Hey guys, I'm new to this forum and was needing some help.  First of all let me say that if I break a rule or this topic exists somewhere else I'm truly sorry.  Secondly, I've read this forum many times and have gotten plenty of good advice from it and I just wanted to thank everyone that shares and posts info.  Ok, I bought this used reel today and would like to know which Revo sx it is.  It has 11 bearings and a 6.4:1 ratio.   I've looked all day and I can't find it anywhere.  If I were to have to fix or upgrade it knowing which model it is would be very important.  If anyone can help, thank you so much

There's a number stamped on the reel foot to help ID thecright schematic. Gen 1 &2 weren't that different from one another if I remember 

Thank you Delaware valley tackle.  Yes I was wondering about the number.  It's 16 00 16/37.  I guess that schematic goes with 4 or 5 different reels cause when I look up schematics 16 00 goes with a few different reels.  I really appreciate the info.  I've been fishing a long time but I haven't had a baitcaster since the 90's when we had some Shimano reels and a quantum cranking reel.   In your opinion what upgrades would potentially be good for this reel? 

Pull the spool and see if it's a full shaft or floating design. Full shaft will benefit from super tuning, beyond that a deep cleaning / bearing flush and carbontex drag should suffice. 

Delaware Valley Tackle again thank you so much! Yeah I was going to get it cleaned and serviced for sure.  I'll most definitely do the drag and super tune if I can.  I paid 30 dollars for the reel so if I have to put a little in it it to make it better I'll gladly do that