minimum battery amp hours

Posts: 3
Joined: Wed Jun 03, 2015 4:43 am
Real Name: josh
Sex: Male
Years Riding: 15
My Motorcycle: yamaha xs650

minimum battery amp hours

#1 Unread post by purplellama »

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.


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Posts: 550
Joined: Tue Sep 02, 2008 1:04 pm
Real Name: Pete
Sex: Male
Years Riding: 10
My Motorcycle: 1980 Suzuki GS550L, 2019 Zero DSR
Location: Athens, NY

Re: minimum battery amp hours

#2 Unread post by pchast »

Perhaps a lithium battery. Verrry small.
2019 Zero DSR, 1980 Suzuki GS550L

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Legendary 300
Posts: 300
Joined: Thu Jun 27, 2013 2:10 pm
Real Name: Ron
Sex: Male
Years Riding: 34
My Motorcycle: 1988 BMW R100GS
Location: Ft. Collins, CO.

Re: minimum battery amp hours

#3 Unread post by GS_in_CO »

1000 word explanation is in his other identical thread here-

Current: 1988 BMW R100GS (the 'numberplate' model)

Past: 1987 Yamaha XT350
1983 Honda CB900F
1980 Honda XL185S
1979 Suzuki GS425E

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