Hope thsy don't mind my posting this but when Vulcan rebuilt my Xflow a while back, these were the running instructions provided.
The Name in performance Engines.
We recommend the following procedures with new Vulcan Engines.
We Recommend Valvoline racing 20/50 Oil in all of our Engines
At 500 miles: Change oil and filter, check tappet
clearances, check head torque
At 1500 miles: Change oil. At this point the engine
should be fully run in
After this period, we recommend the oil is changed every 3000 miles and that general services are every 6000 miles.
Starting the engine and running in:
1) Spin the engine over without the plugs in until some oil pressure is obtained.
2) When the engine has been started do not allow it to idle. Ideally it should be run at 2000 rpm for 20 minutes. after which set the idle between 750 and 1000 rpm.
At This point the Tappets will need to be checked & adjusted as per sheet when cold.
3) When the engine is running, do not allow it to get hot. Remember that a new engine produces a lot more heat than an old one. If the engine is running hot, check your radiator. In some instances it will be necessary to increase the number of radiator cores. We also recommend having a header tank as part of your cooling system.
4) 0 - 500 miles: Max: RPM in gears 4000
top 4500
500 - 1000 miles: Max: RPM in gears 4500
top 5000
1000 - 1500 miles: Max: RPM in gears 5000
top 5500
5) Ensure that the mixture and ignition settings are correct otherwise serious engine failure will result.
6) The engine must not be ‘rolling road tested’ @ full RPM until it has done at least 3000 miles.
7) You can get the Engine Tuned on a rolling road with a Max RPM of 4500 from new but don’t leave the car at the rolling road with out you being there.