Throttle Body #1 adjusting screw many questions - Yamaha FZ6 Forums - International FZ6 Motorcycle Community Forum

SeaPup · 12-23-2008, 09:41 PM

Does anyone know what the factory setting is for Throttle Body #1 adjusting air screw? this is the throttle body that is to be used as a standard for the other throttle body's when synchronizing a 2007/2008 FZ6.

Plus does anyone know what the screws are actually doing?
are they increasing vacuum in each throttle body? or are they leaning or enriching each throttle body? I don't know.

Does Clockwise turning increase air flow or decrease
Does Counterclockwise turning increase air flow or decrease.

I put a vacuum gauge on throttle body #1 but it just does not make sense to me. Specs say 218 mmHg or 8.6 inHg.
My Vacuum gauge reads about 23 inHg and the minimum I can adjust is 20 inHg with the screw all the way in.

I don't feel right with the screws all the way in so I set Throttle body #1 to about 22.5 inHg and then set the rest of the throttle bodys to the same using the vacuum gauge on each throttle body one at a time. I then put all 4 throttle bodys on my Motion Pro tuner which does not have Mercury but some blue barmetric pressure water. This only tells me if the levels are close. So yeah I have the levels the same but I don't know if the vacuum is correct.

Here is a link to the vacuum gauge I used
Harbor Freight Tools - Quality Tools at the Lowest Prices

Also when using the gauge the needle fluctuates very fast from Zero to max vacuum achieved, the gauge needle does not go to a vacuum level and stay there like the motion pro stick.

Many questions, just trying to get a better understanding than just turn a few screws and getting the levels the same on the Motion Pro Sync Stick.

**Stumbles06** · 12-23-2008, 09:55 PM

If you seek out a member here named Fred, he'll probably be able to answer your questions.

He made a video at one stage when syncing throttle boddies, have a look and see if it helps.
http://www.fz6-forum.com/forum/fz6-t...nch-movie.html (Throttle body synch movie.)

Red Wazp · 12-24-2008, 11:58 AM

Don't know about vac levels but I was told to use #3 as the base for the others. I just use a motion pro mercury stick. Bike seems happy.

Fred · 12-24-2008, 02:21 PM

I've been assuming that cylinder #1 was the one that was connected to the MAP sensor. So it's important that the manifold pressure on cylinder #1 be set to the value in the manual.

As to what they bypass screws do, they just let a little air past the throttle plates, and are adjustable so that you can balance the cylinders.

I've never adjusted cylinder #1, I just tuned #2, #3 and #4 to match it. But the procedure is in the manual. Go through it step by step and you should be fine.

**opds9091** · 01-06-2009, 05:36 PM

what type of syncro did you use, and are there brands different or it doesn't matter

**Nelly** · 01-06-2009, 10:46 PM

Quote:

Originally Posted by SeaPup

Does anyone know what the factory setting is for Throttle Body #1 adjusting air screw? this is the throttle body that is to be used as a standard for the other throttle body's when synchronizing a 2007/2008 FZ6.

Plus does anyone know what the screws are actually doing?
are they increasing vacuum in each throttle body? or are they leaning or enriching each throttle body? I don't know.

Does Clockwise turning increase air flow or decrease
Does Counterclockwise turning increase air flow or decrease.

I put a vacuum gauge on throttle body #1 but it just does not make sense to me. Specs say 218 mmHg or 8.6 inHg.
My Vacuum gauge reads about 23 inHg and the minimum I can adjust is 20 inHg with the screw all the way in.

I don't feel right with the screws all the way in so I set Throttle body #1 to about 22.5 inHg and then set the rest of the throttle bodys to the same using the vacuum gauge on each throttle body one at a time. I then put all 4 throttle bodys on my Motion Pro tuner which does not have Mercury but some blue barmetric pressure water. This only tells me if the levels are close. So yeah I have the levels the same but I don't know if the vacuum is correct.

Here is a link to the vacuum gauge I used
Harbor Freight Tools - Quality Tools at the Lowest Prices

Also when using the gauge the needle fluctuates very fast from Zero to max vacuum achieved, the gauge needle does not go to a vacuum level and stay there like the motion pro stick.

Many questions, just trying to get a better understanding than just turn a few screws and getting the levels the same on the Motion Pro Sync Stick.

Yep speak to Fred, in fact if you do a search of throttle body adjustment he has posted a video how to.

Nelly

01-06-2009, 05:36 PM	#5
opds9091 Super Member Bike: 07' Yamaha FZ 6 Join Date: Sep 2007 Location: cape coral, FL Posts: 1,075 Thanks: 300 Thanked 82 Times in 60 Posts Rep Power: 20 Feedback Score: 0 reviews	Re: Throttle Body #1 adjusting screw many questions what type of syncro did you use, and are there brands different or it doesn't matter __________________ DOMINIC My Mods- Scorpion C/F cans, arrow mid-pipe,PC111, air box, K&N air filter, speed-0-healer, Dual headlight mod, yellow bulbs, red led kit, F/E, -1/+2 rear sprocket in black, 520 red chain, belly pan, seat cowl, rim stickers, Yamaha logo, Puigg windscreen, FZ6 extended frame sliders, Rizoma grips & bar ends &bars, Pro-Bolt red engine kit, gas cap kit, red sprocket bolts, red radiator panels, red foot pegs, OSO2K rear set plate's, LSL fork sliders & swing-arm sliders.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Throttle body synch movie.	Fred	FZ6 Technical	28	07-21-2009 10:39 AM
Throttle Body Synchronization	xj750_Pete	Garage / Mechanical Help	72	11-19-2008 04:23 PM
Throttle Body Sync Hose	mglowe	Garage / Mechanical Help	4	09-15-2008 04:24 PM
Throttle Body adjustment	Buford	FZ6 Technical	14	05-31-2008 11:32 AM
Throttle Body Sync	pyroclastic	FZ6 Technical	9	05-04-2008 07:26 PM

12-23-2008, 09:41 PM	#1
SeaPup Junior Member Bike: FZ6 Join Date: Apr 2008 Location: USA Posts: 37 Thanks: 0 Thanked 5 Times in 3 Posts Rep Power: 7 Feedback Score: 0 reviews	Throttle Body #1 adjusting screw many questions Does anyone know what the factory setting is for Throttle Body #1 adjusting air screw? this is the throttle body that is to be used as a standard for the other throttle body's when synchronizing a 2007/2008 FZ6. Plus does anyone know what the screws are actually doing? are they increasing vacuum in each throttle body? or are they leaning or enriching each throttle body? I don't know. Does Clockwise turning increase air flow or decrease Does Counterclockwise turning increase air flow or decrease. I put a vacuum gauge on throttle body #1 but it just does not make sense to me. Specs say 218 mmHg or 8.6 inHg. My Vacuum gauge reads about 23 inHg and the minimum I can adjust is 20 inHg with the screw all the way in. I don't feel right with the screws all the way in so I set Throttle body #1 to about 22.5 inHg and then set the rest of the throttle bodys to the same using the vacuum gauge on each throttle body one at a time. I then put all 4 throttle bodys on my Motion Pro tuner which does not have Mercury but some blue barmetric pressure water. This only tells me if the levels are close. So yeah I have the levels the same but I don't know if the vacuum is correct. Here is a link to the vacuum gauge I used Harbor Freight Tools - Quality Tools at the Lowest Prices Also when using the gauge the needle fluctuates very fast from Zero to max vacuum achieved, the gauge needle does not go to a vacuum level and stay there like the motion pro stick. Many questions, just trying to get a better understanding than just turn a few screws and getting the levels the same on the Motion Pro Sync Stick.

12-23-2008, 09:55 PM	#2
Stumbles06 The Lurking Admin Bike: 2004 FZ6S Join Date: Apr 2008 Location: Adelaide, Australia (GMT +9.5) Posts: 2,361 Thanks: 1,322 Thanked 1,331 Times in 751 Posts Rep Power: 10 Feedback Score: 0 reviews	Re: Throttle Body #1 adjusting screw many questions If you seek out a member here named Fred, he'll probably be able to answer your questions. He made a video at one stage when syncing throttle boddies, have a look and see if it helps. http://www.fz6-forum.com/forum/fz6-t...nch-movie.html (Throttle body synch movie.)

12-24-2008, 11:58 AM	#3
Red Wazp Super Member Bike: 07FZ6, 04FJR1300, 00KLR650,87XT350 Join Date: Mar 2008 Location: Peardale, Ca Posts: 1,018 Thanks: 113 Thanked 282 Times in 212 Posts Rep Power: 18 Feedback Score: 0 reviews	Re: Throttle Body #1 adjusting screw many questions Don't know about vac levels but I was told to use #3 as the base for the others. I just use a motion pro mercury stick. Bike seems happy. __________________ I want Al Gore's carbon footprint!

12-24-2008, 02:21 PM	#4
Fred M em b er e d Bike: See Signature Join Date: Nov 2007 Location: Austin, TX Posts: 1,627 Thanks: 323 Thanked 1,185 Times in 522 Posts Rep Power: 57 Feedback Score: 0 reviews	Re: Throttle Body #1 adjusting screw many questions I've been assuming that cylinder #1 was the one that was connected to the MAP sensor. So it's important that the manifold pressure on cylinder #1 be set to the value in the manual. As to what they bypass screws do, they just let a little air past the throttle plates, and are adjustable so that you can balance the cylinders. I've never adjusted cylinder #1, I just tuned #2, #3 and #4 to match it. But the procedure is in the manual. Go through it step by step and you should be fine. __________________ 1990 BMW K75 Turbo (Garrett GT-15 turbocharger. Megasquirt ECU controlling fuel and spark. LC-1 Wideband O2 sensor. Paralever conversion. Currently getting a front brake and wheel upgrade.) 2007 Yamaha FZ6 (Modifications: Stebel Nautilus horn, Valentine 1 hardwired with remote display and audio, Mix-It sound mixer modified for hidden installation, Mayer saddle, true dual high/low headlights. Relay, fuse panel and lockdown blocks for all additional wiring. R6 fork. RyanK fender mounts.)

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)