Lithium batteries- what is your experience? - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 27 (permalink) Old 06-05-2017, 07:39 AM Thread Starter
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Lithium batteries- what is your experience?

The SP2 I brought home about a month ago has turned into a real basket case. The previous owner clearly hid issues from me. I have worked through most of them to get to this point... IE completley rebuilding the frontend, including new lower legs from Honda, that just the beginning.

So now I am trouble shooting the harness. Specifically the FI light fiasco. Yes- I have the service manual. I have found the relay that was intermittent- no surprise- it was the fuel pump relay. PO had the relay stuffed behind the side of the taillight and I couldnt see it.

OK- so fast forward to Thursday night. I pull the bike out to take it for a ride to get dinner. I dont trust the bike at all- considering the last trip I took it stranded me. Bike is hard to start.. IE turning over slow. Then I lose the fuel pump priming. I go back to checking relays, all are good. So I suspect the the battery is low. I probably tried for about 5 minutes or so to get it to fire.

I put my meter on, and I am reading 11.9V. When I brought the bike home the week before (when it stranded me), i put my meter on it and it read 13.2V.
It sat off the tender for the week in between.

Bike has a lithium battery, with what I assume to be the correct tender, and a DHC relocator kit.


Anyone out there running a lithium battery? Do you guys have hard start/no start issues? Other electrical gremlins?
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post #2 of 27 (permalink) Old 06-05-2017, 07:52 AM
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There's a wealth of RC51 info on the Rogue site; here's a little something on lithium batteries:

ROGUE battery mods page
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post #3 of 27 (permalink) Old 06-05-2017, 08:10 AM Thread Starter
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Thanks. I knew I had read that before... and just didnt remember it.
Looks like im putting an OEM back in it.
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post #4 of 27 (permalink) Old 06-05-2017, 08:21 AM
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Remember, just because ANY battery tests at an "acceptable" voltage level doesn't mean squat if the battery itself is "flat." It simply won't have enough juice to crank over...

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post #5 of 27 (permalink) Old 06-05-2017, 08:36 AM Thread Starter
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So I did not load test the battery. That is true. Its a bit of a pain to get to with it being relocated.

I guess my question was more along the lines of what are the do's and dont's of having a Li-ion battery?

Like only try to start it for 3 seconds... or run the highbeams before trying to crank (what PO told me)... or do a rain dance before cranking and hope the gods look down upon you with approval...
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post #6 of 27 (permalink) Old 06-05-2017, 09:17 AM
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A lithium battery with no problems should not require any kind of special moves to get it to start the bike.

Now, charging that lithium battery, that's another story. Your can ruin them by jump starting off another vehicle or by charging with a battery charger not made for the lithium battery. Alien Motion told me they can't handle the "in-rush" when jumped from another vehicle.

I won't buy another lithium, unless someday I own a vehicle that was designed for it. Not worth it to me to pay a bunch more money to save a few pounds and gain a lot of quirks and limitations and caveats at best, problems at worst.

Anyway, sounds like your bike has electrical gremlins. Rarely any fun.
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post #7 of 27 (permalink) Old 06-05-2017, 09:54 AM
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The RC51 is finicky with Lithium and needs quality components.

Check out Speedcell batteries, our RC51 specific data and experience designing/racing RC51's for years ensure that our products work best.

We power basically the entire MotoAmerica paddock.

I always take care of RC51 owners personally since I am an enthusiast as well.
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post #8 of 27 (permalink) Old 06-05-2017, 11:05 AM Thread Starter
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^ do you run one in your bike?
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post #9 of 27 (permalink) Old 06-05-2017, 12:12 PM
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Quote:
Originally Posted by gunther19820 View Post
^ do you run one in your bike?
hell yes


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post #10 of 27 (permalink) Old 06-05-2017, 12:28 PM
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I have been running a Speedcell battery in mine for probably the last 10 years with no issues at all. It finally needed to be replaced a few months ago so I replaced it with the latest Speedcell.
I'm a firm believer in you get what you pay for. Sure there are cheaper one out there now and some restrictions on jump starting or charging Lithium batteries but I'm willing to accept that for the weight savings alone.

Last edited by BTopp; 06-05-2017 at 12:31 PM.
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