1998 Kawasaki 750SXi Pro Service Manual Supplement, Page 17Get this manual
GENERAL INFORMATION 1-11
(VI) Precautions 1) No need of topping- up No topping-up is necessary in this battery until it ends its life under normal useForcibly prying off the sealing plug to add water is very dangerousNever do that2) Refreshing charge If an engine will not start, it indicates the battery has been dischargedGive refresh charge for to 10 hours with charge current shown in the specification (see the Electrical System chapter)When fast charge is inevitably required, do it following precisely the maximum charge current and time conditions indicated on the batteryCAUTION
This battery is designed to sustain no unusual deterioration if refresh-charged according to the method specified aboveHoweverthe battery's performance may be reduced noticeably if charged under conditions other than given aboveNever remove the sealing plug during refresh chargeIf by chance an excessive amount of gas is generated due to overcharging, the safety valve operates to keep the battery safe3) When you do not use the watercraft for months Give refresh charge before you store the watercraft and store it with the negative lead removedGive refresh charge every six months during storageBattery life If the battery will not start the engine even after several refresh charges, the battery has exceeded its useful lifeReplace it(Provided, however, the vehicle's starting system has no problem