how big off cc's you can get on a blaster all i know about is a 240cc kit and also will a blaster motor fit in a 250ex

 

Trinity has a 240, 260, and a 285, but if you are going to get a big bore kit a 240 would be your best bet. If you get any bigger than a 240 you will have problums with over heating and it will greatly reduce the reliability of your engine.

 

on a stock cylinder the maximum possible displacement (without a big bore sleeve) is 207cc's at .080 over stock bore. Adding cc's, however will not add power, by boring it and getting a barely larger piston you will notice no power gains at all. trinity sells a 285cc kit, these are only for drag use though.. they would be way to unreliable for everyday trail/recreational use.