well since we are on the subject of ceramic motor bearings here, i can assure you the ones from boca are no where near as good as the orignal ones used from novarossi or rb.
the ball size from boca are extremely small compared to the novarossi ones and i have had them personally crack on me and destroy a brand new piston and sleeve set rody had just installed in one of my 1005-rc motors.
DO NOT USE BOCA CERAMIC MOTOR BEARINGS, i have never in 2 years of having dealt with them gottenthem to admit that the bearings are junk. go ahead and use them in a 650.00 motor if you want, but dont try and cry or complain when one of the balls cracks under load
for whatever reason, novarossi based ballbearings are very tough compared to the ceramics
just my 2 cents
