Is this screw with yellow paint the one for carb syncing?

Floki · January 17th, 2014, 01:31 PM

Is it? It's attached to the throttle cables.

Flying · January 17th, 2014, 01:50 PM

That screw appears to be the throttle adjusting screw.

Ron Ayers parts fiche marks that screw as #92001-1998 "BOLT,THROTTLE ADJUST".
A closer look at the service manual confirms the orientation of the screw.

In addition, the throttle adjuster seems to be the only screw w/ a spring that is oriented parallel with the entire carb assembly. So the top of the screw would be parallel w/ the diaphragm cover.

Floki · January 17th, 2014, 01:58 PM

So what screw adjusts carb vacuum?

Flying · January 17th, 2014, 02:02 PM

The same screw. You're controlling how much air goes through each carb at idle, affecting the vacuum.

Floki · January 17th, 2014, 02:27 PM

So this is the screw to adjust when syncing the carbs? It's not like the idle screw is it?

Flying · January 17th, 2014, 02:37 PM

That's the screw you're looking for.

bruce71198 · January 17th, 2014, 02:54 PM

Yes that is the screw to sync the carbs. It will open or close the left carb until it matches the right one.

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January 17th, 2014, 01:50 PM	#2
Flying ninjette.org sage Name: - Location: somewhere cold Join Date: Jun 2013 Motorcycle(s): 2010 Ninja 250 Posts: 596 Blog Entries: 1	That screw appears to be the throttle adjusting screw. Ron Ayers parts fiche marks that screw as #92001-1998 "BOLT,THROTTLE ADJUST". A closer look at the service manual confirms the orientation of the screw. In addition, the throttle adjuster seems to be the only screw w/ a spring that is oriented parallel with the entire carb assembly. So the top of the screw would be parallel w/ the diaphragm cover.

January 17th, 2014, 01:58 PM	#3
Floki Motorcycle Nurse? Name: Jacques Location: Gulf Coast Join Date: Sep 2013 Motorcycle(s): 2010 250R, 1998 Ducati 748L #77/100 Posts: 606	So what screw adjusts carb vacuum?

January 17th, 2014, 02:02 PM	#4
Flying ninjette.org sage Name: - Location: somewhere cold Join Date: Jun 2013 Motorcycle(s): 2010 Ninja 250 Posts: 596 Blog Entries: 1	The same screw. You're controlling how much air goes through each carb at idle, affecting the vacuum.

January 17th, 2014, 02:27 PM	#5
Floki Motorcycle Nurse? Name: Jacques Location: Gulf Coast Join Date: Sep 2013 Motorcycle(s): 2010 250R, 1998 Ducati 748L #77/100 Posts: 606	So this is the screw to adjust when syncing the carbs? It's not like the idle screw is it?

January 17th, 2014, 02:37 PM	#6
Flying ninjette.org sage Name: - Location: somewhere cold Join Date: Jun 2013 Motorcycle(s): 2010 Ninja 250 Posts: 596 Blog Entries: 1	That's the screw you're looking for.

January 17th, 2014, 02:54 PM	#7
bruce71198 ninjette.org sage Name: bruce Location: northern illinois Join Date: Jan 2012 Motorcycle(s): Race bikes:08 Ninja 250,11 R6,16 ZX6,SV650.3 HD-1947,2-2003,2010. 1946 Indian and a lot of dirt bikes.2 Posts: 999	Yes that is the screw to sync the carbs. It will open or close the left carb until it matches the right one.