I had an LA Sleeve 240 in my '84. They recommended jetting that was WAY too rich. I ended up with stock main, with a slightly richer needle jet. Think of it this way - the bike sucks in harder on each intake stroke, so even though the jet size is the same as the 200, it's getting more fuel. I would start out slightly richer than stock just to be on the safe side, but there's no need to make a huge jump, IMO.
The '83-85 are the same except for some minor changes.
After getting it jetted, the '84 240 had killer low end but would not rev out like a stocker. It also got a lot more thirsty.