M MSpeedPro#793 Member : 2003.5 MazdaSpeed Protege Titanium Grey #793 RIP 02 Protege 5 Aug 11, 2013 #1 i was told by a machine shop that when my motor is put together i should not use this Underdrive pulley because it is possible to throw the crank out of balance and maybe i should put a stock harmonic balancer on.. Thoughts?
i was told by a machine shop that when my motor is put together i should not use this Underdrive pulley because it is possible to throw the crank out of balance and maybe i should put a stock harmonic balancer on.. Thoughts?
H hornsfan10609 Certified Mazda Tech : 2003.5 Mazdaspeed Protege x2 Aug 11, 2013 #2 They probably speak from experience. It's up to you