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when do you snych while tuning carbs?

  • Thread starter Thread starter maro
  • Start date Start date
M

maro

Guest
GS1100EZ / CV34mm / old yosh 4-1

my carbs are close. It's a bit rich on the mains (122.5), I bought both 120 and 117.5's. Once I get the mains dialed in, I will adjust my dynajet needle and then the pilots.

When do I synch?

Do I synch before I test the main circuit with the new mains? Should I synch between completions of each circuit?


**NOTE: Not sure if I will actually run true Plug Chops as it's not condusive where I live (in the middle of a bustling city where there really isn't a place to cut the engine and pull over on the only straigh away (I-95)). I will test the curcuits based on overall plug readings and proper pull in each range.:rolleyes:

I have the morgan on order!
 
Jetting doesn't have anything to do with sync, do it when ever you get a hankerin.
 
Huh, well, that's good. I guess I can begin swapping in jets and testing.:)
 
While jetting doesnt't affect sync, the carbs being out of sync & causing the bike to run rough might have you chasing something that isn't a problem. I have always done them in this order: Install, adjust mixture screws CORRECTLY, sync, mains, then needles. It makes the bike idle smoothly & eliminates you chasing rough running issues that just might be the pilot circuit or the sync. Good luck, Ray.
 
rapidray said:
I have always done them in this order: Install, adjust mixture screws CORRECTLY, sync, mains, then needles. It makes the bike idle smoothly & eliminates you chasing rough running issues that just might be the pilot circuit or the sync.
Click to expand...
Can't argue with Ray's advice, but would add just a bit to it.
Before installing, do a bench sync and set the mixture screws to a preliminary setting of 2-3 turns out from lightly seated.

Personally, I will set the mixture screws, do a vacuum sync, then, while the gauges are still attached, check the mixture screws with the new sync setting and finally, double-check the sync to make sure nothing changed. I know it shouldn't, but it's easier to leave the gauges hooked up than it is to hook them up again. :o

maro said:
Not sure if I will actually run true Plug Chops as it's not condusive where I live ...
Click to expand...
I have not been to Philly, but I can't believe that you only have all city streets that lead to the freeways. :-k
Surely there are some country-ish roads where you can do plug chops without endangering the public or yourself.

.
 
Steve said:
]


I have not been to Philly, but I can't believe that you only have all city streets that lead to the freeways. :-k
Surely there are some country-ish roads where you can do plug chops without endangering the public or yourself.

.
Click to expand...

Hey steve,

Well, here's the thing, here is where my garage is located:
http://maps.google.com/maps?f=q&sou...,-75.159016&spn=0.070117,0.11673&z=13&iwloc=A

I'm sure I'll figure something out. The "country-ish" roads are only about 40 minutes out of town.:D
 
OK, I see you do have a definite problem there, but it's only about 15 miles west on Route 3 to get past Newtown Heights.
Yeah, it might take 45 minutes or so, but the effort would be worth the trip.

.
 
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