Synchronizing the Throttlebodies

[pierrevtx1800]

Is anyone know the factory set up for the 3 air idle srew on the throttle body i try to adjust whit carbtune but the result is not good want to return to factory default set up .

 

[smoothride]

Never did but you say its worth checking huh? Been awhile but I do have a guage set for the bikes. Does the IACV have a effect on this? Its only on one Throttlebody I believe?

There is a port on each throttle body. My centre throttle body was almost closed off. And it will make it stumble at idle and it will hesitate when you hit the throttle. The dealer willn't like to do this because you have to take off the hood and gas tank cowl to get at the adjustment screw. Yamaha is very well none to close one off. My Yamaha super tenere was closed on one side. They do this for emissions. I open the centre port to 3/4 and then balance the out side ones. My sled doesn't hunt around at idle.

 

[Jord05]

There is a port on each throttle body. My centre throttle body was almost closed off. And it will make it stumble at idle and it will hesitate when you hit the throttle. The dealer willn't like to do this because you have to take off the hood and gas tank cowl to get at the adjustment screw. Yamaha is very well none to close one off. My Yamaha super tenere was closed on one side. They do this for emissions. I open the centre port to 3/4 and then balance the out side ones. My sled doesn't hunt around at idle.

Wow maybey that is my problem on mine I could not figure out why the hell it does that

 

[cannondale27]

There is a port on each throttle body. My centre throttle body was almost closed off. And it will make it stumble at idle and it will hesitate when you hit the throttle. The dealer willn't like to do this because you have to take off the hood and gas tank cowl to get at the adjustment screw. Yamaha is very well none to close one off. My Yamaha super tenere was closed on one side. They do this for emissions. I open the centre port to 3/4 and then balance the out side ones. My sled doesn't hunt around at idle.

I can do that. You use either of these two ports at each body?

And adjust using this screw?

 

[Oldschool71]

Will the dealers balance the throttle bodies or is it something I can do in my garage? Can someone explain the process?

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[grizztracks]

cannondale27, You should move throttle body info into a new thread and maybe we can do a write up on the procedure to sync the throttle bodies on a FI engine. I did a write up on the procedure for carb'd engines but haven't seen one for FI engines yet.

 

[smoothride]

I can do that. You use either of these two ports at each body?
View attachment 123339
And adjust using this screw?
View attachment 123340

The do believe the clutch side port has a hose hooked to it. And you use that one and there will be a port like you are showing on the other two throttle body's and that is the adjustment screw on each one. I started by opening up all three to 3/4 with the engine warmed up and then balanced out and left the centre one at 3/4. Not all engine will be the same tho. I have a four cylinder balancer. Yes they are around 150 bucks.

 

[Janne339]

cannondale27, You should move throttle body info into a new thread and maybe we can do a write up on the procedure to sync the throttle bodies on a FI engine. I did a write up on the procedure for carb'd engines but haven't seen one for FI engines yet.

 

[Janne339]

There is a port on each throttle body. My centre throttle body was almost closed off. And it will make it stumble at idle and it will hesitate when you hit the throttle. The dealer willn't like to do this because you have to take off the hood and gas tank cowl to get at the adjustment screw. Yamaha is very well none to close one off. My Yamaha super tenere was closed on one side. They do this for emissions. I open the centre port to 3/4 and then balance the out side ones. My sled doesn't hunt around at idle.

If one throttle body is almost close than one cylinder is lost of air in upstart? Maybe thats why we sometimes have kickbacks?

 

[cannondale27]

cannondale27, You should move throttle body info into a new thread and maybe we can do a write up on the procedure to sync the throttle bodies on a FI engine. I did a write up on the procedure for carb'd engines but haven't seen one for FI engines yet.

Yes. Good idea.

 

[cannondale27]

Here is another thing I have just found. Maybe we need these hoses to sensor. Easy enough to try!

 

[Janne339]

Here is another thing I have just found. Maybe we need these hoses to sensor. Easy enough to try!
View attachment 123412

I think you are closer to the main problems of idle and kickbacks than the new flash. Never heard about kickbacks on Nytros?

 

[allyammies]

Here is another thing I have just found. Maybe we need these hoses to sensor. Easy enough to try!
View attachment 123412

Good thing you don't sleep Steve! Nice find.

 

[Janne339]

The new flash seems to be a joke. So all we Viper owners at the forum should donate some money that is dedicated to the person who once and for all solve the main problems with poor idle and kickbacks on the Viper.

 

[STAIN]

Here is another thing I have just found. Maybe we need these hoses to sensor. Easy enough to try!
View attachment 123412

These are the hoses I was talking about earlier, was it this thread or another? During the turbo install those ports were utilized. Good find.