Throttle control

[spottedtango]

I've noticed when you roll on the throttle gradually and quickly , the bike seems to accelerate much better/quicker than opening the throttle without thinking much about it and waiting for the engine to catch up.

I know by rolling the throttle the suspension has time to adapt to the thrust being produced by the engine and allow the bike to provide more grip but is it actually faster does it just feel that way? Is there any benefits like better fuel consumption ect?

[B5234FT]

[Rogerborg]

Matches my understanding. At low RPM and large openings you'll get lower velocity airflow though the throttle body. In a carb the fuel takes a moment to catch up, thus the addition of an accelerator pump to actively dump fuel into the air. An injection engine with a throttle position sensor can also spooge more fuel in, but neither system is going to keep it bang on if you're rapidly changing the throttle position.

Blip a throttle from idle on a carb without an accelerator pump (hello Amal Concentric) and you can stall out your engine as it takes a big gulp of nothing.

If anyone's got a more scientological explanation, I'm sitting comfortably.
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GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[TheArchitect]

I agree, rolling on the throttle does make my bike feel like it's accelerating quicker than WOT.

Either that or it's a false impression. A very non-scientific explanation below..

So when you go WOT, you consciously do it and hence you brace yourself harder to counter the pull of the acceleration. But when you roll on the throttle gradually, you're not expecting that much acceleration because you don't think it's there, therefore you end up feeling more pull on your body from the acceleration because you haven't braced yourself as much. So the increased acceleration you feel could just be a result of you not being ready for it.

Does I making senses?
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GSXR 600 K6 - Stolen
GSXR 600 K6 - Stolen
MT09 - Almost stolen

[Silver_Fox]

It makes sense but I don't think it's correct
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CBR600 F3 FV
CG125

[Ariel Badger]

My throttle is fully open within a half a second of leaving the line, I am getting 60ft times of 2.6 seconds so something is working well.
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[Albigularis]

The easiest way to check the theory is get the bike in 5th gear, 30mph, pull the throttle open and see how strong it gets whilst winding it further back. I know the Multistrada gets stronger the further you pull it back, and all racers you watch, dyno operators etc all get the throttle as far back as they can...

[techathy]

If you snap the throttle open the engine will be a little behind what you're expecting - instant full power. This will make you think you're not accelerating as quickly. If you feed the throttle in you'll be expecting a liner response but what you'll actually get is maybe 60-70% maximum acceleration from 50% throttle, so the engine will be a bit ahead of your expectations. This will colour your perception and make you think you're accelerating faster.

[Ariel Badger]

Ignoring what the Muppet said.... I should have a 3 plain acceleration data logger in the next couple of weeks and will take some readings at different throttle settings.
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[sickpup]

All depends on the carbs, way too many variables to make a generalisation.

Flat slides may bog whereas CV's wont as they need matching to the engine speed.
Fit a set of 36mm CV's to a GSXR1100M and snapping the throttle open it will accelerate VERY quickly, refit the original 40MM CV's and do the same it will accelerate slower, all down to air speed through the carbs.

[Kaya75]

Too many holes in original question..

Is the op talking stationary, tick over, 2 k rpm to redline or 6 k to red? In which gear?

If I'm at 2k in 5th, I can go WOT, and I'll exponentially increase acceleration to peak but it'll be easy going until I get past 6k, but if I'm sitting at 6k in 2nd Awaiting a overtake opportunity and a go WOT I'll get more G then if i control the roll.. But then I'm on a bandit 600, could you actually go WOT in second gear sitting just below the powerband range on a R1 and keep the wheel down? I really don't know..

But stands to reason if I set off WOT in third gear, acceleration is gonna be slower then if I roll on quick like while in 1st gear - or am I talking bollox? Again I'm not too sure
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ybr125 Sold, GSF600 K1 Bandit (For Sale), FJR13000 gen2.

[Wonko The Sane]

I know when I had restrictors in my ZZR it could be a bit asthmatic if I opened the throttle too quickly compared with now
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[G]

[spottedtango]

See I didn't realise that the type of carburators was important hence why my original answer was quite vague. I had the general idea that all carburators acted similarly when the throttle was opened even though some of them are constructed differently.

[talkToTheHat]

[Rogerborg]

[Silver_Fox]

I have a slight lag when I pin the CBR. I just assumed the carbs were gummed up a tad
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CBR600 F3 FV
CG125

[techathy]

[Ariel Badger]

[quote="techathy"]

[Kaya75]

[Nobby the Bastard]