Whats the difference between the fc and fd rotor bearings. On mazdatrix website it shows the fds as (.005--.010), i would assume the fd have more clearance than the fc? Is it worth it to use the fd rotor bearings on my s5 TII rotor? I will be running fd front and rear stationary gears also. Will

FD runs deeper groove.





-Ted

I swore i measured both bearings including the groove, and i thought they were the same, maybe i'll run the fd bearings, since they are only $10 more.

the fd bearings come sized too

I thought only the fd stationary gear bearings came in different sizes.

i think the rotor bearings do too

Yep. Both FD rotor and stationary gear bearings come in different sizes. Problem is trying to find the size when the color marker has worn off https://www.nopistons.com/forums/pub...O_DIR#>/11.gif

I just looked at my mazdacomp catalog and they do list three part numbers for the fd bearings. I would assume the three bearings are between (.005--.010). I wonder why mazdatrix only list one part number for the fd rotor bearing and stat gear bearing. Maybe they only sell the rotor bearing that has the most clearance.