OK, a 'cut and paste'
"For a piston engine, a good running in regime would be to start off with very light throttle, low revs, and light engine loads - and progressively build up both revs and loads (but still avoiding WOT) - and end aiming for full throttle, max revs, and max engine loading at about 1,200-1,500 miles. It is absolutely vital not to maintain a "constant" rev loading, say for the first 600 miles, and then to cane the pants off it suddenly. You need to vary the engine revs, up-to, say 3,500rpm (not consantly at 3,500rpm) for the first 300 miles, then upto 4,500rpm for another 300 miles, and so-on."
0 - 300 miles up to 2,500 rpm / 1/4 throttle
300 - 600 miles up to 3,500 rpm / 1/2 throttle
600 - 800 miles up to 4,500 rpm / 1/2 throttle
800 - 1,000 miles up to 5,500 rpm / 3/4 throttle
1,000 - 1,200 miles up to 6,500 rpm / 3/4 throttle
1,200 - onwards max rpm / full throttle
The most crucial thing when running in, is to vary the engine speeds within those thresholds, so for example, between 600 and 800 miles, don't religiously stick at 4,500 rpm for the whole 200 miles - vary it up to 4,500 rpm."
