My BAD!! Chuck is correct on the 92 vs 94 mm. To answer Bruce's question, the 2 mm difference would be .1 liter I suppose. :-) Thanks for the correction Chuck, "Minor correction: 92 mm gives 3.0 L while 94 mm cyl give 3.1 L. Assuming of course, the crank shaft stroke remains late model stock of 2.94." Chuck S