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Author Topic: CB650 carb synch screws  (Read 2469 times)

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Offline Scott S

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CB650 carb synch screws
« on: August 14, 2013, 05:41:20 am »
 Anyone have any secrets as to how I'm supposed to access the carb synch screws on an '82 CB650 engine with the CV carbs while the engine is running and  the vacuum gauges are hooked up?!  ::)

 I managed to break the set screws loose on #1 and #4. I guess I'm going to have to synch them, remove the hoses and barbs, and then very carefully tighten the set screws. I just don't see how I'm supposed to work in that area.


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'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline trueblue

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Re: CB650 carb synch screws
« Reply #1 on: August 15, 2013, 02:02:32 am »
They are a b!tch to get at, but the best thing I have come up with is back off the lock nuts, adjust then carefully tighten the nuts trying to not move the screws ;D
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1979 CB650Z
Nothing can be idiot proofed, the world keeps producing better idiots.
Electronic Guages for your SOHC 4

Offline LesterPiglet

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Re: CB650 carb synch screws
« Reply #2 on: August 15, 2013, 02:07:55 am »
Won't this satisfy your needs?

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Offline trueblue

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Re: CB650 carb synch screws
« Reply #3 on: August 15, 2013, 02:27:44 am »
Or you could just use the correct tool for the job ;D
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1979 CB650Z
Nothing can be idiot proofed, the world keeps producing better idiots.
Electronic Guages for your SOHC 4

Offline Scott S

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Re: CB650 carb synch screws
« Reply #4 on: August 15, 2013, 04:11:21 am »
Quote from: trueblue on August 15, 2013, 02:27:44 am
Or you could just use the correct tool for the job ;D

 And that would be.....? Why do you think I asked?

 I did like Trueblue suggested and adjusted #1 and #4. I don't see how you'd get to #3 no matter what tool you have. The linkage, throttle cable and fuel line are all in the way, as well as the backbone of the bike (at least on my CB500, anyway).
 
 I know that #3 is still out a little bit, but this is the best I could do. It already made a big difference in how the engine sounds and runs.

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'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline trueblue

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Re: CB650 carb synch screws
« Reply #5 on: August 15, 2013, 05:05:21 am »
Quote from: LesterPiglet on August 15, 2013, 02:07:55 am
Won't this satisfy your needs?


This is the proper tool ;)
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1979 CB650Z
Nothing can be idiot proofed, the world keeps producing better idiots.
Electronic Guages for your SOHC 4
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