Hi, sorry my first post here is regarding a potential issue, I'm hoping some of you knowledgeable helpful people may be able to help me out with some questions I have regarding a BBSHD I purchased last week. The first strange thing I came across when fitting the motor were the markings on the motor casing. I have looked at pictures of other HD's and I also own a BBS02B which bears the standard well known Bafang serial number format and model designation, which allows easy identification and also gives the date of production. This BBSHD however has a different style and format for the case markings as seen in these pictures (it also has separate markings on the controller).
These are the markings on the gearbox or main casing.
This sticker was on the side of the motor.
This is on the top of the controller casing.
I suspect this may just be something that Bafang are doing with their latest motors as the markings appear to relate to model codes listed on Bafang's own website (which is sketchy at best). I don't know if anyone else can shed any light on why my motor markings are different to others I have seen? Also another point worth noting is that this particular controller doesn't have the extra wires added for the gear sensor or the headlamp output that I believe some later HD's have.
Now on to the second and (for me) most concerning issue regarding my new motor. During fitting I noticed there was a strange uneven resistance felt when turning the cranks by hand with the unit unpowered (and no chain installed). It feels as though one of the gears, possibly the nylon gear is running eccentrically or out of true. Like the mesh between 2 gears gets tight and then loose, creating multiple unpleasant tight spots during a full crank rotation. When back pedaled everything feels fine so that rules out the axle bearings. I checked the large reduction gear to make sure it was properly greased, which it was. I have also noticed about 1mm end float in the crank axle which seems a little excessive compared to my BBS02.
After finding that the vendor I bought my motor from had no contact telephone number and didn't seem to be very good at responding to emails or his own website contact form, I decided to assemble the bike anyway and see how things were after a few miles, which would give everything a chance to bed in. I now have about 60 miles on the odometer and it still feels the same. When riding slowly with low pedal inputs and low power from the motor, sometimes there is a strange sensation of the pedals dropping away from your feet as the resistance comes and goes (although this is not noticeable at higher pedal input and motor power levels). At certain power levels and cadences I sometimes hear and even feel through the pedals a strange oscillation/vibration.
Making a direct comparison to my BBS02B the new motor feels as though there may be a problem, as the BBS02 has always been silky smooth right from new and now has about 1k miles on it. Is this normal for a BBSHD or should I try to return it for a replacement?
(if I can ever get hold of the company that sold it to me that is).
Thanks in advance for any help/advice, and just for the hell of it here is the motor on my bike.
These are the markings on the gearbox or main casing.
This sticker was on the side of the motor.
This is on the top of the controller casing.
I suspect this may just be something that Bafang are doing with their latest motors as the markings appear to relate to model codes listed on Bafang's own website (which is sketchy at best). I don't know if anyone else can shed any light on why my motor markings are different to others I have seen? Also another point worth noting is that this particular controller doesn't have the extra wires added for the gear sensor or the headlamp output that I believe some later HD's have.
Now on to the second and (for me) most concerning issue regarding my new motor. During fitting I noticed there was a strange uneven resistance felt when turning the cranks by hand with the unit unpowered (and no chain installed). It feels as though one of the gears, possibly the nylon gear is running eccentrically or out of true. Like the mesh between 2 gears gets tight and then loose, creating multiple unpleasant tight spots during a full crank rotation. When back pedaled everything feels fine so that rules out the axle bearings. I checked the large reduction gear to make sure it was properly greased, which it was. I have also noticed about 1mm end float in the crank axle which seems a little excessive compared to my BBS02.
After finding that the vendor I bought my motor from had no contact telephone number and didn't seem to be very good at responding to emails or his own website contact form, I decided to assemble the bike anyway and see how things were after a few miles, which would give everything a chance to bed in. I now have about 60 miles on the odometer and it still feels the same. When riding slowly with low pedal inputs and low power from the motor, sometimes there is a strange sensation of the pedals dropping away from your feet as the resistance comes and goes (although this is not noticeable at higher pedal input and motor power levels). At certain power levels and cadences I sometimes hear and even feel through the pedals a strange oscillation/vibration.
Making a direct comparison to my BBS02B the new motor feels as though there may be a problem, as the BBS02 has always been silky smooth right from new and now has about 1k miles on it. Is this normal for a BBSHD or should I try to return it for a replacement?
(if I can ever get hold of the company that sold it to me that is).
Thanks in advance for any help/advice, and just for the hell of it here is the motor on my bike.
