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You are absolutely right EMGX,my TSDZ2 does not have any of the two (brass?) shims. Although the play seems to be coming from the shaft/torque sensor assembly. I'm not sure if shims will help that. An even bigger concern are the red and black wires that are visible in the video, probably for...

Thanks! I don't have one of those near me. I am thinking Ace Hardware may be a good source.

Thanks. EMGX. That makes sense. I'm not expecting perfection but there should be a way to improve the fit. I'll probably take a look sometime next week. I will report what I find.

Maybe it's just the nature of this design. On my non electric bikes the chain rings are rock solid. Tong Sheng really needs to improve their tolerance/quality control.

Thanks, but I believe its a common problem even with brand new units. I can understand a small amount of wobble, but enough to actually cause a chainring or spider to scrape the plastic housing is disappointing. The play appears to be coming from the main gear and shaft connection.

Thank you EMGX for providing some useful information 👍

The wobble also occurs with brand new units. So rider usage is not the issue. I doubt most riders are abusing the units even if they don't "spin" correctly. Hopefully the B version is better.

Thank you. That helps a lot. I'll check for those spacer shims and consider replacing the gear assembly.

Yes but that extra 11 lbs makes me feel like superman :) . Thanks! I have the older version. I'm considering a replacement for the large gear and clutch assembly but am concerned about how I will remove the gear assembly from the shaft. I may need a special tool? At the moment the added...

Thanks EMGX for providing some useful information. The wobble is enough so that the chain ring is scraping the plastic cover of the main gear. I will move the chainring away from the motor but that will make my chainline worse. When I pedal I can see my chain bouncing side to side quite a bit...

4mm of play in the chainring/shaft is normal????? That's BS! Who are you kidding? This wobble issue is very disappointing. It even occurs on new TSDZ2 motors. Buyer beware!

I'm using clipless pedals so I believe my pedaling technique is fine. Been practicing for over 50 years :)

Thanks, PedalUma. Only the chainring moves, the motor itself is solid. The 5mm and 4mm bolts are tight. Like I said I have another bike with a new motor and it pretty much does the same thing. Not as bad as the attached video though. My TSDZ2 appears to work fine even with this play. It's...

I noticed that the chainring of my TDDZ2 wobbles. Same as shown in the link below. That is not my bike in the video. The motor has just over a year of use. I have another bike that has a new motor and it also appears to have some wobble. The bottom bracket nuts and everything else are tight...

I have had my Tong Sheng TSDZ2 for about a year now. During that time I have probably put about 2000 miles on the motor. The motor is working great and I hope to keep it that way. Is there any maintenance that I should be doing, such as cleaning and greasing, to this motor and and at what...

That's great, maybe you can start a thread telling us all about it.

Thought I would update this thread. I now have the bike prepared for some long range rides. I have a 14ah battery mounted to the down tube. I was concerned that just using the two bottle holder mounts on an aluminum frame may not be sufficient. But between using foam insulation to help spread...

I'm not thrilled by the size, shape and mounting options for most batteries. I rather my bike not look like it is obviously DIY. I think something like this would look good. Long, narrow, not too tall with a nice shape. Don't want something that looks like a bomb or a fish! :) Although I have...

Thanks PedalUma. I appreciate the tips.

How about something like this, Samsung 3500mah cells, can these sources be trusted? I rather not spend $500-$600 on a battery if I don't have to. My concern with this type of battery is that the two screws used for the bottle holder will not be adequate for something this heavy...