Rough idling

[tony d]

My 2015 Vstrom 1000 has started to rough idle sometimes stalls when pulling away?

[Gert]

What is the mileage? Was any work done to the bike leading up to this fault?
If it was a 1st gen V-Strom, I would have said that it would likely be a failing TPS... However with your model having low idle rpm assist as well, there could be other factors in play...
1) Low idle rpm assist: As most riders with this feature knows, when you start letting out the clutch, just as it begins to grab, the rpms get a boost. If you dump the clutch it'll die. But feathering it out will allow you to take off with no twist of the right hand.  The question is this fuction working?
2) a failing TPS: Have you checked the TPS C00 - rpm setting and voltage change as the throttle is opened? Keep in mind that a cold TPS can pass the tests yet fail when warm. Have a look at https://themotorguy.com/how-can-I-identify-a-faulty-throttle-position-sensor-in-my-bike/ for an understanding of the TPS fuction.

[tony d]

Have replaced f fuel filter spark plugs tps line is in middle position when in service mode bike has done 74000 miles tried tbs one side has massive vacuum was not able to adjust

[Gert]

My knowledge isa bit limited wrt your model, but I'm wiling to learn more, as reserve knowledge.
Going by what I have read, on both this site and the StromTrooper website, you would  require a tool like either an OBD2, SDS or similar to undertake certain tume-up adjustments on your model. At minimum, you need an SDS to undertake a Throttle Body Sync, to lock the ISC valve.  You could perhaps google Healtech to see what is on offer.

[Pete O Tube]

Having owned a gen1 1000 and sync'd the throttle bodies, I'm sure there isn't and Idle Speed Control valve on this model.
With a large vacuum discrepancy I'd be looking at the induction side first for anything obvious e.g. airbox not located on one of the throttle bodies securely (a known issue on gen 1 Vee's).

[Rixington43]

Is 2015 (L5) not Gen2?
I think the Gen2 does need the software tool to set throttle bodies.

[Pete O Tube]

@Rixington43, you're right, I was getting mixed up with another Vee question.
Yes, for gen 2 the ISC needs locking for throttle body sync check/adjust.
The Healtech software is a free download (I've had a look at its functions) but the hardware interface is required, which costs.
My gen 2 isn't yet at the mileage yet for throttle body sync but I intend to buy the Healtech kit (about £140ish).

[purplebikeunicorn]

Just a warning, the newer Healtech software detects and destroys clone interfaces (if you were ever to consider buying one of the "Chinese clones").

[porter]

Awhile ago here someone had a vacuum pipe split on a Gen2 which caused an uneven tickover, something to check.
  Before I knew any better I balanced the throttle body's on my 2014 model the old fashioned way, it's got the adjuster screws etc so I thought it adjusted like any other bike I'd  had. Now there wasn't much in it but all worked fine for me, lucky maybe, I don't know.

[Pete O Tube]

@purplebikeunicorn I'd only consider the genuine Healtech for support and software updates