Search found 3286 matches

by motomech
Aug 15 2019 6:44pm
Forum: E-Bike General Discussion
Topic: Largest capacity for battery packs??
Replies: 9
Views: 349

Re: Largest capacity for battery packs??

At some point, the pack starts to get too heavy. It depends on the bike, wheels, tires and what you want to do. WHen I started I had noobie range anxity and packed my bike w/ 25 Ah's of battery, but over time, I learned what it takes to go where and now 15 Ah is plenty and my ebike feels like a bicy...
by motomech
Aug 15 2019 3:59pm
Forum: E-Bike Technical
Topic: 17a or 20a controller?
Replies: 13
Views: 267

Re: 17a or 20a controller?

I've been using both the 17A and the 20A controllers from PSW Power on Q100's (Cutes) for years and my experience with them are; Note; They are the 9-FET Non-sine wave versions with a simple LED display (that I prefer). The Q100's are about the same size as that Bafang mini, if anything, slightly sm...
by motomech
Aug 13 2019 11:16pm
Forum: E-Bike Technical
Topic: Help me disassemble this aikema motor
Replies: 11
Views: 270

Re: Help me disassemble this aikema motor

To "crest" the hill- go over the top. You are really stuck on the "efficiency" thing, throwing out percentages of efficiency and Watts of heating and I'm telling you what I've learned using more than a half a dozen Cutes over 7 years (since they first came out). I will say this about efficiency as i...
by motomech
Aug 13 2019 3:29pm
Forum: E-Bike Technical
Topic: Help me disassemble this aikema motor
Replies: 11
Views: 270

Re: Help me disassemble this aikema motor

I saw one of those crude solutions (however the target motor was different). My problem with this is that I simply have nothing with which to make a 35mm hole into metal. Thus my option is some hard wood with perhaps a metal plate added to the side to reinforce it (a plate that only has a hole for ...
by motomech
Aug 13 2019 6:33am
Forum: E-Bike Technical
Topic: Help me disassemble this aikema motor
Replies: 11
Views: 270

Re: Help me disassemble this aikema motor

https://endless-sphere.com/forums/download/file.php?id=143199 I've seen a much cruder version consisting of a rectangle piece of flat steel (approx. 1/4" thick) w/ a hole cut in one end to slip over the axle. The rough edges leads me to believe it was cut w/ an act/oyx torch. The three "tangs" consi...
by motomech
Aug 12 2019 4:22pm
Forum: E-Bike Technical
Topic: Help me disassemble this aikema motor
Replies: 11
Views: 270

Re: Help me disassemble this aikema motor

Aside from the clutch (springs), there's nothing you can repair inside the motor. Even the smallest/simplist part, the Hall sensor(s), can not be replaced on the Q100. From what you are describing, it's more likely the controller has developed a problem. Also, ck the phase wires to make sure they di...
by motomech
Aug 11 2019 12:23am
Forum: E-Bike Build Threads / Photos & Video
Topic: PWD's Rocky Mountain Element - refresh
Replies: 30
Views: 1878

Re: PWD's Rocky Mountain Element - refresh

I bought an extra large bike with a high top tube in order to stuff as much battery in the frame as possible. But w/ a 30" inseam, that fore-mentioned top tube was uncomfortably close to the Family Jewels. I went from a 26 X 2.0 tire to a 24 X 2.4, both ends. Due to the larger size of the 24" tire, ...
by motomech
Aug 06 2019 10:25pm
Forum: Battery Technology
Topic: Trustworthy Lipo vendors
Replies: 6
Views: 155

Re: Trustworthy Lipo vendors

Hobby King has a US warehouse, which is a good thing because most of us here consider it to be the only place to buy LiPoly bricks.
by motomech
Jul 30 2019 11:06pm
Forum: E-Bike General Discussion
Topic: Do you prefer freewheel or cassettte for your hub motor?
Replies: 19
Views: 821

Re: Do you prefer freewheel or cassettte for your hub motor?

I believe most Ebike riders are not super strong riders, if they wear Lycra, they most likely would not have a motor. For the majority of riders who commute, or ride to the store or to get some exercise, the DNP works fine.
by motomech
Jul 30 2019 10:42pm
Forum: E-Bike General Discussion
Topic: Troubleshooting shorted throttle controller
Replies: 11
Views: 202

Re: Troubleshooting shorted throttle controller

That's not the throttle you linked, it's a display. So I not sure which you are asking about. I'm guessing you are talking about the display and if you are trying to find the pos. and neg. feeds, I don't know what to tell you. Pretty sure both the display and the controller need to be hooked up befo...
by motomech
Jul 26 2019 7:42pm
Forum: E-Bike General Discussion
Topic: Do you prefer freewheel or cassettte for your hub motor?
Replies: 19
Views: 821

Re: Do you prefer freewheel or cassettte for your hub motor?

W/ a 30% narrower stator, one would think the "C" model would be a "weak sister", but in practice, one doesn't notice a huge drop-off. But we are talking low-power set-up, something like 48V X 15A and no doubt the "H" would take more than the "C". When we talk about why the C does so well, brings up...
by motomech
Jul 24 2019 12:44pm
Forum: E-Bike General Discussion
Topic: Tropical Mountain & Beach Daily Driver
Replies: 23
Views: 644

Re: Tropical Mountain & Beach Daily Driver

Although I owned a Jeep (money pit) and a Bronco (totaled), most of the time I rode motorcycles. One nice thing about CR, is non-residents can own vehicles. By far, the easiest and cheapest way to get around is to buy a new 150cc to 200cc Chinese enduro for $1500 to $2000 US. Every sm. city (like L...
by motomech
Jul 24 2019 1:45am
Forum: E-Bike General Discussion
Topic: Do you prefer freewheel or cassettte for your hub motor?
Replies: 19
Views: 821

Re: Do you prefer freewheel or cassettte for your hub motor?

The most common breakage I remember seeing here were early (ish) hub motors where the free whl. threaded mounting boss broke off. At any rate, I let the motor do most of the work and I don't pedal hard enough to break anything, so my likes and dis-likes are more mundane. The DNP is better than the r...
by motomech
Jul 23 2019 2:14pm
Forum: E-Bike General Discussion
Topic: Schwalbe Tire's
Replies: 15
Views: 865

Re: Schwalbe Tire's

The Alex DM24 IS available in a 24 inch size.
by motomech
Jul 22 2019 8:56pm
Forum: E-Bike Technical
Topic: New build, motor cuts off
Replies: 4
Views: 187

Re: New build, motor cuts off

I don't have a throttle but only pas. Then ck your PAS installation, both electrically and physically. Make sure the disc and sensor are still close together and ck the output of the sensor. Three wires; One will be 5V postive One will be neg. One will be a signal. Ck first that you have 5 V DC in ...
by motomech
Jul 22 2019 8:48pm
Forum: E-Bike Technical
Topic: Modifying a shunt with controlled results
Replies: 58
Views: 18304

Re: Modifying a shunt with controlled results

No point in telling us what you do in your country if you don't fill out your profile and tell us what country that is.
by motomech
Jul 22 2019 8:06pm
Forum: E-Bike Technical
Topic: Who here recommends a Nipple Torque Wrench?
Replies: 5
Views: 186

Re: Who here recommends a Nipple Torque Wrench?

You don't need a "kit" if all you will ever do are are 10 Ga. spokes.
I believe that is a motorcycle size and I would recommend you just stop into a motorcycle dealership/accessory store and buy a regular spoke wrench. They are cheap.
by motomech
Jul 22 2019 7:59pm
Forum: E-Bike General Discussion
Topic: Schwalbe Tire's
Replies: 15
Views: 865

Re: Schwalbe Tire's

Back story: I rode 18km for an appointment, rained hard and hid under a tree. Can't do that all day, the rain slowed down. I was into the valley park and 1 or 2km away from being under the bridge when the hail came and it came hard. Hoody sweater + semi-light poly saved everything but the face. The...
by motomech
Jul 22 2019 7:31pm
Forum: E-Bike Technical
Topic: Wheel balancing questions?
Replies: 6
Views: 236

Re: Wheel balancing questions?

At the speeds most ebikes go, balancing is not needed.
What is needed, is for the wheel to be true (round) and that's the challenge.
by motomech
Jul 22 2019 6:47pm
Forum: E-Bike General Discussion
Topic: Tropical Mountain & Beach Daily Driver
Replies: 23
Views: 644

Re: Tropical Mountain & Beach Daily Driver

I lived and worked all over Latin Amer. for 20 years, 7 of those years in Playa de Coco (Playa de Locos), Guanacaste (NW CR). A lot of those places, I shipped an Ebike because the Co. I was working for was shipping a container anyway, but I didn't have an Ebike in CR and I don't think it would have ...
by motomech
Jul 18 2019 11:14am
Forum: E-Bike Build Threads / Photos & Video
Topic: Adventures On The Cheap
Replies: 71
Views: 3027

Re: Adventures On The Cheap

Even the "Q" spacer can be used unmodified if it is installed w/ the tang facing inwards.
by motomech
Jul 18 2019 1:51am
Forum: E-Bike Technical
Topic: Lightweight 250w 700c 120mm Rear Hub Motor on a Budget
Replies: 6
Views: 342

Re: Lightweight 250w 700c 120mm Rear Hub Motor on a Budget

A Q100 for rear fitment can be mod'ed down to fit a 125 m/m dropout by cutting the lip of the spline right up to the recessed bearing, but of course the cassette/free whl. would have to be cut-down as well because a 16T "fixie" won't work w/out a lot of machining. It is possible to ptu a single gear...
by motomech
Jul 18 2019 1:32am
Forum: E-Bike Build Threads / Photos & Video
Topic: Adventures On The Cheap
Replies: 71
Views: 3027

Re: Adventures On The Cheap

The flat washer(s), which ARE readily available in hardware stores(they might even be Amer. Standard size, doesn't matter w/ washers), go between the the spline end of the cassette/free whl. and the inside of the dropout. it rests against the recessed bearing and the bare metal of the dropout, movin...
by motomech
Jul 16 2019 12:48am
Forum: E-Bike General Discussion
Topic: How should I measure for replacement hub motor bearings?
Replies: 5
Views: 187

Re: How should I measure for replacement hub motor bearings?

Most bearings have a 4 digit reference # on the outside race.
Or just take it to a bearing, belt and chain store and let them match it up.
The Japanese and German marks are the best quality.
by motomech
Jun 20 2019 10:32pm
Forum: E-Bike Reviews & Testing
Topic: Luna 52v Wolf Batterty / Hobby king turnigy review.
Replies: 11
Views: 1157

Re: Luna 52v Wolf Batterty / Hobby king turnigy review.

Planning ahead when buying LiPoly from Hobbyking can pay dividends. They don't offer the continuous stream of discounted makes and sizes they use to, but they still have smaller intermittent sales. Start ck'ing early and to avoid using their awful website, Google the brand and size you have in mind ...