different size pistons

[ridgerider]

not my everyday rider,   1968 shovelhead,  the rear cylinder cracked and in desperation i put a stock bore 74" cylinder on, the front is 0.20 over, i don't git this one out much,,, is it worth the time,cost,effort to take it apart to match the 2 bores? i do not notice any difference or vibration.

[Hybredhog]

   Don't lose any sleep over it, the piston weight difference is negilable, and old H-D manuals say that a .020 difference is OK. If you take a compression reading, odds are their close if the front is "middle aged"...Jeff

[shov60]

  Had an old pan once after alot of use and good service I discovered rear cly. was 70 over and the front was 30 over and it ran great for several years
               

[ridgerider]

thanks for the peace of mind, put the new cylinder on at sturgis, working on a picnic table, just worrying the winter away...been a great bike..

[Tow-Truck]

Harleys don't need the same pistons as they run on the same crank pin, so effectively the engine only 'sees' one piston.