Combines gleaner settings

Is it possible to put a smaller sprocket on the clean grain auger_elevator drive on a '92 R52 to speed up removal of grain. We seem to be limited on capacity by this area. When we get into higher yielding corn the shoe will overflow into the fan area. No loss over the rotor or shoe unless it overloads. The clean grain auger is in good condition. Has anyone had any success switching sprocketsIJ If so, what is the part n. Any suggestions would be appreciated.

I am currently reworking an F2 for corn only. would I get the best results from using the regular concave bars or should I go with the maize bar. I would also appreciate any other comments to help make this machine as effecient as possible in corn. Thanks, mark

just got a r-75 , what is the best cly speed and settings for sep and trashing grate , I have them set at 8 and .5 and running 3oo rpm , standard rotor