That...I disagree with ya jeeves...because its rotating mass...and any sort of rotating mass I'd love to get rid of especially if your building a motor from the ground up or doing a double roller install the right way...in the DSM world they came to to figure that for every pound removed from the rotating assembly you can gain, on average, 2.7 crank HP. And you were the one who wondered why my motor revved so fast...plus...mine is balanced...that might help too.
This. When it comes to anything internal I'd rather do it right the first time then half ass it.