I am looking to upgrade my stock 400ex motor. I was wondering what other people have done and what they think is good. I was thinking of going with either a 416, 440 bore and stroke, or a 440 bore only. I heard that the 416 rev really quick, but the 440 bore has lots of low-end pull. Haven't really heard how the 440 bore and stroke performs. Money really isnt a problem to an extent. Also, who would be a good company to look into for the work. I was thinking of going with LRD or CT, but I am still open to others. Any help would be great. I'm not looking to get the work done until end of the year though, so I have time to decide.