minimum battery amp hours

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purplellama
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Real Name: josh
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My Motorcycle: yamaha xs650

minimum battery amp hours

#1 Unread post by purplellama » Wed Jun 03, 2015 10:45 am

i have a 1982 yamaha xs650, heavily modded, kickstart only. it came with a tiny battery the size of a deck of cards. you turn the bike on to start it, and this battery has just enough juice power it up to start. in theory. in reality i think it's not quite enough. i've always had difficulty kicking it over, but if i jump it, it starts right up.

i don't have space with the current configuration for a typical battery, which is why the previous owner used this one, which fits in a hollow under the seat. the battery is rated at 12 volts/0.8 amp hours.

two questions.

1 - i'm wondering if anyone knows of similar small battery that would work in this application.
2 - can anyone recommend a minimum amp hour rating? would a higher rating solve my starting problem.

any help would be hugely appreciated.

thanks.

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Johnj
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Re: minimum battery amp hours

#2 Unread post by Johnj » Wed Jun 03, 2015 1:21 pm

Yes a bigger battery would help.

1.No I don't even know if anyone makes one. I'd check manufacturers online. But in that size your not going to gain much in amp-hours.
2.A stock 82 XS650 uses a much larger (134mm*89mm*166mm) battery.

BTW welcome to the forum. Lets see a picture of your bike.
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purplellama
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Posts: 3
Joined: Wed Jun 03, 2015 10:43 am
Real Name: josh
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Years Riding: 15
My Motorcycle: yamaha xs650

Re: minimum battery amp hours

#3 Unread post by purplellama » Wed Jun 03, 2015 1:56 pm

thanks. here's a pic
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