Battery for early R1100S

[conkerman]

Hello again. I hope you are all wonderful.

Trying to resurrect my old R1100S. I pulled the tank off and it looks like the previous owner had jammed in a 896 Lawnmower battery. after judicious hammertime of the battery tray. I ordered a similar replacement (Very Very Cheap) but it is frighteningly close to the bottom of the fuel tank.

Bike Starts and runs OK, But I suspect my input shaft Is on its way out. (rattly noise).

What is the correct battery for this bike? Motobatt 51814?

I need to decide whether to save or break it, as it has a set of remus pipes.

Cheers

[nab 301]

If the 896 is doing the job I'd just cover it ( the terminals ) with a piece of old inner tube to insulate it.... Other than that does your bike have Abs ? If so you'll need a 19 or 20A/h battery.
I've used a locally purchased Platinum ctm19lbs AGM battery which I laid on its side after modifying the battery box , (Abs removed)

I think I tried something similar to a 51814 a while back but it didn't turn over the engine very well ... I've since replaced the starter motor so maybe that was the problem?

[conkerman]

Thank you.

I'll line everything up tomorrow. The bike has been sitting for 4 1/2 years so I need to bleed the brakes and do a bunch of other stuff before I take for MOT/ decide whether to part it out.

It's a non ABS model.

[conkerman]

Bought the exide battery in the end. Bike is back together.

Thanks for the input.