now only showing 11v, wont take a charge,
need to get a new one, any recommendations for the t160.
After my last original Lucas
finally expired in the mid-1980's, I used the same Varta batteries
that Les Williams fitted in his Rita-ignited Legends (as you might know, anything mechanical/electrical Les changed on those bikes was for reliability); they were 11Ah (Amp-hours) and the last ccA (cold-cranking Amps, for electric-starting) I found on the Varta website was 90 ccA.
Closest modern 'maintenance-free' battery
to the Varta in both Amp-hours and physical size is the Motobatt MB9U
; however, that produces up to 140 ccA. If you'd like even more ccA while still not filling the space allowed for the original Lucas battery
, Motobatt MBTX12U
can produce up to 200 ccA.
Both of those will allow you to fit the battery
with the +ve terminals closest to the sidepanel and drive-side frame seat tube while attaching the cables at either the front or the rear; attaching at the rear (ideally having a ~3" longer battery
-negative-to-starter-solenoid cable) allows much easier refitting of the sidepanel.
If the Motobatt
Vile Yellow colour offends, Yuasa YTX14-BS
is a similar physical size to the MBTX12U, if slightly lower Ah and ccA (though still higher than the aforementioned Varta). It only has two terminals and, if fitted with the +ve terminal beside the sidepanel and under the frame tube, the terminals will be towards the rear of the carrier.
I've never known any electrical unreliability with a MB9U until it gets very old (10+ years old); given the MBTX12U and the Yuasa produce more Ah and ccA, can't see why they'd be any less reliable. Given standard engine cc. and compression, never known any need for a battery
a similar physical size to the original Lucas