battery dimensions yuasa

[darksouls]

my 2005 620 needs a new battery. I looked up on amazon yt12b-bs and they say its 6" x 2.75" x 5.125" the battery i have now yuasa yt12b-bs has slightly smaller dimensions except for the 5.125 tall, which is right on.

So current battery thickness is 2 5/8      yuasa lists 2 3/4
height is 5 1/8                                        height 5 1/8
width 5 3/4                                            width 6"

Just dont want to order the wrong battery.
Thanks guys

[NAKID]

Not sure exactly how much you're looking to spend, but when my battery died, I replaced it with a Shorai LiFePo battery from Monster Parts. Yes, it's more expensive than stock, but it's much lighter...

[EEL]

Hold on there buddy! There are are some caveats with the Shorai that everyone should be aware of:

1) It has less long term storage than the Yuasa. I dont care if you get a LFX18 or the smaller LFX14 style shorai batteries, have less overall storage capacity. Anyone who tells you otherwise is ill informed.

2) It contains 4 cells tied in series to generate a little above 12V. Each battery needs to be charged with a balancer. You can charge it with standard chargers that dont have an automatic "desulfation mode" which can damage the battery. Shorai balanced charger is best and recommended

3) They dont like cold weather. If you dont have a garage and park your bike outside, the thing you need to understand is that lithium performance is based on the ambient temperature. If you park your bike in the cold you literally have to do the opposite of what you would do with a normal battery. In a normal situation, you would turn on the bike and immediately (within a few seconds at least) start her up. The best analogy I can give with a Shorai in cold weather is: you have to get the battery warmed up first. The voltage will build up as the cells get "woken up" from their hibernation.

How do you know if a shorai is good for you? Simple test is whats called a key off draw. Before you replace the battery, get a multimeter in line with the battery's negative terminal (take the negative side off. Touch one side of the multimeter in "current" measuring mode and the other side of the multimeter touches the battery).

The draw shoud be measured in AMPS. An LFX18 battery 18 "Amp Hours" so if your key off draw was 1 AMP measured (it would never be that high just an easy example) then your battery would only last 18 hours before it fully drained.

Do the math and see how long it takes to get to 50% capacity. Shorai's can run down to 20% charge and still work so 50% is a conservative value.

Always important to know what you are buying. That said, I have a Shorai and its been working for 4 years now. Know what you are getting into and you will be fine.

[NAKID]

Hold on there buddy! There are are some caveats with the Shorai that everyone should be aware of:

1) It has less long term storage than the Yuasa. I dont care if you get a LFX18 or the smaller LFX14 style shorai batteries, have less overall storage capacity. Anyone who tells you otherwise is ill informed.

2) It contains 4 cells tied in series to generate a little above 12V. Each battery needs to be charged with a balancer. You can charge it with standard chargers that dont have an automatic "desulfation mode" which can damage the battery. Shorai balanced charger is best and recommended

3) They dont like cold weather. If you dont have a garage and park your bike outside, the thing you need to understand is that lithium performance is based on the ambient temperature. If you park your bike in the cold you literally have to do the opposite of what you would do with a normal battery. In a normal situation, you would turn on the bike and immediately (within a few seconds at least) start her up. The best analogy I can give with a Shorai in cold weather is: you have to get the battery warmed up first. The voltage will build up as the cells get "woken up" from their hibernation.

How do you know if a shorai is good for you? Simple test is whats called a key off draw. Before you replace the battery, get a multimeter in line with the battery's negative terminal (take the negative side off. Touch one side of the multimeter in "current" measuring mode and the other side of the multimeter touches the battery).

The draw shoud be measured in AMPS. An LFX18 battery 18 "Amp Hours" so if your key off draw was 1 AMP measured (it would never be that high just an easy example) then your battery would only last 18 hours before it fully drained.

Do the math and see how long it takes to get to 50% capacity. Shorai's can run down to 20% charge and still work so 50% is a conservative value.

Always important to know what you are buying. That said, I have a Shorai and its been working for 4 years now. Know what you are getting into and you will be fine.

Everyone should do their own research before hand, I was just making a suggestion.

Anyway, I have had the Shorai since Mar 2013 and have had no issues with it. It's never been on a charger and has, at times, sat for more than 6 weeks (neck surgery=no riding) and still started right up. This is with my 2006 S2R1000.

[koko64]

Good batteries, but it's true they need to warm up. They start slow in the cold then get stronger and stronger, while a normal battery gets weaker as you keep cranking. It takes a bit to get used to.

The other thing is true too. They last years just sitting without use or charge if there is no draw on them with alarms, etc. You do have to take that into account. A buddy works offshore and doesn't start his bike for six months at a time and the Shorai never lets him down, but that bike is a carbed SS with no voltage draw while it's sitting and no accessories sucking away on it. I'm interested to see what reports come in from owners of immobilized bikes or bikes with active type accessories before I put one on my Hyper.

It helps to conceptualize of them as "13 volt" batteries to really know where you are with the state of charge. 14.5V is full, 13V is running down and 12V is flat for rule of thumb. They live 1V higher than an AGM battery.

[kopfjäger]

Tender

[EEL]

My old 2005 S2R had almost no key off draw. I'm pretty sure that on a 2005 620 it will be the same. I ran mine down during the winter months for almost 12 weeks without an issue at start.

I transferred the shorai to my new 1100EVO. Its not the best but its loaded with O2 sensors, powercommander and a higher compression motor. The autotune sucks a lot of juice at startup due to the warm up cycle of the 02 sensors.

I've had low voltage resets a couple of times because of this.

Luckily the newer bikes have a battery voltage meter so I can gauge how bad it is.

I would say that newer 2V iterations will not fare as well. I probably only have the summer riding season before the battery takes a dump. Cant complain with a battery that was bought in May of 2011..

[koko64]

Thanks EEL.
I'll stick with the GM battery in the Hyper for now. What do you think the draw of oem O2 sensors is like? Comparable to the PCV type?
The Gixxer track bike and Monster are well served by the Shorai at present.