Throttle Body sync question---why, not how - Road Star Warrior Forum : Yamaha Star Warrior Forums

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Old 06-06-2013, 05:20 PM   #1 (permalink)
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Default Throttle Body sync question---why, not how

Today I sync'd my throttle bodies. Pretty easy to do really. I noticed since doing so that my bike starts a LOT quicker and easier than it did before. It's also noticeably smoother (less motor vibration). I can't really feel any difference in riding it (pull, torque, etc...), but that's not why I did it.

So as I was tooling away, I thought to myself "Self, why would these go out of sync?". So I'll pose the question to the forum here...what would cause something to go out of sync if it's left unmolested?

Do tell....
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Old 06-06-2013, 06:24 PM   #2 (permalink)
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i just posted on the 3000 rpm vibe. i wonder if they sync-ed my TB's and that's why it's so much smoother. but yeah, how do they get out of sync in the 1st place.
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Old 06-06-2013, 07:26 PM   #3 (permalink)
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how does anything get out of adjustment in the first place. to quote John Bender "Screws fall out all the time, the world is an imperfect place".

vibration, movement of the throttle linkage, heat cycles etc etc
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Old 06-06-2013, 07:30 PM   #4 (permalink)
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Quote:
Originally Posted by sanny651 View Post
...what would cause something to go out of sync if it's left unmolested?

Do tell....
not being a smartass but "unmolested" is a relative term. truly unmolested would indicate constants involving humidity, temp, light, motion, atmospheric pressure etc etc. I know that is an extreme example but I would say due to vibration alone nothing on our bikes remains unmolested once the engine fires
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Old 06-06-2013, 07:55 PM   #5 (permalink)
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Quote:
Originally Posted by Mike7202 View Post
not being a smartass but "unmolested" is a relative term. truly unmolested would indicate constants involving humidity, temp, light, motion, atmospheric pressure etc etc. I know that is an extreme example but I would say due to vibration alone nothing on our bikes remains unmolested once the engine fires
Well said


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Old 06-07-2013, 05:42 PM   #6 (permalink)
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Perhaps to help me better understand this, let me ask another more technical question. What do the vacuum lines do... What service do they provide on these bikes? What governs and provides this vacuum (... And don't say the screw governs it. :-) The screw does something besides just threading into the TB).

I'd like to understand this more, if no other reason than to further fill the area of my brain that houses information I'll never use or truly understand.

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Old 06-10-2013, 10:00 AM   #7 (permalink)
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anyone?
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Old 08-15-2013, 11:39 PM   #8 (permalink)
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I realize this post is a few months old but is there a link to a throttle body syncing procedure someone could point out? The iPhone app search doesn't wanna find anything for me tonight.


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Old 08-16-2013, 12:21 AM   #9 (permalink)
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Mine now vibrates mode than it did. So can I do a synch in my garage or is if off to the stealership ?
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Old 08-16-2013, 12:27 AM   #10 (permalink)
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If you make your own manometer or get a real kit for this,yes you can do it yourself. There is a thread here that shows how to.

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