Ask an ebike technical question get an answer within 30 minutes or so.

[dev]

Hey, I have a BBSHD with Luna 42T chainring and a 11-36T 10-speed SRAM casette.
After mounting the motor, the chainline is such that I can use the upper 7 speeds of 10 total.
The 7th cog is 28T, but given that the chainring is 42T, that is still too small (i.e. pedaling is not easy enough on hills).

In all my searching on the web, I didn't find any 10-speed casette where the 7th cog on a 10-speed is larger than 28T.
And also I can't just rearrange the order of sprockets on the casette because the first few and the last few must be in exact order, so it is not giving me almost any room for rearrangement.

My thinking is that I need to find some company which is producing individual sprockets and spacers, so that I can buy the first 6 or 7 sprockets in exact size that I want (for example something like 13 - 17 - 21 - 2? - 28 - 32 - 36 - any - any - any).

Can someone confirm this idea (and name a company which produces individual sprockets/spacers), or is there some other completely different idea/solution?

Thanks.

[dev]

Thanks pure_mahem, I thought of it but just like the largest sprockets are on a custom spider, so are the first few/smallest sprockets also linked together. (I mean they are not physically held together, but at least on my SRAM casette they have spacers and some ridges/grooves casted directly into the aluminium, making them fit properly only if they are in original order.)

[pure_mahem]

Sunrace CSMS3 TAZ the first 4 gears are loose with spacers then a set of 3 on a spider and another set of 3 on a spider.

Just re read your post. I see.

[paxtana]

In any case there's a ton of cheap cassettes out there that don't put the biggest sprockets on a custom spider. IIRC Sunrace cassettes. I think even the HG50 and HG400

[Pizzabroodje]

Will the BSB-1 stabilizer bar work to stop a BBSHD from rotating when mounted on a press fit Bottom Bracket with an adapter?

Thanks in advance!

[paxtana]

Yes, it should. Not something I can promise as it is down to how it is used though. Might need to fiddle with it to get it to work best for your use case, but that's pretty typical of this particular part.

[omnitox]

I love the Sur-Ron and want to buy one asap.
Unfortunately I have to slow it down to get a registration in Germany.
That means I have to change the max rpm of the motor.
Can you config/program the controller (like it is possible with the bbs02/bbshd)??
If not possible with the standard controller, are there other controllers that does have this feature??

This is the first step, the second part is to change the gear.
Are the sprockets "standard" parts that are available in different sizes??

I would need a smaller front sprocket and/or a larger rear sprocket.

Thank you very much for your help

[paxtana]

I am sorry, we do not ship Surron overseas.. it is my understanding that there are european distributors which you should be able to find via a google search. Your question would be better suited to them. I am aware that they have a lower power version which may be suitable, additionally many surron ships in a low power mode that is ostensibly street legal. Probably want to ask them about your particular country and go from there.

Yes the rear sprockets can be changed. We have a few sizes in the surron parts section. The front sprocket is not changeable to different size.

[omnitox]

Thank you for your fast answer.
I have written with a German shop that is offering the Sur-ron with a 45kmh registration.
It is 100% street legal with a number plate and you have to wear a helmet. BUT I need a 25kmh registration

The shop just sells electric bicycles and electric motorbikes and scooters.
They would do a single "TÜV Abnahme" and register the bike with the 25kmh that I need., BUT

The problem is that they don't have the tools (cable+software) to program the controller and change the power( max. RPM) of the Motor.
Without there is no way to change it...and register it

[HIGHVOLTAGE]

There are currently no tools or software to program the Sur-Rons right now. It's still a very new product.

[bbe]

Im traveling to US, Alexandria Virginia soon and return home April 12. I want to order some spare parts for my BBSHD, but the controller ver B has been out of stock until now. Since VA is on the East coast, and you have up to 72h handling I'm worried it will not reach my hotel in time before I return. What do you think of this, if I make the order as soon as you answer me? Can I use Ground shipping or do I need something faster, and if so what approx will it cost for about 3-4lb packet?

[HIGHVOLTAGE]

Version B controllers are out of stock, so are many of our BBSHD units. You'll have to wait till it comes back in stock. This is not the appropriate thread for this question though. You should probably email LunaCycle directly as this thread is for technical troubleshooting

[lv2bike]

I have a 750 watt Bafang BBS-HD motor with a 48v 10ah Hailong Shark Battery pack. I am going on a long ride and wondered what you recommend for a portable extra battery that I can store in my pack to replenish the existing battery or plug in as a spare. Many thanks!

[HIGHVOLTAGE]

Technically anything in 48v will do. I mean there are plenty of options. I don't know the size of your pack so I'm assuming you're referring to a backpack. It heavily depends on the size you're looking for though. I'm pretty sure you can fit a Shark Pack in most backpacks though.

https://lunacycle.com/48v-panasonic-13-5ah-shark-pack/

EDIT: 52v will work too. The Mighty Mini Cube is good for portability.

https://lunacycle.com/52v-mighty-mini-cube-samsung-ebike-battery-pack-30q-6ah-3-pounds/

[mahiaiman]

I accidentally connected my battery discharge wires in reverse to controller. Now battery does not power the motor nor does it take a charge. Anything I can do to remedy this?
Thank you!

[paxtana]

Have you tried jumpstarting the battery? This resets the battery management system if it trips. You would do this by charging via the discharge connection (MAKE SURE YOU CONFIRM POLARITY BEFORE DOING THIS)

This shows the general idea, though the specifics depend on the battery and charger type

http://lunacycle.com/jumping-your-luna-shark-battery-pack/

For more indepth info https://electricbike.com/forum/forum...ctrical-issues

[dev]

Hey check this picture and the rear shock: https://www.racecouk.com/wp-content/...L-275-2018.jpg

I would need the pressure chamber to be on the left side (unlike on the right side like pictured), or otherwise I can't mount the battery due to lack of space.
Is just flipping the orientation of the rear shock in this way OK to do?

Thanks

[dev]

Looking at the pictures available online where some show various arbitrary orientations, I take it that it is safe.

[paxtana]

I can't speak to the details of this particular shock but I have done something similar on one of my personal bike builds and had no issue doing so.

[Lee Longson]

what is the voltage on a 750 watt bare motor only you order from Luna

[paxtana]

Do you have a link to what motor you are asking about, we sell several bare motors.

Not sure what you mean by the voltage of the motor, you mean what it can handle?

[dev]

I tried out the BBSHD with a battery today, finally.

Two observations/questions:

1) If there is no speed sensor, after less than 30 seconds the display shows "Er 21" and controls stop working. This is different than other forum posts where it says that display will shut off, but controls will keep working. What gives? (BBSHD manufacture date is from Sep 2018 iirc)

2) The throttle behaves like a button. As soon as the controller (and/or C961 display) figure it is pressed, they drive the motor to 30 km/h and that's it. This behavior is the same regardless of the PAS level I am in. Is the reason for this that I am testing it in the air with no resistance from the surface? Also, where is the 30 km/h limit coming from? (I ordered BBSHD offroad version)

Thanks

[dev]

Ah damnit. I did read about post-2017 controller where the throttle interferes with PAS in ways in which it didn't previously.
But I thought that if only throttle was used, it was still possible to get smooth acceleration.
I guess I'll need to find those forum posts where people suggested ways how to get the behavior as close as possible to how it worked previously.
Thanks for replies, much appreciated.

[HIGHVOLTAGE]

https://www.endless-sphere.com/forums/viewtopic.php?f=28&t=93977&p=1375813&sid=1ba2675afbcf9f5094b1027fbdfb0bc3#p1375813

[paxtana]

You could try to reprogram it with one of the other profiles. Might make a difference. Throttle response can be very subjective though so it's hard to say

[Rachel]

Hello-

I have a dolphin 48V battery which I notice you no longer sell. I am looking to buy a new battery for my bike that fits in the same spot that I have constructed. Is the Wolf battery have the same dimensions? Also the controller and charger I have are from my first purchase. Charger Model: Umini AC input 100V-240V, 50-60Hz

Thank you
Rachel

[paxtana]

Hello Wolf battery does not have the exact same dimensions, if you go to the listing there's actually a PDF that you can print and tape together to get a full-size mockup so you can see if that mockup will fit within the space you have. If you are referring to a 48 V charger it will not be compatible with Wolf which is a 52 V battery. You would need a new charger.

[frankhouser50]

My pos cuts in and out not really working at all
Anything I can do
No error codes
Act's like a torque sensing issue
bbshd hotrod v. w/52v

[paxtana]

Check that you are not using pas at same time as throttle, that will cause it to cut

[lv2bike]

I'll be riding in a rally next weekend and the weather prediction is rain. I have a Bafang HD on my trike. Do I need to protect the battery from the rain? if so, how?

I understand that the motor will be okay and the controller is the weakest in rain. But I really don't want to damage my battery - suggestions? or should I not worry?

Many thanks

Andrea

[paxtana]

Depends on the battery. If you are using a Luna wolf pack I would not worry at all. If it's a dolphin or some random softpack then you may want to do a bit of extra work on it. I assume you have already read the bbshd waterproofing section on the knowledge base. For a non-wolf battery you may want a bit of dielectric grease on the contacts and wrap pack itself in a grocery bag

[jangles]

Is it possible to use a power converter in my truck to charge my 52v battery while running down the highway ? If so how big of a converter would I need to run my 58.8v 3.0A charger ? TIA .

[Rokon]

A 110vac inverter running off the truck will operate your charger ok. You need about 2A, 110vac so a 400-600 watt inverter would be good. Gives you some headroom and won't max the inverter out.