Throttle body sync?

[Keith Hoffman]

Have received a 2004 Breva 750ie that I think would profit from a synchronization of the throttle bodies. Is this something a 50% handy person could do? The closest dealer is 100 miles away. I thought I had a local shop who could do work like this but they say no...
Keith Hoffman
Goshen, IN

 

[john zibell]

The sync is straight forward. Never touch the sacred screw (left throttle body stop screw). The problem is once you sync, you have to electronically reset the throttle body using software. Without it, you shouldn't do the sync. See: https://www.guzzitech.com/forums/threads/new-alaris-centurion-vdsts-info-instructions.1676/ The 750 Breva has the 15RC ECU which has a few quirks explained in the quoted thread.

 

[backonabike]

I just want to confirm if we dont touch this screw:


and adjust bypass (if needed):


or adjust the linkage:


we should be ok without resetting Throttle Position Sensor (TPS) correct?

 

[Kevin.NZ]

Correct -do not touch the "throttle stop screw" or you will be screwed. The bypass are only for tick over with throttle closed, the linkage is to set balance at about 3000 rpm. If you adjust that you need to do a TPS reset and use relevant software as John says. That's what I do on my Breva 1100

 

[backonabike]

I have a 2012 v7 racer but just trying to learn, and I read in threads to follow the instructions from brava1100 manual.

so basically MGs are setup to read mixture from the LH cylinder, and the RH cylinder must match to this "master". Would this be correct understanding? Also if at idle the TB are not balance can I use the stop screw on the RH cylinder to match?

TIA

 

[Kevin.NZ]

They do not read the mixture from the left cylinder, that is done by an Oxygen sensor sometimes called a Lambda Sonda and that is down by the cat after the 2 exhausts have joined, the screw you adjust to balance (not bypass screws) makes sure the two throttle bodies are perfectly matched and when the throttle is opened they track at the same angle. On my Breva the TPS is on the RH throttle body. From memory when the throttle is shut the TPS should read 4.6 degrees, that's why you need the software. I strongly advise against turning the throttle stop screw. I use a manometer to balance the throttle bodies at tick over and 3000rpm .

 

[scott_m]

I just want to confirm if we dont touch this screw:
View attachment 18578

and adjust bypass (if needed):
View attachment 18579

or adjust the linkage:
View attachment 18580

we should be ok without resetting Throttle Position Sensor (TPS) correct?

Although I wrote this for the Stelvio, the process is the same.

C

Thread 'Syncing Throttle Bodies- Stelvio 8V'

Jul 17, 2012

Tried searching for a detailed procedure for syncing the throttle bodies (with pictures) and have not been able to find one for the Stelvio 8V. The service manual is not bad, but talks about using the bypass screws to adjust. Found a procedure on here for a different bike saying not to use the bypass screws, but only the throttle linkage. Needs some help....carbs I understand, still trying to get used to the FI......

Is there a detailed procedure.

• canuck1969
• Replies: 66
• Forum: Stelvio Chat & Tech

 

[valeral80]

Hi, I own 2012 V7 Racer (USA) and I would like to know some tips about cylinder synchronize procedure. I was reading the service manual but some instructions are not clearly. Also, I did my own research without any result. I trying to localize the intake pipe hole to connect the Carbtune 4 PRO hoses (only two of them). In the attached picture I point out (orange circle and arrow) the supposed screw that the manual indicates to connect the hose.

I already download the software and I have a dedicate laptop for my bike.

I appreciate your help to show me a picture of that intake pipe hole.

Thanks in advance !!!

 

[GTM®]

In the attached picture I point out (orange circle and arrow) the supposed screw that the manual indicates to connect the hose.

That is the injector cover, not the sync location. Remove that cover, and take a better photo.