Topic: syncing carbs, noob question which bol/screw to adjust???

[shizzomynizzo]

This might sound like a stupid question, but I am new to working on the honda cb, and carburetors in general. I built a manometer similar to the ones on the forum, and am planning on doing a sync tomorrow, but don't know which bolt and screw to adjust in order to sync them.

already replaced plugs, adjusted valves, cam chain, cleaned carbs, rebuilt petcock, changed oil/ air filter, replaced points and condensers, adjusted timing...I'm probably forgetting something that I did, but anywho......

Back to the question...what bolt and screw do I use to sync the carbs?



I believe it is the ones in the pic numbered 1 and 3, but want to be sure before i 'ef something up.

loosen 3, and then adjust by turning number 1

Thanks for the help and support

[Hush]

What year and cc model etc, always helps us answer and usually you get replies from guys with the same machines.

[shizzomynizzo]

sorry, i've been pretty good about that until now

1974 550

the pic is right out of the manual, but it didn't give good instruction on how to sync. Mine look identical to the pic

thanks again

[Hush]

OK I guess America is asleep right now (or is it 8am right now?) anyhow there are a couple of 550 gurus on here who can be totally relied upon to give you top advice mate....sorry I'm a lowly 650 owner and they are soooo different my advice might cost you money......TT  where are you?

[Gordon]

#1 is the adjustment screw.  Loosen the locknuts, make your adjustments, and then tighten them down again. 

[andy8190]

the lock nut is #2, thought i would clarify it since he didnt, dont mess with 3

[shizzomynizzo]

real good guys. 

The manuals ain't worth $#!t for a few things, including syncing!

I think I know what I am doing now, I'll let ya guys know how it turns out after I finish.

Thanks again 

I know everyone likes pics, so here's a pic of my manometer, I will get pics of the bike up tomorrow

[Hush]

Hey that's cool, what are you filling it with? or do you fill it with anything!
I know some use water and some use mercury, air ones use wee plastic balls.

[shizzomynizzo]

well I cannot get my hands on mercury, unless i break open a bunch of old thermometers, so thats out.

From what i've read on here, auto trans fluid is my best bet...won't hurt the engine if it gets sucked in (just a little smoke) and it's easy to see since it's red.

I spent $5 on 50 feet of tubing, and $2.68 on the 3 way t's.

Not too shabby in my opinion

[Johnny5]

Yeah, ATF is the way to go. Plus it's red and easy to see. I made a manometer for my old two cylinder bike.