V11 misfire around 2000 rpm, or in need of mapping?

[fastaussie]

i have a 2002 V11 Le Mans.  it has an aftermarket crossover pipe and stock mufflers.  if i hold the throttle steady around 2000 rpm in neutral, it hiccups and drops 500 rpm.  then it will climb back to 2000 and a few seconds later, do it again.  any ideas?

i am the second owner, it has 3,700 miles on the odometer and is super clean, like new.  it came with a Power Commander which i haven't messed with or unplugged yet.  it also surges heavily under 4000 rpm.  in that rpm range in any gear, it either wants to accelerate or decelerate.  any ideas?  anyone have a similar issue?

Edited Sunday at 05:31 PM by fastaussie

[Pressureangle]

Rut Roh

the Demon raises it's ugly head again.

I think Power Commanders are universally despised by anyone not selling them. 

Before any root cause can be determined, a thorough precision tune-up is mandated. 

Also, both my '97 1100 Sport-i and my 2000 V11 Sport had a large differential in the injectors. After a quarter century, they need serviced.

https://www.injectorrx.com/

 

Edited Sunday at 05:48 PM by Pressureangle

[fastaussie]

29 minutes ago, Pressureangle said:

I think Power Commanders are universally despised by anyone not selling them. 

that's the first thing i plan to do, unplug that thing and see if the problem persists...

[audiomick]

3 hours ago, fastaussie said:

that's the first thing i plan to do, unplug that thing and see if the problem persists...

Very good. Get it back to where Luigi thought it should work, and take it from there. 

Bear in mind that the timing sensor is a known weak point. I think, by that mileage, that it probably isn't due yet, but it might be. 

Also, the rubber intake manifolds may be questionable due the the age of the bike (not the mileage).

 

EDIT: messing around with the map is the last thing on the list. Make sure everything else is ok, i.e. how Luigi thought it should work, before you delve into the map. Otherwise you might end up changing the map to cover up a fault that has an entirely different, possibly simple and easily mechanically fixed, cause. Decent tune-up and all that....

Edited Sunday at 10:14 PM by audiomick