Posted June 04, 2009 - 03:06 AM
Posted June 04, 2009 - 08:36 AM
I've had my 08 wr450 for a year now my bike and my battery seems to be dead,it will kick start but no e-start any suggestions. thanks
Do you have a multimeter. If so charge the battery and make a note of the beginning voltage and the time it takes to charge. If the voltage is low and the battery doesn't take very long to charge it is probably bad (Battery Ah divided by charging A give a good approximate of how long a fully discharge battery should take to charge). Then once it is charged hit the button and watch the voltage. If the voltage drops really low (below 10V) the battery is probably bad.
Once the bike is started you can test that the charge circuit is working by reving the bike and making sure the voltage of the battery rises and falls with the revs.
I'm going to say the either battery is probably bad, a connection is loose or a fuse is blown.
Posted June 04, 2009 - 12:21 PM
could I put two 2.5s in parralle? lets say, I buy a 2.5ah and later decide that it doesn't have enough power for me. can I just order a second 2.5 and strap them together??
Note: I guess they would have to be ballanced first, maybe with a resistor, or just get them charged to a similar voltage..
Posted June 04, 2009 - 01:30 PM
could I put two 2.5s in parallel? lets say, I buy a 2.5ah and later decide that it doesn't have enough power for me. can I just order a second 2.5 and strap them together??
Note: I guess they would have to be balanced first, maybe with a resistor, or just get them charged to a similar voltage..
Yes you can do this...that is basically what he is doing to make his 5 amp battery. And no need to balance them.
Posted June 04, 2009 - 02:27 PM
Posted June 04, 2009 - 07:57 PM
I just ordered the 5ah for my wr450. The napa battery i put in last year is dead and it had been on a trickle all winter. The local honda shop (my only choice close to me) wants $120 for a Yuasa and even on line there over $80. If i can get 4 yrs out of this battery than I'm money ahead and having some experience with these type of batteries i think it will be money well spent.
Posted June 05, 2009 - 08:39 AM
Posted June 05, 2009 - 08:45 AM
bezeer-yours left last night.
Demo_Slug-You can put 2 2.5Ah in parallel, it is not as elegant of a solution as just using a 5Ah. The two inside cells in on 2.5Ah (the non post cells) are not actually electrically connected to two inside cells of the other 2.5Ah. It shouldn't be much of an issue though, as you are asking the cells to work half as hard as they do in a 2.5Ah.
You are right that when you connect the two 2.5Ah batteries you want them at close to the same voltage. If one is at full charge and the other is empty the full one will dump a lot of current in to the empty one. Putting the batteries individually on a trickle charger overnight and then connecting would be a good solution.
Posted June 05, 2009 - 11:43 AM
The two inside cells in on 2.5Ah (the non post cells) are not actually electrically connected to two inside cells of the other 2.5Ah.
yeah, I don't follow that at all.
Posted June 05, 2009 - 01:27 PM
Posted June 05, 2009 - 02:13 PM
[COLOR="Magenta"]when are these going to get encased?[/COLOR]
Why do they need to be encased?
Posted June 06, 2009 - 12:01 AM
really, do you think the big battery guys wouldn't be in this if there was a big fat profit margin. A molded case is the sort thing that only makes sense if you are going to make 1K of something. you ( not you but, "we" ) are getting new tech at DIY price.
Posted June 06, 2009 - 09:46 AM
we are getting new tech at DIY price
Not really, the TurnTech 2.5amp battery is about 10 bucks to much when compared to another company that will build the same battery using the same cells.
If you want to truly do it your self, you can buy and build the battery for about 45 bucks.
I placed an order on friday for everything I need (45 bucks). Once I get everything, I will do a write up with addition to some links
Posted June 06, 2009 - 11:00 AM
Posted June 06, 2009 - 12:01 PM
Why do they need to be encased?
Why plastic cases, basically for 3 reasons. 1 it is expected/looks good. 2. Seals the battery. 3. Makes the connection with the bike more stable.
Plastics cases should be available mid next week. They are suppose to arrive on Monday.
Posted June 06, 2009 - 04:09 PM
My only concern is the battery shorting out on the frame.
I could care less about looks.
The way I have it figured is that I'll just tie rap the things in.
Pictures on the website of installations would be neato.
Posted June 06, 2009 - 05:34 PM
Both the one you will receive and the ones in plastics have the same connectors. Don't thick that there is much of a chance of either shorting out on the frame, of course every bikes battery box is slightly different so your make or model may vary.
Posted June 07, 2009 - 06:43 AM
Posted June 07, 2009 - 12:34 PM
Posted June 07, 2009 - 01:02 PM