Cafe Racer Forum banner

1 - 20 of 21 Posts

·
Registered
Joined
·
7 Posts
Discussion Starter #1
Hey guys, I'm not a motorcycle or technical guy but I have a client who hs a 1990 BMW and I need to put a trickle charger on it while it is winter but for the life of me I can't access the battery area and the owner (not living here) doesn't remember how. I can't find a seat release to pop up or anything. any help would be appreciated
 

·
Registered
Joined
·
5,527 Posts
If it's a K model you just remove the side cover and clip the alligator clip on the terminal, the ground can go to anywhere that is a ground. If it is an R somebody else will need to chime in.

... if the bike is using a cheap lawn tractor battery instead of the original one, the positive will be on the right hand side, the original + was on the left.
Seat release is keyed, look for the lock on the left side of the bike and push, if it don't push it's locked.



oh wait, you say it has been turned into some kind of cafe racer thing? lord only knows where they put it,
it might even be a lithium battery that can bust into flames if you leave it on the charger.
;) just take it for a ride every once in a while to charge it up, that's what I would do
 

·
Registered
Joined
·
7 Posts
Discussion Starter #3
Thank you. Battery is already too weak to turn on. Also how would I know if it is a lithium battery?

If it's a K model you just remove the side cover and clip the alligator clip on the terminal, the ground can go to anywhere that is a ground. If it is an R somebody else will need to chime in.

... if the bike is using a cheap lawn tractor battery instead of the original one, the positive will be on the right hand side, the original + was on the left.
Seat release is keyed, look for the lock on the left side of the bike and push, if it don't push it's locked.



oh wait, you say it has been turned into some kind of cafe racer thing? lord only knows where they put it,
it might even be a lithium battery that can bust into flames if you leave it on the charger.
<img src="http://www.caferacer.net/forum/images/smilies/wink.png" border="0" alt="" title="Wink" class="inlineimg" /> just take it for a ride every once in a while to charge it up, that's what I would do
 

·
Registered
Joined
·
5,527 Posts
can you post pictures? it might be obvious to lots of guys here, :cool: nobody in here except a bunch of freakin motorcycle gear heads

does it look like a car engine with all the cylinders down one side

or does it have one on each side placed kind cockeyed
 

·
Registered
Joined
·
7 Posts
Discussion Starter #5
good idea, thanks. i'll be there tomorrow and will snap a few pix. owner swore there was a button towards the back that released the seat, but i looked and unless i'm somehow just glossing over it, i just didn't see it
 

·
Registered
Joined
·
23,287 Posts
if the bike is an airhead (twin cylinder, horizontally opposed engine), there is a seat release button on the left side right by the key lock for the seat (below the seat but above the seat cover, next to the grab handle). If the seat is locked, the button won't work. the ignition key should unlock it.
 

·
Registered
Joined
·
5,527 Posts
if the bike is an airhead (twin cylinder, horizontally opposed engine), there is a seat release button on the left side right by the key lock for the seat (below the seat but above the seat cover, next to the grab handle). If the seat is locked, the button won't work. the ignition key should unlock it.
Is that the easiest way to access the battery Geeto?
 

·
Registered
Joined
·
1,859 Posts
I might well be wrong, the first pic seems to show that you already have an optimate charger lead fitted.
The bike is a bit older than 1990, early/mid 80's would me my guess.
 

Attachments

·
Registered
Joined
·
7 Posts
Discussion Starter #10
I might well be wrong, the first pic seems to show that you already have an optimate charger lead fitted.
The bike is a bit older than 1990, early/mid 80's would me my guess.
thanks, what do i do with that? also the delivery paperwork said 1990 but owner said 1980 and i don't know anything about these. any specific help as to what to get to keep it charged AND how to connect would be much appreciated
 

·
Registered
Joined
·
5,527 Posts
The seat has been replaced, possibly doesn't even hinge or open, the battery tender plug is standard, you can get a battery tender to put on it directly.
The plug that has been added is just like the plug on the battery charger. Battery is a lead acid type, which is good for your purpose. should be super easy, under seat access won't do anything for you anyway.

One of my battery tender/chargers is sold by Honda, but it's not your only alternative.

.... hopefully there are no mice where you store it.
 

·
Registered
Joined
·
23,287 Posts
View attachment 99439

here are the pix. does this help anyone determine where it might be?
In this pic, see that wire that looks like lamp cord that goes down by the foot peg? If you follow it towards the floor I betcha it leads you to a battery tender plug in. I think most of the plugs are of a universal type these days.

Bike is def not a 1990, its a 1977-1984 r-series airhead.

The seat on it I believe a boxer cafe seat. That means there should be a release on the back under the taillight and then the whole seat slides back and comes off. There is a tab at the front of the seat that slides into the backbone of the frame. You can see in one of the pics where the stock lock and button have been removed. Yo can see how that seat is mounted here: Cafe Tails but don't be surprised if it is bolted down.

To answer Trials question, if the bike were stock I do think under the seat is the easiest way to access the battery, because the seat pivots, you remove the under tray, and then you have a lot of room underneath to attach alligator clips if you need to charge and don't have a plug to fit the charger plug that is installed. You can also access the battery by removing the side covers, but room is tight if you need to get your hands in there. IIRC the side covers are screwed on.
 

·
Registered
Joined
·
5,527 Posts
If he needs to remove it. Sure! but I was under the impression he was just storing it
and the owner requested the battery be taken care of.
 

·
Registered
Joined
·
1,859 Posts
In this pic, see that wire that looks like lamp cord that goes down by the foot peg? If you follow it towards the floor I betcha it leads you to a battery tender plug in. I think most of the plugs are of a universal type these days.

Bike is def not a 1990, its a 1977-1984 r-series airhead.

The seat on it I believe a boxer cafe seat. That means there should be a release on the back under the taillight and then the whole seat slides back and comes off. There is a tab at the front of the seat that slides into the backbone of the frame. You can see in one of the pics where the stock lock and button have been removed. Yo can see how that seat is mounted here: Cafe Tails but don't be surprised if it is bolted down.

To answer Trials question, if the bike were stock I do think under the seat is the easiest way to access the battery, because the seat pivots, you remove the under tray, and then you have a lot of room underneath to attach alligator clips if you need to charge and don't have a plug to fit the charger plug that is installed. You can also access the battery by removing the side covers, but room is tight if you need to get your hands in there. IIRC the side covers are screwed on.
The side panels are held on with a rubber band Geeto.
 

·
Registered
Joined
·
23,287 Posts
The side panels are held on with a rubber band Geeto.
Thanks, on my monolever they are are held on by a screw at the bottom and I wasn't sure how far that design went back, it's been a while since I played with an earlier bike.
 

·
Registered
Joined
·
7 Posts
Discussion Starter #16
damn you guys know a lot. someone mentioned a cord going down to the foot peg. i went and checked it out and there is this connector. is there a trickle charger that has this connection? would i just use a normal charger? the one i got that worked easily on his other two cars doesn't have a connector that looks like this. thanks!!!!! IMG_7472.JPG
 

·
Registered
Joined
·
1,530 Posts
That’s a standard SAE connector. Several trickle charger models will have that connector, or you can wire one onto a charger by cutting and splicing it in.

If wired correctly to the bike, the exposed terminal should be negative.
 

·
Registered
Joined
·
23,287 Posts
damn you guys know a lot. someone mentioned a cord going down to the foot peg. i went and checked it out and there is this connector. is there a trickle charger that has this connection? would i just use a normal charger? the one i got that worked easily on his other two cars doesn't have a connector that looks like this. thanks!!!!! View attachment 99477
90% of battery chargers sold today will have this connector, either as a separate attachment, or inline from the charger itself as the way in which you change attachment leads. Seriously, I bought a cheap trickle charger from autozone last year and it had one, as does my genius charger and my 2 battery tender brand chargers. You have to have a very old charger for yours not to have it, check in the box your charger came with and see if you don't have one. Worst case here is a $20 charger from walmart that has it:

https://www.walmart.com/ip/12V-6V-1-5-A-Smart-Battery-Trickle-Charger-Maintainer-Prevents-Overcharge-Perfect-for-Boat-RV-Car-Truck-Motorcycle-ATV-or-Mower-Batteries/324061411?wmlspartner=wlpa&selectedSellerId=3310&adid=22222222227165032124&wl0=&wl1=g&wl2=c&wl3=279308678582&wl4=pla-467952162716&wl5=9014879&wl6=&wl7=&wl8=&wl9=pla&wl10=113506454&wl11=online&wl12=324061411&veh=sem&gclid=EAIaIQobChMIt_2atsLG5QIVEvDACh0s7QDVEAQYAiABEgLy0PD_BwE
 
1 - 20 of 21 Posts
Top