Spec II has found that
upon installing chambers, it is helpful to drop a tooth on the front
sprocket to take full advantage of the power increase. RZ350's and
RD400's drop to a 16-tooth sprocket, whereas RD350's will now use
a 14-toother. In any case, we have front sprockets in 14-, 15-,
16- and 17-teeth configurations available.
# 354FS - RD/RZ Front Sprocket (Specify Size)