Enya 41-4c fs, running in help
Saito recommends 4000rpm for the first ten minutes at a very rich setting on the needle. Gradually lean it to a less rich setting for a 40 minute break-in. After break-in, peak out the rpm's then richen the mixture for a 200-300 rpm drop. O.S. is much the same on time, but recommends starting with 10 seconds of very rich alternating with 5 seconds of almost max. rps. for the first tank. For three more tanks, gradually give it more time at the leaner setting. O.S. is done at full throttle for all the tanks. Both brands say to wait until break-in to try to adjust the low speed needle. My Enya book is also very poor on break-in info.