Search found 635 matches

by Grantmac
Dec 12 2019 8:04pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cnc/carbon mid drive (vesc, 6374/80100 Motor)
Replies: 15
Views: 813

Re: Cnc/carbon mid drive (vesc, 6374/80100 Motor)

I was going to use a center lock to 6 bolt adapter the mount off the back side. Not sure it will be strong enough though.
Your adapter is beautiful, makes my manual machining look very rough.
by Grantmac
Dec 12 2019 12:27pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Honda CRF250R Conversion "The CRE?"
Replies: 7
Views: 387

Re: Honda CRF250R Conversion "The CRE?"

I've seen batteries mounted in the space where the radiators were. More of a modular setup though.
by Grantmac
Dec 12 2019 12:19pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Selfmade E-Hardtail (Just have a look ;)
Replies: 7
Views: 422

Re: Selfmade E-Hardtail (Just have a look ;)

Any plans for a suspension version? How is the noise level?
by Grantmac
Dec 12 2019 12:16pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cnc/carbon mid drive (vesc, 6374/80100 Motor)
Replies: 15
Views: 813

Re: Cnc/carbon mid drive (vesc, 6374/80100 Motor)

It fits around the spline created by the brake mounting fixture correct? I've had something similar in mind and another design using a centerlock hub to get it bolted behind that area.
by Grantmac
Dec 12 2019 11:38am
Forum: E-Vehicles General Discussion
Topic: Question for engineers and EV geeks: What are the advantages for a car being designed as a BEV only?
Replies: 6
Views: 137

Re: Question for engineers and EV geeks: What are the advantages for a car being designed as a BEV only?

Batteries and motors can't be almost anywhere unless you don't mind having the handling of a forklift. Batteries need to be low and centralized, which is also where the people want to be. You can make them part of the structure but only if you are confident they will never need replacement. Motors e...
by Grantmac
Dec 09 2019 4:29pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cnc/carbon mid drive (vesc, 6374/80100 Motor)
Replies: 15
Views: 813

Re: Cnc/carbon mid drive (vesc, 6374/80100 Motor)

Would you sell that adapter? It's exactly what I've been looking for.
by Grantmac
Dec 09 2019 1:38pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Honda CRF250R Conversion "The CRE?"
Replies: 7
Views: 387

Re: Honda CRF250R Conversion "The CRE?"

With the larger rear sprocket you may be able to get away with a higher front sprocket since you should have a fair amount of anti-squat.
by Grantmac
Dec 08 2019 7:34pm
Forum: E-Bike General Discussion
Topic: Regen
Replies: 41
Views: 863

Re: Regen

You keep describing exactly the situation where gearing works exceptionally well.
by Grantmac
Dec 08 2019 1:39pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hubs for left side drives?
Replies: 11
Views: 621

Re: Hubs for left side drives?

I now have a Velocity hub with excellent bearings. I always buy extra bearings because they may stop making them. Since when? Most bearings used in cycle components are industrially standard parts that will be available long after the parts they go into are out of production. Some of the weirder be...
by Grantmac
Dec 07 2019 8:06pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cnc/carbon mid drive (vesc, 6374/80100 Motor)
Replies: 15
Views: 813

Re: Cnc/carbon mid drive (vesc, 6374/80100 Motor)

I mean how you run both a brake disc and sprocket.
by Grantmac
Dec 07 2019 2:41pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Cnc/carbon mid drive (vesc, 6374/80100 Motor)
Replies: 15
Views: 813

Re: Cnc/carbon mid drive (vesc, 6374/80100 Motor)

Zeurus wrote:
Dec 07 2019 2:05pm
SlowCo: thx :)

Grantmac: squat wasnt that bad, but my brother had problems with his clothes getting in the chain XD
Yes that would be a bit too exciting!

Any chance of a hub picture? These are amazing builds.
by Grantmac
Dec 07 2019 2:38pm
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 18kw kit
Replies: 7
Views: 231

Re: Cyclone 18kw kit

100mph isn't happening with an EEB or 18kw for that matter.
by Grantmac
Dec 07 2019 12:37pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 2016 Electric Motion EM 5.7 Upgrade
Replies: 8
Views: 385

Re: 2016 Electric Motion EM 5.7 Upgrade

Increasing voltage will allow you to lower gearing without losing top speed. Also changing controllers for higher phase amps and faster response should make a difference. Additionally I believe that Emotion offered an electronic clutch which allows you to dial the throttle then "engage" it by releas...
by Grantmac
Dec 07 2019 12:32pm
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 18kw kit
Replies: 7
Views: 231

Re: Cyclone 18kw kit

Look at the Lightning Rods LHD setup. Either as a complete option or inspiration.
by Grantmac
Dec 06 2019 12:21pm
Forum: E-Bike General Discussion
Topic: Max comfortable width of pack mounted in triangle
Replies: 21
Views: 449

Re: Max comfortable width of pack mounted in triangle

Keep in mind one person's "offroad" is another's walking path. So be careful which advice you follow. Me personally I want it under 5" at top tube height, perhaps slightly more on the downtube but not much. Be careful to take into account suspension travel if you are going to do any real offroading....
by Grantmac
Dec 02 2019 5:06pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hubs for left side drives?
Replies: 11
Views: 621

Re: Hubs for left side drives?

150x12mm DH hub will clear 3" tires depending on the rim.
by Grantmac
Nov 30 2019 2:51pm
Forum: E-Bike General Discussion
Topic: E-S LMX 64 Bike Owners
Replies: 296
Views: 20081

Re: E-S LMX 64 Bike Owners

I'll be interested to see if there is much of an efficiency reduction especially with that much wrap around the idler.

On the other hand with that much wrap you almost don't need teeth on the rear sprocket so wear should be very low.
by Grantmac
Nov 29 2019 7:40pm
Forum: E-Bike Build Threads / Photos & Video
Topic: New user introduction and build Qs v3 205 + cyc x1 pro dual drive bomber frame build
Replies: 6
Views: 243

Re: New user introduction and build Qs v3 205 + cyc x1 pro dual drive bomber frame build

That rear hub will not be a good choice on rough terrain. Put the money into more battery and controller for the cyc, it can take it.
by Grantmac
Nov 29 2019 3:39pm
Forum: E-Bike Non-hub Motor Drives
Topic: What kind of Salvage motors should I look for?
Replies: 7
Views: 282

Re: What kind of Salvage motors should I look for?

Compared to a repurposed washing machine motor its a doodle. The stock mounting just needs some help.
by Grantmac
Nov 29 2019 1:27pm
Forum: E-Bike Non-hub Motor Drives
Topic: What kind of Salvage motors should I look for?
Replies: 7
Views: 282

Re: What kind of Salvage motors should I look for?

I think by the time you buy all the accessories to make a salvage motor run as a mid-drive the Cyclone will seem like a reasonable price. It isn't great but it works and so long as you aren't running it full tilt it's reliable (I commute one).
by Grantmac
Nov 28 2019 1:01pm
Forum: E-Bike Non-hub Motor Drives
Topic: 250W RC belt drive - how to pick voltage/gearing for best efficiency
Replies: 16
Views: 571

Re: 250W RC belt drive - how to pick voltage/gearing for best efficiency

Rather than driving the cranks via a separate chain and chainwheel you could look at a "chain puller" style. Depending on wattage you might still need a freewheel. Also you'd need a gearbox but at that wattage they are easily found in the robotics field for reasonable prices or could be done with mu...
by Grantmac
Nov 28 2019 12:38pm
Forum: E-Bike General Discussion
Topic: E-S LMX 64 Bike Owners
Replies: 296
Views: 20081

Re: E-S LMX 64 Bike Owners

Given that dB is a logarithmic scale that is a HUGE noise decrease. My thought is going for the large amount of wrap around both sprockets should allow slightly less tension and also keep rocks out of the drivetain. My one concern would be replacing a custom on-off rear sprocket. I have an idea for ...
by Grantmac
Nov 27 2019 9:46pm
Forum: E-Bike General Discussion
Topic: E-S LMX 64 Bike Owners
Replies: 296
Views: 20081

Re: E-S LMX 64 Bike Owners

Have you considered the Gates split belt design? It seems to make for lighter pulleys which also shed dirt.
by Grantmac
Nov 27 2019 11:54am
Forum: E-Bike Non-hub Motor Drives
Topic: 1.7kg 1000w mid drive
Replies: 7
Views: 722

Re: 1.7kg 1000w mid drive

The 1kw isn't out of the question, look at CYC pulling +5kw out of a motor weighing perhaps 3x that much not to mention the Tangent builds. I'm sure that keeping it spinning is part of the equation so gear selection will be important. I'm interested to see how much reduction it has and what sort of ...
by Grantmac
Nov 27 2019 11:32am
Forum: Battery Technology
Topic: Reduce noise of fanned charger
Replies: 7
Views: 417

Re: Reduce noise of fanned charger

Replace with a Meanwell. Then you have both waterproof and fanless.