Search found 1486 matches

by Mark_A_W
Feb 08 2011 4:12pm
Forum: E-Bike Technical
Topic: Mac 500w motor issues
Replies: 31
Views: 2503

Re: Mac 500w motor issues

Paul I agree with you. While I did kill the nylon gears, the occasional clutch locking problem is minor, and it's a BMC clutch anyway. Very occasionally, when I let go of the throttle, I can still hear the motor spinning. This happens about once every 3 weeks, and a squirt of throttle fixes it. Over...
by Mark_A_W
Feb 07 2011 9:21pm
Forum: E-Bike Technical
Topic: Mac 500w motor issues
Replies: 31
Views: 2503

Re: Mac 500w motor issues

They are probably fine at 500w, but at 1500w the clutch is under more load than intended...
by Mark_A_W
Feb 06 2011 7:50pm
Forum: E-Bike Technical
Topic: Mac 500w motor issues
Replies: 31
Views: 2503

Re: Mac 500w motor issues

Open it up and WD-40 the clutch.


Sometimes they jam on. Mine does it on and off (both with the MAC clutch and now with the BMC V3 clutch), but only temporarily.
by Mark_A_W
Feb 02 2011 8:56pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Giant NRS FS 55.5v E-Bikekit build. (IN FRAME BAG!)
Replies: 36
Views: 3870

Re: Giant NRS1/9C hub/44v E-Bikekit build. (Warning: XL Imag

I feel like a broken record.. Do a search on cantilever or rear racks and you'll see that they pretty much all fail in the end. Dogman's was about the only one that didn't, it had big struts back to the frame. I made my rack strong enough that the frame broke. Put the batteries in the triangle. Just...
by Mark_A_W
Feb 02 2011 7:21pm
Forum: E-Bike General Discussion
Topic: 8-piston gator brakes -
Replies: 37
Views: 5974

Re: 8-piston gator brakes -

I have Juicy 7's and I'd struggle (luckily) to lock the front hookwoom tyre up on dry bitumen, with an 8" rotor. The total weight of me/bike/backpack is about 135kgs.


It does depend on the pads and the rotor itself, from my experience. For some reason a new rotor is grippier than an old one.
by Mark_A_W
Feb 02 2011 6:53am
Forum: E-Bike General Discussion
Topic: What's your top continuous (cruising) speed?
Replies: 25
Views: 1795

Re: What's your top continuous (cruising) speed?

She can say all she likes, even if you copy it EXACTLY they can't do a thing about it unless you try and sell it. They certainly can, if they wanted to. Depends on the country. Even in the US I don't think anyone ever gets done over for patent infringement for personal use. http://www.iusmentis.com...
by Mark_A_W
Feb 02 2011 6:27am
Forum: E-Bike Build Threads / Photos & Video
Topic: Operation: Bazooka
Replies: 72
Views: 7086

Re: Operation: Bazooka

To tell you the truth the mudguards were the hardest bit on my bike...

I think you'll find you need to move them closer to the wheel. Up high like that they are almost useless.
by Mark_A_W
Feb 02 2011 6:22am
Forum: E-Bike Non-hub Motor Drives
Topic: InterestingTiBikeFabricationJigAnd 4"LongTravelSoftail's
Replies: 19
Views: 1545

Re: InterestingTiBikeFabricationJigAnd 4"LongTravelSoftail's

The flex in those stays are in a direction resistant to torsional flex. Picture pivots there, not flex points and that may help a bit. Flex can be designed into a system in a manor that is directional. The term flex can be confusing. Matt Agree but.. That flex plate allows more "degrees of freedom"...
by Mark_A_W
Feb 02 2011 4:58am
Forum: E-Bike General Discussion
Topic: What's your top continuous (cruising) speed?
Replies: 25
Views: 1795

Re: What's your top continuous (cruising) speed?

city goes. :) I'm thinking pretty hard about a 8 x 8 9C as my "monkey" motor. Had a nice chat with an older Lady at Clever Cycles today, and she warned me not to copy the "Stoke Monkey" too closely since they just renewed the patent (good naturedly :wink: ) but she said she's more of the riding tha...
by Mark_A_W
Feb 02 2011 4:56am
Forum: E-Bike General Discussion
Topic: What's your top continuous (cruising) speed?
Replies: 25
Views: 1795

Re: What's your top continuous (cruising) speed?

Steady cruising speed = 55km/h at 1400w, motor will do this all day long....well for about 24 minutes actually, then the battery is flat.

That gives me an average speed just over 40, with all the pesky traffic and stops and starts.
by Mark_A_W
Feb 02 2011 4:47am
Forum: E-Bike General Discussion
Topic: 8-piston gator brakes -
Replies: 37
Views: 5974

Re: 8-piston gator brakes -

... I'm a professional mechanical engineer too, and I think you are wrong!! I have never seen a Mech Eng claim (or even admit) to be an Unprofessional Engineer, so why with the "Professional" bit? Well, now that you mention it....I can be a bit of a cowboy... I guess it implies that you actually wo...
by Mark_A_W
Feb 02 2011 1:14am
Forum: E-Bike General Discussion
Topic: 8-piston gator brakes -
Replies: 37
Views: 5974

Re: 8-piston gator brakes -

The original poster stated that he "squeezed the brakes as hard as he could" in this test. So the mechanical force is constant based only on the operator's strength. The mechanical advantage of the brake lever is constant. And the hydraulic pressure is therefore a constant in this case. This is fun...
by Mark_A_W
Jan 30 2011 8:54pm
Forum: E-Bike Non-hub Motor Drives
Topic: Specialized FSR, Cyclone 1900w (pics 1st page)
Replies: 153
Views: 20017

Re: Specialized FSR frame surgery

Sorry to burst your bubble, but a mongoose pro and a jamis dakar are each crap bikes. The Kona Dawg is a decent frame for its intended use. If you want to compare apples to apples, compare your team DH to a kona supreme operator which also weighs in the neighbourhood of 40-45 lbs, but uses a simila...
by Mark_A_W
Jan 30 2011 7:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: Specialized FSR, Cyclone 1900w (pics 1st page)
Replies: 153
Views: 20017

Re: Specialized FSR frame surgery

Paul For your custom frame, I think you should look at the solid rear end that's on my Giant DH team (see link in signature below). It is technically multi-link, but the swing arm is solid, one moving part for both stays, with a huge pivot. I've had 4 fully susser e-bikes now, and it's the only one...
by Mark_A_W
Jan 30 2011 7:32am
Forum: E-Bike Build Threads / Photos & Video
Topic: Mark_A_W's DH Team/MAC Shanghai/64v Headway build
Replies: 244
Views: 31814

Re: Mark_A_W's DH Team/MAC Shanghai/64v Headway build

Just a shameless bump....I mean update: - Couple of thousand k's now, BMC gears are still holding up - Had another failed tab weld on the headway pack, which killed another BMS...that's two now. - So now I'm running without a BMS, which means some of the cells get cooked (over 4v) when charging - bu...
by Mark_A_W
Jan 28 2011 3:43am
Forum: E-Bike Non-hub Motor Drives
Topic: Specialized FSR, Cyclone 1900w (pics 1st page)
Replies: 153
Views: 20017

Re: Specialized FSR frame surgery

Paul For your custom frame, I think you should look at the solid rear end that's on my Giant DH team (see link in signature below). It is technically multi-link, but the swing arm is solid, one moving part for both stays, with a huge pivot. I've had 4 fully susser e-bikes now, and it's the only one ...
by Mark_A_W
Jan 27 2011 8:44pm
Forum: E-Bike Build Threads / Photos & Video
Topic: GT i-drive 2.0 Build
Replies: 3002
Views: 320830

Re: GT i-drive 2.0 Build

before we lose power i thought i'd upload a pic of what things are looking like now. Wow that's a cool picture (if you'll pardon the pun!) I'm guessing it's a long exposure from the flare around the lights ? It looks almost like it was shot on an IR converted camera. The whole concept of having to ...
by Mark_A_W
Jan 25 2011 4:23am
Forum: E-Bike Build Threads / Photos & Video
Topic: Operation: Bazooka
Replies: 72
Views: 7086

Re: Operation: Bazooka

Jay, don't cut the steerer.
Just swap the spacers to the top and fit the stem below them - that will get the stem lower, which is what you want.

It's very hard to make a steerer tube longer later...
by Mark_A_W
Jan 23 2011 3:22pm
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16312
Views: 1475374

Re: E-S Stealth Electric Bike Owners

I believe this bike shares the same problem: http://www.stealthelectricbikes.com/applications.html wtf? there is no way you can get this bike street legal like this, especially in Germany, Switzerland and the Netherlands... Vodka. Bugger off and piss in someone else's puddle. I fail to see how your...
by Mark_A_W
Jan 13 2011 8:41pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Operation: Bazooka
Replies: 72
Views: 7086

Re: Operation: Bazooka

We are getting 15 years rain in one week.

I can't believe you rode :shock:
by Mark_A_W
Jan 13 2011 8:36pm
Forum: E-Bike Build Threads / Photos & Video
Topic: NRS frame for new e-bike project
Replies: 17
Views: 3308

Re: NRS frame for new e-bike project

I'd be careful with this frame - I've busted two XC dually frames now, one on the chainstay. Those webbings to the bearing on the chainstay look very weak, I would find a way to reinforce them. IMO only a heavy DH frame is suitable for an ebike, XC duallies are too lightly built. Also, in my experie...
by Mark_A_W
Jan 12 2011 12:34am
Forum: E-Bike General Discussion
Topic: neoprene a good material to protect battery?
Replies: 10
Views: 715

Re: neoprene a good material to protect battery?

MadRhino wrote:I used the GF yoga carpet, to pad the box that contains my Lipo. She was mad, but forgave me short after. 8)
+1

Guilty as charged. She's still grumpy about the missing corner of her mat (that she NEVER uses).
by Mark_A_W
Jan 12 2011 12:00am
Forum: E-Bike Build Threads / Photos & Video
Topic: Operation: Bazooka
Replies: 72
Views: 7086

Re: Operation: Bazooka

Jay, I just tap the headset in using a hammer and a block of wood (you hit the wood!) - with the frame resting very carefully on another block of wood on the vice.

It's it's on the piss, don't force it. That's all you need to know.
by Mark_A_W
Jan 11 2011 7:29pm
Forum: E-Bike Build Threads / Photos & Video
Topic: E-S Stealth Electric Bike Owners
Replies: 16312
Views: 1475374

Re: E-S Stealth Electric Bike Owners

Yes, maybe just.

To average 40kmh I have to travel at over 50kmh - it depends on the route.