Throttle body position

[Meshuggah]

Hello everyone,
so I bought this vaccum gauge to check my tbp. when I plug it in this is what happens and I can take any reading.

https://www.youtube.com/watch?v=IjgiZCrnHiY

as usual any help would be much appriociated.
thanks.
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Triumph Tiger 800 2012

[Pete.]

You gotta tweak the dampers to stop the needles flapping about. They'll snap off like that. Apart from that the balance actually looks pretty good.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Taught2BCauti...]

I think you are trying to do it with the revs too low - hence the fluctuations.

Assuming you have connected the tubes to the inlet stubs correctly, try it again between 1500 and 2000 rpm.

Like this.
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Honda Varadero XL125(V8)
www.TheFutureIsHere.eu

[Meshuggah]

ok this is what happened so far:
I've read in the manual that at idle the hg should be 280.
That's not the case. at idle (1320 1380) the gauge shows points into the red zone. Only if I accelerate they go up.
The manual says to not touch the screw number 1 but regulate 2 3 and 4 according to it. that;s what I tried to do at first. Then I thought that n1 may need to be turned to reach 280 at idle. I did it and nothing happened. just a slight change but it still sits in the red zone. Now I have all the 4 screw almost completely turned in. this is what happens
https://www.youtube.com/watch?v=KbtURzOVEn4

It seems they all move at the same time and with the same amount but I have no idea if it's correct . the red area states : late valve intake, mainfold leak or heat riser.

Any suggestions? Thanks.
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Triumph Tiger 800 2012

[orac]

ignore the text on the gauges, all looks fine to me, although 3 and 4 are a bit off imho
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Current rides - 2016 Triumph Street Triple Rx, 1994 Suzuki Bandit 400 VM, TGB 204 Classic 125cc
"with nothing left to lose, there is everything to gain. It's not the size of the dog in the fight, it's the size of the fight in the dog"

[Vincent]

What's "tbp"
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Space Is Deep

[Pete.]

[Vincent]

To set them up, you need to find out where no.1 gauge is at a certain engine speed, slightly above tickover is good. Then, replace that gauge with the next one and make sure it's at the same place at those revs. Repeat this procedure for nos. 3 and 4 gauges so you know they're all reading the same. Then stick them all back onto each cylinder and make sure they all move together when you open the throttle.

As above, you will need some sort of baffle to stop the needles flickering about.
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Space Is Deep

[Vincent]

Ah....didn't notice the second vid where the needles aren't flying about
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Space Is Deep

[Meshuggah]

[Meshuggah]

[Pete.]

The lower the revs when you do the throttle balancing, the closer you'll get them - so long as the throttles aren't worn to the point that the readings shift about a lot when you flcick the throttle.

The numbers are pretty-much meaningless because they are affected by several factors, useful only as a comparative scale so you can get them all the same. That's all you're aiming for really.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Vincent]

[Meshuggah]

thanks for the input everyone. I've resync the TBP while keeping the bike around 3000 rev. They look at the same spot now.
One thing I'm wandering. If the text on the gauge doesn't matter then how do you know when the first cylinder is properly synced?
I mean it could be all the way screwed in or all the way out. How would you know the correct position? (I use number 1 as a guide to sync all the others)
thanks.
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Triumph Tiger 800 2012

[Vincent]

[Meshuggah]

[Pete.]

All you're trying to achieve is that they all draw the same air in when the throttle is closed against the idle stop. What position the screws are actually in doesn't matter a damn EXCEPT that if you have one screwed against the stop you could well run out of adjustment on one of the others.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Vincent]

You're not setting anything on the throttle bodies other than them all opening up at the same time. Not the mixture, not the idle....nothing else at all.

As others have said, ignore all the writing on the dials. The people that put them tools together just use the cheapest dials they can find and they were probably intended to use on cars originally.
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Space Is Deep

[Meshuggah]

Sorry for my ignorance but I'm learning as I go along. I forgot to mention I have a Power commander 3 installed. Will that make any difference?
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Triumph Tiger 800 2012

[Pete.]

[Meshuggah]

[Pete.]

TBP is the wrong terminology. I never heard it called that and it will confuse people into thinking you are on about TPS (throttle position sensor).

Throttle balancing is what you're doing. If you had carbs instead of FI it would be carb balancing.

The purpose of throttle balancing is not to make them all open at the same time - they will do that no matter what - but to adjust them to all be open the same AMOUNT and therefore produce a similar sized explosion in each cylinder which in turn will provide a smooth idle. This only really affects idle and off-idle, for wider throttle openings balancing has very little effect.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good