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Messages - cavi

Pages: [1]
1
General Discussion / Re: Newbie from California itching to get started
« on: August 20, 2009, 06:38:33 AM »
also, where  are you iwth your project?  BTW I live in Red Bluff, about 2 hours north of Sacramento, so maybe we can compare notes.

2
General Discussion / Re: Newbie from California itching to get started
« on: August 20, 2009, 06:32:48 AM »
why the mars moror over the e-trex RT?

3
General Discussion / Re: Lifan Electric
« on: August 19, 2009, 06:39:13 AM »
well that style bike is gone, and while they do have another similar they do not have rolling chasis, they only have complete bikes which would run around 2000 delivered.  If I am going to spend that kind of cash on the donor bike I am going to revert to my original idea of a dirt bike or a trials bike if I can find a inexpensive donor.  The whole project would be less expensive as I would not need as large capacity batteries, since I do not need the bike to go much over 25mph.

4
General Discussion / Re: Thinking of a E-dirt bike conversion
« on: August 18, 2009, 05:13:41 AM »
tell me more about the lithiums, i looked at your site, and it seems most come in a box like form, do I just wire them togeather, or do you make them into a pack for me/?  I ask as i also saw a premade pack, however it waas only 20A and I want at least 40A, preferably 60a.  But it did have a BMS built in.  tell me more please.  If i build a pack, can i use a onboard charger or am I bst not

5
General Discussion / Re: Lifan Electric
« on: August 17, 2009, 07:07:43 AM »
okay, if I go this route, E-tek R or RT,   with the R I can have less battery weight, or use larger batteries, but will the R provide decent acceleration?

6
General Discussion / Re: Lifan Electric
« on: August 17, 2009, 06:54:38 AM »
I am seriously thinking this is the way to go.

7
General Discussion / Re: Thinking of a E-dirt bike conversion
« on: August 17, 2009, 06:39:47 AM »
yes I do know the difference between the lithiums, I was just generalizing.  Another twist, I just saw the post on the Lifan 200 conversion.  Apparently you can get a brand new rolling chasis for 650, that is interesting.  I still think it might be a bit dissapointing speedwise, but I am considering it, again as a cool project, and it would be cool to show up to work on an electric bike, and that one does look pretty cool.....  What is the perfermance difference between the brushed motor they used and the etrex rt brushless.  I know that with the airplane the brushless were much better, less maintance and more power for the same input.

8
General Discussion / Re: Thinking of a E-dirt bike conversion
« on: August 17, 2009, 05:51:51 AM »
As bad as this may sound the idea of a budget is debateable.  This project will be born as a project, I know there will be a learning curve, as it grows I am sure I will end up with lipos, but I will probably start with leak acid.  I am not allocating a real total budget.  I will buy the donar bike first, then the E-tek RT and  controller and throttle, and initial batteries.  By doing it in stages it will not hurt my pocket.  End result is Lipos are in the final budget, just not an initial buy.  As for the frame size, I was thinking the smaller frame initially as it serves well as a trail bike, but as of now I am considering a 125.  What it comes down to is priority of the project is.  If I was to build a streetbike it would be tough to get the performance I would want without major dollars.  Ideally I would like a electric trials bike, but as a first project I will probably not go there as a donor bike will be a large outlay of money, so I fall back on a dirtbike proper.  Is a dirtbike perfect?  Not really as a proper trailbike, as most of my current trailrides are 90 miles and up and last for 4 plus hours with no place to leave extra batteries.  But a dirtbike will still be a fun learning project and fun to use around camp, this is why I was initially thinking 80 size.  After the whole project is done and learning curve complete, I would consider a trials bike as project 2.  I hope this makes sense.  Now for my new question, BMS for Lipos, do I have to make one  or are they available?

9
Home Brew / Re: 21Wheels EL Moto Electric Dirt Bike
« on: August 16, 2009, 10:15:30 PM »
I like this and I will have to buy the El Ninja book, I am just not totally convince on the wisdom of putting the motor hanging on the side of the swingarm

10
Home Brew / Re: 1997 CR125 Conversion
« on: August 16, 2009, 09:55:01 PM »
I am going to start a conversion, possibly similar to yours, is there a web site with more info on your conversion?  What motor and controller did you use?

11
General Discussion / Thinking of a E-dirt bike conversion
« on: August 16, 2009, 09:52:27 PM »
okay, I have never done a E-conversion, that said , I did alot of electric conversions of  RC airplanes so I do have a initial idea of what is needed.  I would like to do a dirt bike conversion.  I want a trail bike that.  I am not concerned about top speed, if I can get it to 25mph I am happy, torque is more important.  I would like to get a battery run time of 1/2 hour with normal trail use.  Where do I start?  Which motor do I choose, other reference materials for info?  Initially I am debating weather to go with a old style 125 prolink style frame or use a yz80/cr80 frame.  The 80 frame would be lighter to start, and the yz80 frame is pleanty large enough toa make a good trailbike even for a full size adult.
Ideas?
Also batteries?  Lead acid or lithium, what is the cost of eqivalent lithiums?
Sorry for the basic questions, but I want to learn it right and get it right, I am not afraid to read old articles, just direct me to them.
Thanks

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