Surges

[NightCrawler]

I'm almost certain this had to come up at one point or another, but I don't remember seeing it since I have been a member.

My RPM surges from 1100 to about 1500 when I'm at a full stop. While riding its steady, only while stopped does it surge. Is that normal?

Bike:
2005, no internal mods, 1700 miles.

 

[PaceMaster]

No it is not normal for it to surge when idling. You may need to have the throttle bodies syncronized.
Or one vacum line may be disconnected.

 

[shenoyp]

Nope... not normal mate! Dunno what the problem might be, but I suggest you get it checked

 

[NightCrawler]

So do your bikes hold a steady idle? Does the needle not even bounce a bit? I'm asking this because I don't want the dealer to tell me it's normal.

Most of the time it bounces. Just recently it began to surge, but its a here and there thing. If mine bounces and yours is holding steady, at least they can't say its a normal thing to actually surge.



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[theemrrdkill]

was it a.. big cam ..option?

 

[Bergster]

when mine is cold it surges slightly. when its warm the idle is smooth and steady.

 

[omslaw]

Mine started doing that *after* I adjusted the idle from ~900 RPM to around 1200 RPM.

I'll just sit at a stoplight and after about 15 - 30 secs, it slowly rises to around 1500 - 1600. As soon as I pull in the clutch tho, it drops back down.

I was thinkin' about dropping the idle 100 RPM to see what happens...

 

[PaceMaster]

A tre will effect the way i idles- i made my own switchable.
tre on at a stop, clutch out in neutral...it uses the 5th gear map---pull in the clutch and the clutch sw. will set it to the stock neutral map . with the tre off it idles at 1100 kinda sounds bing bing bing easy going sound..turn the tre on and drops a 100 rpm and sounds deeper growl but still steady..
once i put the muzzy on it idled better. This data is with the pipe on it.