Now Jim, you know that is not what the Saito instructions say. He should run it for the first 10 minutes at 1/4 to 1/3 throttle and only slightly rich at 4,000 rpm, the first 10 minutes is the most critical. The manual leaves you on your own at that point, I than run a 12 OZ tank through it at 5,000 and another at 6,000, Saito considers it broken in after 40 minutes. If you run it slobbery rich the operating temperature will be so low that the clearances will not wear in properly.