Carburetor tuning

[Zs-ondabrain]

Oops, your right but you get the idea. You don't have to remove the carbs for adjusting them. Leave them on.

as for number 4, make sure it's not activating the throttle.

[Frankensteinz2]

too late i took them off

but i did discover that my bendable bars was holdin my butterfly open a little bit

Now i can idle but balancin is tricky

The front carb races the engine rpm up when i put the sychro over it even with the mixure nut all the way up and the rear carb sputters the engine with the sychro on it

With adjusting the balance screw and the throttle screw i can get the ball in the same place on both carbs however i get the opposite effect on the engine rpm

[beandip]

Just one more thing. When you lift the vacuum piston in the carb, by reaching in the intake with your finger and lifting the piston up. When you let it go does it drop freely with a clunk when it reaches bottom? If it does not then the needle to nozzle is out of alignment. Or the needle is bent. On a 3 screw, the adjustment for alignment is done by moving the dome one way or another. There is supposed to be cone shaped plastic or epoxy alignment ''pins'' on the body of the carb that fit into the dome and align it. These were done at the time of assembly at the point of manufacture. If these are missing then you will need to align things . On Four screw carbs the nozzles are adjustable.

[Frankensteinz2]

yep they are fallin freely with a clunk at the bottom

I bought new needles and nozzles from z therapy and installed them

looks to be operating correctly with out binding

[Frankensteinz2]

Alright after a bit of playin/ trial and error, i have my idle at about 900 with good throttle response, I didn't really notice alot of sensitivity from the mixture nuts, I'd turn both of them one way a turn or 2 and then the other and did hear much of a change

If i changed them vastly i would notice a difference in rpm, so i just went by ear and tried to get close

I set my timing to 17 degrees btdc at around 900 rpm, i think thats set, I still need to reset the valve lashs hot though

Hopefully once i reinstall my clutch fork WITH the holder spring, i'll get to drive her FINALLY after 4 hard months of full time restoration

After that all i have to do is fix the ELECTRIC, YUCK!

Wish me luck

Frankie

[z74z90]

Take a look at this...it is all there...

http://www.teglerizer.com/sucarbs/techtip6.htm

[Frankensteinz2]

Yeah i have followed that pretty step by step, I think most of my problems are just the age of the carbs. Probably my throttle shafts are leakin and my linkages are worn. Im gonna keep workin on them and see if i can get them more finally tuned.

Thanks everyone for the input

Frankie