Tornaro Bighit Review and Upgrade

[rroland]

Hi
Im very interested in this discusion.
I am convinced that the Tornaro Bighit (Zoco Rosa in OZ) is for my needs.
I find it hard to get any real operational info on these bikes and the questions that you guys are asking is possibly because of this lack of information.
I asked the local supplier and was told they are maintenance free. (or they don't have any info and just interested in selling).
Has any one asked the manufacturer (China National Aero-Tech)

 

[gorach]

Hi roland,
I did email them and they did reply, but I got the impression they werent that interested. Probably get better advice from the members here. These crank drives are meant to be maintenance free, our friend alban is a bit of an obsessive with a disturbing compulsion to de-manufacture perfectly good bikes, so any questions ask him.

 

[deepfraught]

Yeah this thread alban and Greg5865 show photo steps of dismantling for possible greasing.
http://www.endless-sphere.com/forums/viewtopic.php?f=28&t=38412

Correction to my earlier post, it seems it's playing tricks on me, or the lack of propulsion from any throttle had me thinking it was just freewheeling (being used to the A2B Metro distinct throttle response). It is operating as it should... just no quick pick-up in top gear compared to me coasting. I tested it from stationary no pedalling just throttle and it worked as it should.
That's a long way of saying it is very restricted in standard form =P

 

[A_Boring_Username]

I have one of these (the Asaeko sport model) and I get full motor power from standstill using the throttle. particularly handy on hill starts. the only issue I have is that there is a slight delay switching from throttle to pedelec - throttle has precedence (i.e. if I am using pedelec and knock throttle even slightly it essentially switches off the pedelec for about 2-5 seconds)

No maintenance issues so far except for the rim brakes being crap. I am considering either getting the disc upgrade, or maybe just get some better rim brake pads. The batteries seem to have some serious voltage sag issues though as the battery level indicator can drop to almost empty from full on the hills, just to go back to full again at the top. I have only had this bike for about a month though.

 

[boostjuice]

Being that this is a worm drive motor setup, how is the efficiency compared to a hub motor of equal wattage output? I only ask because there is much talk about how inefficient worm drives are, but I wonder in the real world if it makes much difference at all? It CERTAINLY simplifies a drive box!

Just to clear things up, this gearbox does NOT feature worm/wheel style reduction (50-90% efficient), but rather a 1st stage spiral-bevel reduction (95-99% efficient + quiet), followed by a 2nd stage helical reduction (94-98% efficient + quiet). In short, this is a very good gear reduction design assuming the teeth materials and profiles are appropriately matched for the torque levels and that the tolerancing is good enough to promote long wear life.

 

[voicecoils]

I liked this part of the ZOCO ebay ad:

Local Pickup is allowed - our warehouse is in Moorebank, Sydney.

Our delivery service is an express service; if your order is received before 11.00am then your order will leave our warehouse on the same day.

We will issue you with tracking details on the day your item is shipped - this tracking information will give you an ETA for your delivery.

If you would like to authorise the courier to leave your coffee machine in a safe place at home, then please send an email to sales@zocoelectricbike.com.au at the same time that you pay for your purchase advising of the details.

ZOCO prides itself on super fast delivery and superior after sales service.

* Free Postage not inclusive of remote postcodes: 6443, 6434, 0880, 0822, 7255, 7256 and 7257.

 

[gorach]

Hi boost,
your schematic looks v similar to the tonaro unit. What do you think of the power rating and power limits of this unit? Do you think it needs regreased every year or so?

 

[boostjuice]

Hi boost,
your schematic looks v similar to the tonaro unit. What do you think of the power rating and power limits of this unit? Do you think it needs regreased every year or so?

Peronsally, If i owned one i would see about liquid gasketing the casing sections/bolt holes and filling it with a light weight gear oil to a minimum dip-bath level (both for added efficiency, lower noise and longer wear life)

 

[alban]

Wiring diagrams anybody?
You can see my struggles with wiring in a new controller to the Tonaro here http://endless-sphere.com/forums/viewtopic.php?f=2&t=40635. I've attached the one for the UK Tonaro which is almost identical to mine.
I think I've identified most wires but I'm stumped as to why I get 36V on the yellow brake wire in the 5-way connector when pulling on the brake when it doesn't appear to be connected to anything! Must be a 36V supply in there somewhere....
Anyone know if those little hex grub screws are oiling points or not?

 

[A_Boring_Username]

This is the wiring diagram I got when I asked for one. Pretty average but may help

Edit: Just noticed that's the one you already posted... O well, that's what I get for not checking first!

 

[marcn]

I usually dislike resurrecting old threads, but this one is too good not too.

Were there any failures after the bike was given back to the customer, eg, motor overheating and dying, chain/gears not handling the setup?

 

[Kiwi]

He put a rolloff hub in the back, didnt have any motor heat issues at 48v 22amps. Cycle Analyst is great to show you when you are pulling lots of current, so you change down some gears.

 

[marcn]

Great,

I could see this working very well with the Nuvinci.

 

[chris...]

So you are saying the motor and gearbox can handle more power, 15-20 amps you say with the stock controller????
How can we increase the power on these bikes?

EDIT: worked it out