FRONT BEARING : Some of Boca's High Speed, High Heat front
bearings are supplied with one shield. It is not necessary to remove this
shield. The bearing should be installed with the shield facing toward the
front of the engine. Please note that the shield is the metal/silver ring
located on the side of the bearing. For Boca Bearing's rubber sealed
engine bearings however, it is recommended that you leave both seals on.
The bearing is already filled with grease so it does not need the fuel to
lubricate it. This also allows more fuel to get to the rear bearing and to
help stop leakage through the front bearing.
REAR BEARING : Some of Boca's High Speed, High Heat rear bearings
are supplied with one shield. The bearing should be installed with the open
part of the bearing facing toward the front bearing. When maximum
lubrication is required, the single shield may be removed. However, leaving
the one shield in place will still allow the fuel/lubricant to flow through the
bearing. This method offers the added advantage of providing protection
to the chamber area by eliminating the possibility of any foreign matter or
contaminants passing through. Either method is acceptable, it's really a
matter of preference.