Thanks to forum members for helping me sort this...
Yuasa makes a direct fit upgrade for the stock LIKE 200i battery.
The top is our stock battery (YTX9-BS)Seen here, the other battery would be a direct fit - it is the same demensions as the stock battery.
Note the increase in power specifications for the upgrade battery but
you will need to charge these batteries.
Here are 2 other YUASA batteries with much improved specifications - except with both batteries will need you to find 5mm more under the battery cover. They are 110mm tall, rather than our srock battery which is 105mm tall. There are 2 posts molded on the underside of the battery cover which hold down the battery when the cover is screwed down. It certainly looks like there is enough post there to trim 5mm off of these 2 posts, so that the 110mm tall new battery will fit under the cover. 3/16ths of an inch will need to be found under there.
All 3 batteries seem to be readily available from various sources....
Stig