Quote:
Originally Posted by Brushwarrior
book just gives general advice on running in etc.
is not over 50 mph acceptable? just want to be kind to the ol gel.
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Running-in an engine properly makes all the difference, you can rev it high, but never with full throttle or for prolonged periods, also never lug them up hills, get into a lower gear and keep revs up using low throttle.
The ideal running in regime - You need the revs to free things up and make sure there are no high spots but not loading the engine by giving it too much throttle.
It was always suggested to me that the actual revs are not a problem within reason as long as the load on the engine is not high , so running along on half throttle down hill at near max speed is better than lugging up a hill in top "keeping the revs down" !
Heat build up is the enemy when running in. If you do a long run while running-in, stop once in a while to let things cool down.
There's a school of thought that recommends full throttle occasionally for short bursts during the initial period of running-in. This is to ensure that combustion gasses get well behind the piston rings and force them onto the cylinder. This removes the last of the machining roughness and beds the cylinder and ring in properly.
Failure to do this means that the cylinder walls will glaze over and cylinder pressures and therefore compression will be lost in the future. No real damage, but lower performance.
You can read about the "thrash it from the beginning" philosophy here:
http://www.mototuneusa.com/break_in_secrets.htm
Don't know much about Bonnevilles, but if my 1050 Tiger was returning 34mpg, It would be going straight back to the dealers to be checked out. I cannot believe that 34mpg is normal, on a mildly tuned, 865cc, 4 stroke twin, even with a new, tight motor.
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