ElectricMotorcycleForum.com

PArd, what rear shock did you go with in the end if you ditched the Ohlin?

Riding since a few weeks with the new Z-Force 17.3 kWh battery on my SR/F it was the first time last week that I needed to overtake a couple of cars going uphill, on a curvy road, and with 13% SoC left. Contrary to past years with the old 14.4 kWh battery it didn't force me into ECO mode. What a nice surprise! I've heard someone who went from a DSR to a DSR/X making the same observation, so not just me.

There's currently two batteries on Ebay for around £1k, a 14.4 on its own and a 7.2 with the charger and storage bin (off an S/DS). Both from low mileage bikes too. However they've been on there for quite a while and I highly doubt the sellers have been maintaining them, rather just letting them sit stuffed away in a corner, thus they're most likely junk by now and the sellers make no mention of voltages or how long they've been sitting or even that they might not be any good. Had someone snapped them up when they were first put on they may have got a bargain, but these batteries aren't the sort of thing you can leave sitting around for years until they're needed.

The text article is not worth much besides the weight distribution.  2 seconds faster than a sort of street bike Energica but how long is the course for those not following the series.   The video is great in my estimation.  Makes me wonder what the traction control rules are in motorcycle road racing.  Is it still AMA rules?

Thanks for your support MVetter I’m searching second hand batteries since 1 year already, nothing available in Europe…
I find only salvage auctions in USA….

You’re absolutely right jepe !
It’s chemistry not mechanical….
I bought 2 molicel 21700  p45b batteries for e-cigarette use,6 months ago
Needed 1 per day after 6 month need 2….
This is so representative of the world we leave in….

Everything goes fast… but don’t last…

Everyone goes crazy on the stark varg , surron storm bee…
Spare battery of the stark is 7000$ and 4500$ for surron….
In few years we will see many people realize too late they absolutely didn’t save money in gaz…

Companies should be obliged to have a battery management long term program to keep their customers happy…..
Discount on new packs and obligations to recycle old one….

I didn’t post this topic to criticize zero motorcycle because I love my bike and cruising in silence and don’t scare ,children’, families ,birds ,horses….
But I really hope EV future is not going to be millions of lithium packs low mileage in the dump after 10 years….

Most the racing bikes the battery's are liquid cooled.  Air too of course but in that environment it's not super efficient.  The biggest problem is room, having to shove the waterways down between the cells and keep the weight / size down.

Hopefully this so called sodium technology is something and can be a game changer.  It'd be nice to have an E bike that weighs a few hundred pounds less.

Aaron

Sodium is less energy dense than lithium and will likely find its uses in storage facilities rather than mobile use.

Not entirely sure, mine works but.

If you turn it on, maybe it then gives you the menu of which beat you want to use?

Aaron

Some of the throw aways I have gotten are your 30 and 40 Amp hour batteries, so they have a decent amount of cells in them.  The hospitals change them all out pretty much in a group, so realistically, even though you may have to tear apart 4 batteries to make 1 bigger battery, all the cells, are probably about the same in the amount of use they each received. 
Ive talked to the techs who actually did the change outs at the hospitals, and he was saying that many of the batteries, the system is on the grid, the battery is just in case it went down, the hospitals also have emergency generators too, so IN the rare case it was used, it was only for a minute or so, so they are all essentially like brand new, but the ins company makes them change them out for liability reasons, so out they go !

Hey Aaron, do you want a pallet load of 33 Ah Lithium Batteries, each one has it's own built in BMS.  Max amp draw per battery is 40 amp.  F-K yeah Ill take that!!!  Lead acid recycles,  Lith FerroPhosphate does not, they are more than happy that I take these off their hands.  Worse case, drain them chop them and chunk em, Ill recycle the nickle for a few bucks / lb.

Aaron

For those looking for cheap batteries.   I often get a LOT of decent/ read really good condition batteries from places like the Batteries Plus stores.  Hospitals and other critical demand places have to change their batteries out on their Defibrulators / Cardiac maches and other critical equipment every few years at most, whether it's good or not, CHANGE IT.  They take the batteries to these stores to get rid of them.  So you have access to lightly used, WELL taken care of Lithium batteries, for essentially free.

They don't always have the LiPo's but DO have a lot of higher ampere hour demand Ferro chemistries, so unless you need a ton of amps for the bike for blistering speed, one of these might work super well for you also and are typically rated for stupid like 5 to 8 k cycles from the manu.

Just talking out loud, might help you find batteries if you need to get some to play with / test your bikes with.   Invariably they get boogered up every now and then, and it's nice to have a source of cheap replacements.

Aaron

Thanks for the info. This is an interesting option that I never knew existed. The challenge may be getting enough cells of a similar type/size to make larger packs that can be balanced. That said, if they are consistently "lifed" then its likely that cells of the same type would have similar remaining performance. If the price is right and you are able to match a stack of them up then this could work really well.

In the winter of 1986 I  built a TZ500KZ - a TZ250 road racer chassis with a Kawasaki KX500 two stroke 500cc motocross motor. It raced in the Pacific Northwest road racing series in the open single class. I raced it and won several regional championships in British Columbia, Washington State and Oregon. I wish I had the design tools we see here. It would have been even better than it turned. I am so impressed with your project and how thorough you are! I am glued to your channel.

Thank you for sharing.

Your build sounds like a lot of fun. I've never ridden a 500CC 2 stroke but can imagine how that would have gone

CAD and 3d printing and prototyping services have certainly made one off builds a lot more accessible for DIYers with a basic home shop. Thanks for the sub!