[Oregon1wd]

Hello all,
I have an 2006 dl650 and have done most of the work and maintenance on the bike myself.
I recently have noticed that the rpms in a non loaded condition, are really jumping at like 2000 - 3500 rpms. I can hold the throttle still in my hand and it just does what it wants jumping around. There are 6000 miles on the bike. I have checked the play in the throttle cable, and it is in the range of the manual.

Any suggestions, or is this common.

Thanks in advance.

 

[Yak]

Not common, nor is it normal. do the RPMs sound steady or are they jumping around as well, or is it just the Tach that is not picking up the accurate RPM reading?

 

[Oregon1wd]

The sound carries with the tack as well.
Everything seems to run smoother at higher rpms, once over 4k.
I am wondering if their is too much play in the cable, and I measured it wrong. The measuring system the manual states seems there could be some error. Would this be a symptom of too much play in the cable?

Would this be a symptom of a throttle body problem.

 

[Improperly Torqued]

My first guess would be a worn or improperly seated throttle boot, letting air sneak by. Aging of the rubber would be accelerated by exposure to harsh weather, but will happen anyway.

 

[Sam4938]

My first guess would be a worn or improperly seated throttle boot, letting air sneak by. Aging of the rubber would be accelerated by exposure to harsh weather, but will happen anyway.

What this guy says or your throttle body is out of adjustment. (not the cables)

 

[kick]

Sounds like a vacuum leak or as has been mentioned a throttle body synch is in order. A vacuum leak check will require removal of the tank and airbox.

 

[Oregon1wd]

Thanks guys, I will look into the Throttle Body sync, as that should be in order anyways.

 

[Improperly Torqued]

Thanks guys, I will look into the Throttle Body sync, as that should be in order anyways.

It should be pretty trivial to check for vacuum leaks at the same time. You might consider doing both at once.

 

[Firefly]

My 06 does the same thing occasionally. Seems to do it a bit more when it's cold out. It's been running great recently and I haven't done a thing. Don't know if it's bad gas or the weather conditions.
Check what has been suggested and also run some injector cleaner through a tank or two.