Harley Davidson Engine Break In Procedure

Engine Break In Myth.

Harley davidson engine break in procedure. 1- Initial start up. By 10000 miles it is burning a quart of oil every 1000 miles. This will be your last break-in run.

Installation andor break-in procedures may result in damage to pistons and or other engine components not covered under warranty. Let the engine cool till you can touch the engine. Repeat 12 times and watch oil temp and unusual noise.

Its important to break in a new motorcycle engine correctly or you risk impairing its performance or damaging it outright. Prior to that method I babied one engine during break in and it showed as piston blow by and moderate performance. Engine break in comparison.

Heres how to do it right. After warming up the engine he puts it in fourth gear and does five half-throttle dyno runs varying between 30 60 of the engines maximum revs allowing the engine to decelerate fully without using the bikes or dynos brakes. The first 50 miles are the most critical for new rings and piston break-in most engine damage will initially occur during this period.

Follow the above procedure and run for 15 minutes. No need to follow the lengthy break-in procedure. Follow the same procedure as above but this time running for 10 minutes.

Keep the heat down by not exceeding 3000 rpm and vary the speed. Now is the time to let the engine totally cool down again. If you hear this someone is telling you the airfuel mixture and ignition timing is not important when the motor is new.