was very easy to cross thread this because it is an aluminum front assembly. Once installed, it is recommended to place the motor in such a way that the power cable is pointing down. This helps to avoid water ingression into the unit. The motor is designed with seals and is supposedly water proof BTW.
I installed a front hub Bafang G311 (standard wind), Cycle Analyst V3.1, 36V 14 Ah Downtube Battery with Panasonic PF Cells. with a 25 Amp controller. I purchased a crank PAS and a throttle and so far I haven't install the PAS sensor because I don't have a crank puller. But I want try just the throttle for now and being a avid motorcyclist I like this arrangement. I also purchased a wire kit that helped tidy up the wiring. So my first thoughts after 10 kms...
The Cycle Analyst display has these big pixels and seems to be right out of the 80's era. Its very visible in bright sunlight and gives the essential information on the screen. Speed, battery status, realtime watts usage, amp usage, trip distance per charge (needs reset after every charge if you want to monitor battery usage). I am very, very pleased with the feel of this bike. Plenty of power for the hills in my neighbourhood.
The Cycle Analyst is accessible through a PC (Mac or Windows) software with the appropriate interface cable so you can fiddle with various parameters of the controller. You can also change the parameters through the Cycle Analyst display but its probably more tedious with only 2 button input buttons. GRIN setup the Cycle Analyst before I picked up the parts that matched the Bafang motor that I bought. I haven't played with parameters yet but you can tell this was designed by a bunch of engineering types. I like this even though its not simple. The thinking behind this is the way that I think. GRIN staff and support is great. They answered all my concerns and questions and their web site is filled with lots of technical information, videos and definitely lots and lots of products. Highly recommend GRIN to those who want to build their own.
I had some some small problems with the wheel insertion because the disc brake interference didn't allow free wheeling. So I had to remove a shim that was on the motor. Then the motor torque nut was changed to their designed torque arm (these guys are mechanical engineers) and the M5 nut that they supplied was too short for my fender mount. Luckily I had an M5 bolt from my parts bin. This was a little tricky because it was very easy to cross thread this because it is an aluminum front assembly. Once installed, it is recommended to place the motor in such a way that the power cable is pointing down. This helps to avoid water ingression into the unit. The motor is designed with seals and is supposedly water proof BTW.
I installed a front hub Bafang G311 (standard wind), Cycle Analyst V3.1, 36V 14 Ah Downtube Battery with Panasonic PF Cells. with a 25 Amp controller. I purchased a crank PAS and a throttle and so far I haven't install the PAS sensor because I don't have a crank puller. But I want try just the throttle for now and being a avid motorcyclist I like this arrangement. I also purchased a wire kit that helped tidy up the wiring. So my first thoughts after 10 kms...
The Cycle Analyst display has these big pixels and seems to be right out of the 80's era. Its very visible in bright sunlight and gives the essential information on the screen. Speed, battery status, realtime watts usage, amp usage, trip distance per charge (needs reset after every charge if you want to monitor battery usage). I am very, very pleased with the feel of this bike. Plenty of power for the hills in my neighbourhood.
The Cycle Analyst is accessible through a PC (Mac or Windows) software with the appropriate interface cable so you can fiddle with various parameters of the controller. You can also change the parameters through the Cycle Analyst display but its probably more tedious with only 2 button input buttons. GRIN setup the Cycle Analyst before I picked up the parts that matched the Bafang motor that I bought. I haven't played with parameters yet but you can tell this was designed by a bunch of engineering types. I like this even though its not simple. The thinking behind this is the way that I think. GRIN staff and support is great. They answered all my concerns and questions and their web site is filled with lots of technical information, videos and definitely lots and lots of products. Highly recommend GRIN to those who want to build their own.