81 CB650 Brat/Cafe Build

[dmable44]

Have you come up with a solution for the rear clearance yet? Might be work looking at that first as it could affect the entire seat pan and the are where you are placing the battery.

The Antigravity is a rad little battery BTW. I have the 8 cell on my 850. They make a 4 cell which is tiny, but I don't know if it's big enough for a 650.

I have not checked rear clearance because I still need to get new rear shocks. If that's the case I need to get new rear shocks ASAP.

I was looking at those batteries. I might pick one of them up. Any other brands comparable?

 

[treitz]

Ballistic is another good one.

Get your rear shocks and get a battery. Both might affect your final battery box size and location.


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[dmable44]

Ballistic is another good one.

Get your rear shocks and get a battery. Both might affect your final battery box size and location.


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I'm looking at these batteries now, is there anything special needed to run the newer Lithium style batteries? I'm pretty sure I need an 8 cell but please correct me if I am wrong. Also, is there a good brand of shocks to look for? I don't need anything fancy, I'm working on a budget.

 

[treitz]

I'm the wrong guy to ask about shocks, and I think you already got a ton of good input here on that.

I'm not super familiar with the cb650, but my guess is that an 8 is what you'll need. Revzilla and motorcycle superstore have specs. I'd compare those numbers to a standard replacement. AH and CCA are the numbers you want to look at since they're all 12v.


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[treitz]

This might also cut it. http://www.revzilla.com/motorcycle/shorai-lithium-battery-lfx14a4-bs12?utm_source=product&kwd=&gclid=Cj0KEQiAlae1BRCU2qaz2__t9IIBEiQAKRGDVZlwix6hLhIDiVuYO6cyv8sUKSRlcS9sIsHo3twR890aAh8U8P8HAQ

A little cheaper but might not be quite as small as the other two.


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[dmable44]

I've been looking at the ballistics, shorai and antigravity batteries. Do I have to do anything to the bike's wiring to run a lithium battery?

 

[treitz]

Nope. Just hook it up like any other battery.


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[DohcBikes]

Nope. Just hook it up like any other battery.


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Nope.

You need to be sure your charging system meets the requirements so that you dont end up with an exploded battery.

 

[Maritime]

I've been looking at the ballistics, shorai and antigravity batteries. Do I have to do anything to the bike's wiring to run a lithium battery?

What treitz said but make sure you RR is working or the battery can destroy itself from over voltage/charging.

 

[Maritime]

Nope.

You need to be sure your charging system meets the requirements so that you dont end up with an exploded battery.

You beat me to it.

 

[DohcBikes]

tie goes to the runner

 

[treitz]

Nope.

You need to be sure your charging system meets the requirements so that you dont end up with an exploded battery.

I've never had an issue.

Maybe I'm just lucky...


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[dmable44]

RR? I'm not electrical savvy whatsoever.

 

[DohcBikes]

I've never had an issue.

Maybe I'm just lucky...


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http://www.dotheton.com/forum/index.php?topic=68742.0

 

[DohcBikes]

RR? I'm not electrical savvy whatsoever.

Regulator Rectifier.

If you are running the old one, contact Sonreir at Sparck Moto and get yourself a new one.

Also, you need to examine the health of your stator/alternator

 

[Maritime]

I've never had an issue.

Maybe I'm just lucky...


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All depends on the bike in question, if it has a good regulator/rectifier and charginf system not issues, if it is the wrong kind or not working and the Li battery gets too much voltage too fast they go Boom

 

[DohcBikes]

Not enough voltage is also an issue. And when they blow, it can be very dangerous.

 

[Maritime]

Regulator Rectifier.

If you are running the old one, contact Sonreir at Sparck Moto and get yourself a new one.

Also, you need to examine the health of your stator/alternator

+ 1, Matt will tell you if the 81 650 has the correct style you want. I am not sure what year that Honda put the right style for Li batteries on their bikes. You can test your system with a multimeter. Fire up the bike with the meter on the battery, set to 12 V DC rev the motor up over 4500-5000 rpms and if it reads higher than 14.5-15 volts you will kill the Li battery on your first ride. Lead acid batteries can take higher voltages for longer without blowing up, they will die eventually but are a lot more forgiving

 

[treitz]

Damn. I've never seen that. Obviously over or undercharging is bad.

Can you test the charging system by checking voltage at the battery with the bike running? Like testing alternator.

^^ question answered


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[Maritime]

Not enough voltage is also an issue. And when they blow, it can be very dangerous.

In this case don't they just stop working? I thought it was only with over charging or charging at too high of a rate that cause the explosions and fire hazard, I may be wrong though.