Join Date: 08-25-2010
Location: Bloomington, Indiana
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Carb sync question about a 1976 Honda CB200t
Been a while since I posted here, but I've continued to enjoy the lively conversations going on! I've come up against a carb sync question with my 76 Honda CB200t.
Because I don't have enough experience to do the carb tune/balance/sync by ear and feel, I purchased a Morgan Carbtune tool. I really want to be able to do a carb sync on my own, given how much any shop will charge me, but I'm not sure I'm doing it quite right. This bike has three places of adjustment--the mixture screws, the idle screws, and the carb-top adjusters (I've attached a picture, but I'm sure many of you are already familiar with this bike's set up or one similar to it!). I got the mixture screws set (no issue there). Then with the Morgan Carbtune hooked up, I adjusted the idle screws until both columns in the Carbtune leveled out and the idle was in the range it should be. Then, I rolled gently on the throttle to see if the two columns in the Carbtune were moving together. My thought was that this "test" would tell me if the two slides were moving together. When I started this part of the process, one column was rising, the other was falling when I rolled on the throttle. So, I started to adjust from the carb-top adjusters (a little hex adjuster located at the top of each carb where the throttle cable feeds in). Adjusting these got me to a point where both columns were moving together when rolling on/off throttle. Is that the proper way to do it? My adjustments to the carb-top adjusters didn't feel right, and I wound up with one being turned all the way in and one being out about 2-3 turns...
I haven't been able to find anything that discusses the adjustment of the carb-top adjusters. Typically, manuals and stuff only discuss mixture screws and idle screws...
Thanks a ton!