Jerky acceleration

[Feasty]

I'm loving my Aprilia Caponord, but one thing I'm struggling with is how jerky the throttle is. I have to do a lot of clutch balancing at slower speeds in traffic to keep it from jerking forwards when rolling on the accelerator.
I've tried adjusting the throttle cable and tightened the chain, but it makes no difference. If the clutch lever is out in 1st or 2nd and I'm slowly rolling along, then slowly twist the accelerator, it'll initially have no effect, then the revs will suddenly kick in and the bike jerks forwards.

Is there anything I'm missing in how to set it up? Or an accessory I can buy to make the acceleration come on more smoothly?
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Previous: Aprilia Habana Retro 50cc (beauty), Yamaha SR125 (fell apart), Honda XR125 (nippy little commuter), Honda SLR650 (Geewhizz), Yamaha Diversion 900S (Smoooooth) written off courtesy of a stupid escaped horse.
(7 year gap), BMW F650 (Relaxing ride). Aprilia Caponord ETV1000 (Big and bold). Yamaha FZS600 (got me in trouble too quick!).
Current: Yamaha TDM 900 (Comfy, light but big, power when needed).

[doggone]

Since you balance the throttle setting against centrifugal force when cornering it sounds a bit worrying, assuming you don't mean a single surge like power band effect.
Maybe the throttle cable needs lubricating or is not routed correctly after maintenance i.e. bends are too tight.
You could check what's happening when you let it snap back.
Assuming it has a cable

[Evil Hans]

Just found this:

https://www.rsrmoto.com/boosterplug-for-aprilia-1200-caponord-all-models/

Seems to cover your issues...

EDIT: Just noticed you have a 1000 and that's for a 1200
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Triumph Sprint ST 1050. And it's Red.

[Feasty]

Evil Hans that's great! Shame it's for a 1200 but that covers exactly the issues I have, I'll do some Googling on 'booster plugs' now for the 1000.

(Why the hell 'Booster Plug', surely it should be called a 'Booster Stop Plug'!)


doggone - I do find the bike difficult to corner at slow speeds, especially in hilly Sheffield! I've found myself revving higher and using the clutch to balance it more instead when setting off, but on previous bikes it's just been a case of rolling on/off the throttle.
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Previous: Aprilia Habana Retro 50cc (beauty), Yamaha SR125 (fell apart), Honda XR125 (nippy little commuter), Honda SLR650 (Geewhizz), Yamaha Diversion 900S (Smoooooth) written off courtesy of a stupid escaped horse.
(7 year gap), BMW F650 (Relaxing ride). Aprilia Caponord ETV1000 (Big and bold). Yamaha FZS600 (got me in trouble too quick!).
Current: Yamaha TDM 900 (Comfy, light but big, power when needed).

[xX-Alex-Xx]

[trevor saxe-coburg-gotha]

AP Workshops know a LOT about Aprilia bikes (although probably more about the sportier models). Their YouTube channel (of the same name) is always good - it's a video round-up of what they do in their actual business. They seem like very knowledgeable, approachable and helpful people. I appreciate you're in Sheffield (?), and they're over in the Midlands, but they could still be potentially helpful. If you want to contacting them try their website:

https://www.apworkshops.co.uk/
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"Life is a sexually transmitted disease and the mortality rate is one hundred percent."

Mobylette Type 50 ---> Raleigh Grifter ---> Neval Minsk 125

[MCN]

You already have a throttle dampner.

It's called your right pinky finger.

You squeeze the bar end with your pinky as you roll on the power.
Jerky is sometimes user input. The jerk working the controls.
When you feed in power the bike moves forwards and your mass stays where it is.
So to wind power in smoothly you need to dampen the throttle input.
(Unless you're trying to beat a London cab/Bojo-Bike off the line at the lights when you have to give it all at once.)
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.