Lumpy Idle

[T_B R1]

OK, I just finished installing a pair of Leo vinci slip-ons and Akro Y-pipe yesterday. I had the graves slip-on map set on the PC3 and found it idled really lumpy (basically going between about 1100rpm to 1300rpm). So tonight I put a new map on which I got from the powercommander site for the akro slipons and y-pipe because its the closest I could get to what I had and it still idles really lumpy. According to the PC going from ~1090rpm to ~1370rpm. Its ok when riding its just at idle

So question is...Apart from going and getting it dyno'd is there anything you'd suggest. The O2 sensor is still connected.

[XSorXpire]

Buy another bike?

[T_B R1]

Jealous Neil???
Thanks for the help though

[XSorXpire]

Yes, i am pining for a big bike that idles rough.
Wish i had one of those.....

[Arwon]

Neils just upset his garage only likes to eat Krapasakis.

Is this when you first start the bike because the choke cycle always comes in on startup, how long are you running it for before checking the idle situation.

I know this sounds simple but how clean is the air filter, with the computer control idle that could cause issues and is the O2 sensor unplugged, that will help things.

[T_B R1]

Its after its warmed up. if I've been riding for 5min or so, after the auto choke lets the revs go back to "normal"

I'll have a look at the air filter, wasn't serviced too long ago so should be ok but I'll check it out.

The O2 sensor is plugged in and screwed into the t-pipe.

[XSorXpire]

Buy a set of carbs and instal?

[T_B R1]

OK, seems like the O2 sensor needs to go. Just gotta figure out how to do that when I get home.

[XSorXpire]

Hacksaw.

[T_B R1]

Are you stalking my thread Neil? Should I be afraid? I've heard stories...
Or is it you just secretly want a yamaha??? hmmmm?

[XSorXpire]

I'm offering help.
YOu can borrow my hacksaw, a file, some sand paper and a pair of pliers if you like?

[TORQ]

OK, seems like the O2 sensor needs to go. Just gotta figure out how to do that when I get home.

Easy as, one 2-wire lead, just under the fuel tank. DynoJet recommend you disconnect the O2 sensor. Can then either remove the sensor completely and put a bung in it if you have one, or just leave it sitting in there, no drama's. A bit of lump sounds good too, as arwon mentioned, esp when they're on choke. Sounds hawt.

* Reminds self to do something about stock exhaust now ...

[Arwon]

OK, seems like the O2 sensor needs to go. Just gotta figure out how to do that when I get home.

always a good place to start

[T_B R1]

Sweet as, Thanks Torq. bastard can stay there for now (saves me pulling off the lower fairing again.

[BlackICE]

Buy my Gillies trist and it will solve your problems... hmmm how I dont know, but you know you want them...

[Davey]

The best advice i can give is to do a wheelie.

[T_B R1]

Buy my Gillies trist and it will solve your problems... hmmm how I dont know, but you know you want them...

Buy your what now? and have you still got those spare rims? will they fit the '07?

The best advice i can give is to do a wheelie.

Oh, it does that nicely even with a lumpy idle.

[Arwon]

Rims will fit but the disks won't ....

[T_B R1]

Bugger.

Well disconnected the O2 sensor and still does the same thing. Tried it with 2 maps and both do it. The full system leo map is worse. Akro with y pipe is the best but still varies a good 200 rpm

[TORQ]

You don't have a leak in there somewhere do you ? Maybe just go over all the piping to ensure everything is nice and snug, also check all your hoses etc up around/under the fuel tank and so forth. Random thought, but just in case something is a smidge off or pinched or vac leak etc. I lost two nuts off one of the header flanges once and it caused the bike to sound/perform rather wierdly as it was leaking; at idle sounded a bit crappy but opening it up it tidied up.