Record throttle body sync adjustment?! - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 11 Old 03-11-2006, 03:07 PM Thread Starter
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Record throttle body sync adjustment?!

I synced up the TB's today. Being a new bike (350 miles) I didn't think they would be too far off, but they were 2 feet off!

2 feet meaning in my homemade contraption using 2-stroke oil, the difference between the left and right level was 2 feet (maybe more)! Is this some kind of record?

FYI: Since turning the screw with needle nose pliers is tough, you might want to know which way to turn the screw depending on if the front or rear TB has more vacuum. On my DL1000 turning the screw counter clockwise will decrease the front TB vacuum (lowering the level). Turn clockwise would decrease the rear TB vacuum.

Anyway the bike runs a lot smoother. I'm glad I did it now instead of waiting because it may make a difference in engine break-in? Not sure. Revs really nice and smooth now especially at higher rpms.

'06 DL1000 - Grey
'89 GSXR 1100
'85 GS550E (Suz)
'75 Yamaha MX250B
'73 Yamaha MX125

Keep your feet on the pegs and your hand on the throttle.
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post #2 of 11 Old 03-11-2006, 03:26 PM
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It's hard to say if it's a record... Different fluids show differently due to the viscosity.

I have mercury sticks and mine were about an inch off. What a difference the sync makes!

Check out your TPS as well, mine was one bar off on the low side.

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-- 2013 KLR 650 --[/B]

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post #3 of 11 Old 03-11-2006, 03:47 PM Thread Starter
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According to the post I found on construction of this thing I used, the movement of oil vs. mercury is about 13/16" (oil) vs. 1/20" (mercury). So that means if you were off by an inch using mercury that would = about 16.25 inches if you were using oil. Mine was off AT LEAST 24 inches!

On the TPS, I heard you didn't need to worry about this adjustment. Something like it's never off or doesn't matter? I'll get more info on it however and adjust it if needed.

'06 DL1000 - Grey
'89 GSXR 1100
'85 GS550E (Suz)
'75 Yamaha MX250B
'73 Yamaha MX125

Keep your feet on the pegs and your hand on the throttle.
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post #4 of 11 Old 03-11-2006, 04:41 PM
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Good job Chris! Mine were *only* off by twelve inches or so....makes a difference, eh??

You DID turn the correct screw, didn't ya? heehee.

matt
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post #5 of 11 Old 03-11-2006, 04:46 PM
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Quote:
Originally Posted by ChrisW123
On the TPS, I heard you didn't need to worry about this adjustment. Something like it's never off or doesn't matter? I'll get more info on it however and adjust it if needed.
It only takes a few minutes to check it and adjust it, and it does make a difference.

You just short two pins in the connector under the left side panel, turn on the key and look at the bar. In the middle you're fine, top or bottom bar and your fuel delivery is not optimum.

The STPS (for the secondaries) is probably not as big a deal, but the TPS is pretty important.

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post #6 of 11 Old 03-11-2006, 05:09 PM Thread Starter
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Quote:
Originally Posted by xrmattaz
Good job Chris! Mine were *only* off by twelve inches or so....makes a difference, eh??

You DID turn the correct screw, didn't ya? heehee.
BIG DIFFERENCE! I turned the screw the wrong way the at first, because I thought I noticed the oil beginning to level out and just before the oil was about to overflow over the top of the yardstick, I quickly turned it the other way! Not sure how far I turned it but probably a total of 3/4 of a turn from its original position to get it right.

Warren, do you need a special device to check the TPS? What "bar" are you talking about? Is it on the instrument panel?

'06 DL1000 - Grey
'89 GSXR 1100
'85 GS550E (Suz)
'75 Yamaha MX250B
'73 Yamaha MX125

Keep your feet on the pegs and your hand on the throttle.
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post #7 of 11 Old 03-11-2006, 05:57 PM
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You need two things:

A security T25 Torx bit (torx bit with a small hole in the middle). You loosen the bolt to rotate the TPS.

I used a small paperclip, sharpened it a bit and bent it into a U shape to short the plug.

You then turn on the ignition and the bars are on the display.

The TPS is rotated to get the middle bar.

Outline:

http://vstrom.info/cgi-bin/moin.cgi/...r_%28TPS%29%3f

[B]-- Warren in San Diego --
-- 2013 KLR 650 --[/B]

-- [URL="http://www.klr650.net/forums/showthread.php?t=47348"][COLOR=blue]Click Here For My Free KLR Valve Adjustment Shim Calculator[/COLOR][/URL][COLOR=blue] [/COLOR] --

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post #8 of 11 Old 03-13-2006, 11:52 PM
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I feel bad for you. I fashioned the homemade manometer using ATF and a yard stick. Using previously installed tubes to the carb nipples (!) I got a whopping 1" difference (after 24,000 miles). I adjusted it to get 3/4 inch the other way. Lucky, I guess. I hesitate to test/measure anything else on the bike.

2004 dl650-the urban warrior.
2007 R1200RT - the highway beast
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post #9 of 11 Old 03-16-2006, 09:42 AM
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Quote:
Originally Posted by Warren
You need two things:
Warren,
Were you able to adjust the TPS with the tank and all still intact? I did a TPS when I sync'd by throttle bodies and installed a new air filter, so it was all disassembled, however, it looked like I could probably accomplish the TPS with everything still on the bike (tank, etc.). I installed vaccum tubing to make my next sync easier, and was curious if I could do both a sync and TPS adjustment without removing the tank.

Thanks,
Bill
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post #10 of 11 Old 03-16-2006, 02:20 PM
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Yes, you can reach up and get to everything.

[B]-- Warren in San Diego --
-- 2013 KLR 650 --[/B]

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-- [URL="http://www.vstrom.info/Smf/index.php/topic,10863.0.html"][COLOR=blue]Click Here For My Free V-Strom Valve Adjustment Shim Calculator[/COLOR][/URL][COLOR=blue] [/COLOR] --
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