I have a '98 GSX Limited and it idles closer to 1000rpm. However, I have fouled plugs over time because of, in part, large no wake zones. My solution: I lean on the throttle in the no wake zone to bring my RPMs up to 1300-1500 and "no wake" it a little faster. Still not generating much wake but I am moving faster and turning a few more RPMs. If your ski does not have neutral and reverse, I wouldn't turn the idle up too much, if any.