Hi all, I found a Craigslist BMW R50/5 and thought I really need another bike in my life. I bought this bike knowing very little about BMW motorcycles I have worked on alot of motorcycle over the years Honda, Yamaha, Kawasaki, Suzuki,Triumph, A few HD's but this is the first BMW I have ever had my hands on. Met the seller and struck a deal, took the bike to my garage and started looking it over. When the guy started it up for me it was making a pretty loud clacking from the left side cylinder I thought it would either be Piston slap or need a valve adjustment (the seller said he just adjusted the valves) But he also said he cleaned the carbs and they were filthy on the outside and and inside the bike was very difficult to start and didnt want to idle. The bike also had no brakes front or rear, tires were dryrotted fork boots were torn, front forks were dry. I have rebuilt the forks, installed new brakes front and rear as well as new tires and cleaned the carbs which brings me here. Big surprise somone needing help with BMW carbs...... I removed all jets, and soaked all components including the carb housings and float bowls in carb cleaner. As I was breaking the carbs down I noticed that the idle jets were different one carb was a 35 and the other carb was a 45. I ordered another 35 and installed it along with new floats, float needle and pins, new float bowl gasket. I set the floats to be level with the bowl seam. As I was cleaning the carbs I noticed that one carb has a blockoff plug (brass) in one of the ports on the cylinder side and the other has two open ports. One carb is marked as 1/26/114 and the other is 1/26/113. I can upload a pic if needed, so is this the way its supposed to be? With these carbs being so tough to tune and sync I would think they should be the same... I have reinstalled the carbs and still cant get it to idle properly it will idle up high then drops down and will die if I dont hit the throttle. I started out by setting the mixture screw at 2 out and the idle screw at 1/2 turn out. The previous owner had installed a dyna III elec ignition module, I was thinking maybe the advancer isnt working so I will take the front cover off and check it, but it shouldnt prevent idle should it? I have not checked timing but will I guess it could cause issues? Sorry for all the info, just didnt want to waist to much of your time by slow feeding the info. Oh I did do a comp check with carbs off, it was 135 on the right cyl and 140 on the left. I will also check the valves and replace, spark plugs and the throttle cables. If there is anything else I should look into please let me know any and all help is appreciated!