Search found 680 matches

by Grantmac
Jan 16 2020 11:44am
Forum: E-Vehicles General Discussion
Topic: KTM giving up on gas
Replies: 17
Views: 3300

Re: KTM giving up on gas

The third bike down under E-scooters is looking very interesting. Like a sleeker Light-Bee.

Personally I'd like to see some electric "play bike" options inline with the KTM Freeride or possibly for the 150cc motocross class.
by Grantmac
Jan 14 2020 7:54pm
Forum: E-Vehicles General Discussion
Topic: true cost?
Replies: 14
Views: 1507

Re: true cost?

I drove a TDI for 150,000miles until it was written off. If they made an AWD TDI Golf wagon I'd be driving one still.
Mine only needed regular maintenance as most do under a half million miles.
by Grantmac
Jan 13 2020 7:59pm
Forum: E-Bike General Discussion
Topic: looking for ideas for an Ebike build
Replies: 18
Views: 798

Re: looking for ideas for an Ebike build

Several 2-5kw mid drives.

A heavy setup like that will ruin whatever rear suspension performance the bike has.
by Grantmac
Jan 13 2020 3:43pm
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 94
Views: 16534

Re: OpenEMoto

You might look at the QS motors, probably the "2kw". They are working well for light motorcycles.
by Grantmac
Jan 13 2020 3:41pm
Forum: E-Bike General Discussion
Topic: looking for ideas for an Ebike build
Replies: 18
Views: 798

Re: looking for ideas for an Ebike build

Rough surface? If so you'll want a mid drive over a hub.
by Grantmac
Jan 13 2020 12:53pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Chinese Pit Bike Conversion | Nucular 12F | LMX-Motor 60mm | 18s 16Ah LiPo
Replies: 33
Views: 4871

Re: Chinese Pit Bike Conversion | Nucular 12F | LMX-Motor 60mm | 18s 16Ah LiPo

Yes you have it precisely! I hadn't thought of tooth engagement but I don't think it would be very significant. I can envision a version which uses a simple linkage to increase engagement but putting that into words is more challenging. Having as much slack as possible without tossing chains is defi...
by Grantmac
Jan 13 2020 12:24pm
Forum: E-Bike General Discussion
Topic: looking for ideas for an Ebike build
Replies: 18
Views: 798

Re: looking for ideas for an Ebike build

What kind of trails are you riding?
by Grantmac
Jan 07 2020 10:45pm
Forum: E-Bike Non-hub Motor Drives
Topic: PaulD's lightweight mid drive development
Replies: 100
Views: 17058

Re: PaulD's lightweight mid drive development

Still running the BAC500? What sort of torque figures?
by Grantmac
Jan 06 2020 3:31pm
Forum: Large EV General Discussion
Topic: Excellent information about diy Tesla Drive use
Replies: 9
Views: 910

Re: Excellent information about diy Tesla Drive use

A powerful 818 EV is something I've been hoping for although I'd prefer to keep one RWD with modest power rather than an AWD missile. 250kw would be lots.
by Grantmac
Jan 04 2020 3:57pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Chinese Pit Bike Conversion | Nucular 12F | LMX-Motor 60mm | 18s 16Ah LiPo
Replies: 33
Views: 4871

Re: Chinese Pit Bike Conversion | Nucular 12F | LMX-Motor 60mm | 18s 16Ah LiPo

I'm not good at expressing myself with pictures so I will try to explain the tensioner I propose better. It would sit between the swingarm pivot and the motor sprocket and be mounted on the swingarm so that as the suspension is compressed it comes into contact with the lower chain to take up the sla...
by Grantmac
Jan 02 2020 5:54pm
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3298
Views: 406426

Re: new cyclone 3000 w mid-drive kit?

Build one using some aluminum plate, all you need is a hacksaw and drill.
by Grantmac
Jan 02 2020 12:27am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3298
Views: 406426

Re: new cyclone 3000 w mid-drive kit?

Best thing to do with that thin bracket is toss it in the garbage.
by Grantmac
Jan 01 2020 3:48pm
Forum: E-Bike General Discussion
Topic: Segway vs. Sur-ron?
Replies: 8
Views: 1704

Re: Segway vs. Sur-ron?

I'd take a one-wheel over an e-skate, e-scoot or segway for commuting. Probably over an ebike for commutes under 2-3 miles or if able to use public transport to boost range.
They are intuitive and able to tackle surprisingly rough terrain.
by Grantmac
Dec 30 2019 9:52pm
Forum: E-Bike Non-hub Motor Drives
Topic: YALU New BBS-Style mid drive kit with external controler
Replies: 47
Views: 5362

Re: YALU New BBS-Style mid drive kit with external controler

Zgal48 wrote:
Dec 30 2019 6:40pm
Grantmac wrote:
Dec 22 2019 5:36pm
Have the people who've received these weighed them? 8kg seems a lot compared to similar drives.

Zgal48:
What amp rating is the controller you used?
I'm just using 35 amp controller 72volts.
Did you weigh the drive when you had it out? Gear version without two chains right?
by Grantmac
Dec 30 2019 12:48pm
Forum: Battery Technology
Topic: Bolted Busbar battery pack for 18650
Replies: 6
Views: 489

Re: Bolted Busbar battery pack for 18650

Before going to extensive solutions look at how people use a sandwich of copper under nickel to spot weld.
by Grantmac
Dec 29 2019 1:34pm
Forum: E-Bike Non-hub Motor Drives
Topic: BUILDING A MOTOR and Axel Borg - SAFE?
Replies: 4
Views: 399

Re: BUILDING A MOTOR and Axel Borg - SAFE?

If you're looking to scratch build a bike then $19 shouldn't even register on the list of expenses.
by Grantmac
Dec 29 2019 1:40am
Forum: E-Vehicles General Discussion
Topic: true cost?
Replies: 14
Views: 1507

Re: true cost?

A lot of people ask "When will it pay for itself?" which is a silly question - I have never seen a car reach into it's pocket and pull out it's wallet and buy itself from the showroom floor. Not yet, but that's one of the Tesla's promises when you add your vehicle to the pool of their autonomous ta...
by Grantmac
Dec 28 2019 8:26pm
Forum: Motor Technology
Topic: More than3 phases
Replies: 35
Views: 2498

Re: More than3 phases

I had my pole vs stator terminology mixed up but it seems you understood what I was grasping at.

That Astro is a very interesting wind. Overlapping fields but looks like a lot of unused space in the stator.
by Grantmac
Dec 28 2019 3:43pm
Forum: E-Bike Technical
Topic: Where would you place a 72v 25ah battery on this frame?
Replies: 22
Views: 1218

Re: Where would you place a 72v 25ah battery on this frame?

4 extended down towards the cranks. plus some in the frame.
Shame you are going hub, that's a great frame for a mid.
by Grantmac
Dec 28 2019 3:41pm
Forum: E-Bike General Discussion
Topic: If you had $3500 to $4000
Replies: 25
Views: 1506

Re: If you had $3500 to $4000

One of the members on a few of the FB ebike forums will be bringing them stateside. Looks like 6-7000 complete. Might be able to it cheaper DIY (I could).
by Grantmac
Dec 28 2019 1:39pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 4470
Views: 437941

Re: Sur-Ron - New Mid drive Bike

I think the guy who built the hard "saddle bag" parallel batteries in pelican cases has a brilliant idea. No need to ditch the stock battery when you can simply parallel another BMS and run double the power. Would be even better in some custom molded lightweight enclosures. The item which I really t...
by Grantmac
Dec 28 2019 1:32pm
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3298
Views: 406426

Re: new cyclone 3000 w mid-drive kit?

I'm not interested in the swingarm or co-axle motor, but that belt setup has some parts that I hope become available.
by Grantmac
Dec 28 2019 1:26pm
Forum: Motor Technology
Topic: More than3 phases
Replies: 35
Views: 2498

Re: More than3 phases

I'm imagining that if you ran just one set of 3 phases there would be a gap between the poles. Wouldn't that lead to a faster "jump" towards the next magnet? Perhaps I'm seeing it wrong. The phases should have lower resistance though because of shorter windings so KV will be affected somewhat. Being...
by Grantmac
Dec 28 2019 1:12pm
Forum: E-Bike General Discussion
Topic: If you had $3500 to $4000
Replies: 25
Views: 1506

Re: If you had $3500 to $4000

An old enduro motorcycle isn't great offroad, adding an underpowered hub will just make it much worse and end up costing similar to a Sur-ron which people have licensed. If you're going to go through the motions of doing a motorcycle to EV project then the added cost of a modern bike and decent driv...
by Grantmac
Dec 28 2019 1:01pm
Forum: E-Vehicles General Discussion
Topic: true cost?
Replies: 14
Views: 1507

Re: true cost?

I buy 10-15 year old cars for ~$5000 and keep them 5 years then sell for ~$3000. I do no major maintenance beyond timing belts. I don't carry collision insurance since that will be the cost of the car in 5 years and if I use it for an at-fault accident my rates will double. Its going to be a long ti...