carb tune help/procedure

rctreadaway wrote: I would try bench syncing them first if you're having that much trouble. The main thing isn't the number, but that they're all even and moving together as closely as possible. i used a light looking through the carb and adjusted them down one at a time until the light was all but gone. Then put them on the bike and set the idle. It doesn't matter what order unless you have a lead carb. That would be the one without an adjuster. Just depends on your carbs. Mine all had adjusters so I just made sure they were all even.

I would check to make sure you're also getting good spark as well. The plugs in my bike were starting to foul when i purchased it.

Zephyrrider wrote: blink - do not bother with the actual readings -
try and get them all within + or - 2 cmhg of each other (may be slightly different to mine )
what model is yours ?
What kind of manometers are you using ?

blink543 wrote:

rctreadaway wrote: I would try bench syncing them first if you're having that much trouble. The main thing isn't the number, but that they're all even and moving together as closely as possible. i used a light looking through the carb and adjusted them down one at a time until the light was all but gone. Then put them on the bike and set the idle. It doesn't matter what order unless you have a lead carb. That would be the one without an adjuster. Just depends on your carbs. Mine all had adjusters so I just made sure they were all even.

I would check to make sure you're also getting good spark as well. The plugs in my bike were starting to foul when i purchased it.

I forgot to mention it's a 78 kz650b. I adjust them by turning the air screw on top of the carbs? They're minuki carbs or however u say it.

650ed wrote:

blink543 wrote:

rctreadaway wrote: I would try bench syncing them first if you're having that much trouble. The main thing isn't the number, but that they're all even and moving together as closely as possible. i used a light looking through the carb and adjusted them down one at a time until the light was all but gone. Then put them on the bike and set the idle. It doesn't matter what order unless you have a lead carb. That would be the one without an adjuster. Just depends on your carbs. Mine all had adjusters so I just made sure they were all even.

I would check to make sure you're also getting good spark as well. The plugs in my bike were starting to foul when i purchased it.

I forgot to mention it's a 78 kz650b. I adjust them by turning the air screw on top of the carbs? They're minuki carbs or however u say it.

? :blink: ? If you have a manual go back and re-read through the section on synchronizing the carbs. You do NOT fiddle with the air screws to synchronize the carbs. The air screws have nothing whatsoever to do with carb synchronization. Ed

650ed wrote:

blink543 wrote:

rctreadaway wrote: I would try bench syncing them first if you're having that much trouble. The main thing isn't the number, but that they're all even and moving together as closely as possible. i used a light looking through the carb and adjusted them down one at a time until the light was all but gone. Then put them on the bike and set the idle. It doesn't matter what order unless you have a lead carb. That would be the one without an adjuster. Just depends on your carbs. Mine all had adjusters so I just made sure they were all even.

I would check to make sure you're also getting good spark as well. The plugs in my bike were starting to foul when i purchased it.

I forgot to mention it's a 78 kz650b. I adjust them by turning the air screw on top of the carbs? They're minuki carbs or however u say it.

? :blink: ? If you have a manual go back and re-read through the section on synchronizing the carbs. You do NOT fiddle with the air screws to synchronize the carbs. The air screws have nothing whatsoever to do with carb synchronization. Ed

blink543 wrote:

650ed wrote:
? :blink: ? If you have a manual go back and re-read through the section on synchronizing the carbs. You do NOT fiddle with the air screws to synchronize the carbs. The air screws have nothing whatsoever to do with carb synchronization. Ed

They do. In the manual it says it's supposed to mess with the air to fuel mix. Then what does it do