IRC roadwinners? You must be on a ninja 250 or 300. They are perfectly capable tires and will hook and ride edge to edge just fine. There has to have been another issue, i.e. debris, tire not up to temp at all (like just started bike and road out of neighborhood into a fast corner -40mph kinda tight corner you described?) moisture on road, or rider error -too much speed for corner, poor body positioning, poor braking technique etc, could all be factors. About the only factor that could be related to the tire itself mechanically not functioning as intended would be tire pressure. Those may not be the most confidence inspiring tires, but they are WAY better than the Dunlops (dun-rocks!) that came on the older ninja 250s... those things are like superglue compared to them.
You should check tire pressure then verify riding techniques that may have caused the issue. Masking a technique issue with better tires could work, but could end up with worse issues in the long run and at potentially higher speeds with more confidence at that point. Can you describe the scenario a bit more? Had you just left home, is this a 90* turn out onto a perpendicular roadway, or a sustained curve on the same roadway?
You should check tire pressure then verify riding techniques that may have caused the issue. Masking a technique issue with better tires could work, but could end up with worse issues in the long run and at potentially higher speeds with more confidence at that point. Can you describe the scenario a bit more? Had you just left home, is this a 90* turn out onto a perpendicular roadway, or a sustained curve on the same roadway?