help my brothers sick 1100gs please..!

  • Thread starter Thread starter ericmcn
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ericmcn

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Hello folks

newbie here,

I registered in the hope of getting advice on my brothers (very sick) 1997 R1100GS.
he is taking it for a roadie in 2 weeks and told me help out, (he is computer illerate...:thumb)

so the story goes ..

the bike is burning fuel like crazy.
he needs to adjust the TPS 'and' set the Co2 mixture to its correct setting?

he has some details to adjust the TPS so that should be ok, but he is a bit lost on the o/2 levels.

BTW, he is a mechanic so no worries there...

he was half thinking of ordering a new TPS, as he has not got much time and cant have the bike break down in the middle of no where...lol.

can anyone here clarify exactly what needs to be done, in layman terms...!

many thanks.:aidan
 
For an 1100 you want to try and set the CO reading to approx 1.5 to 2.25 percent (the gauges on the analysers show this)

The adjustment is made via a CO potentiometer (a variable resistance) I think it's on the left side above the riders peg it's a small black box with a "tube" pointing down. mounted on an anti vibration rubber

Turning the big brass screw inside will adjust the mixture BUT you must go out for a 20 minute run on the bike so it's thoroughly warmed up
 
Oooops 1997 it could have a Lamda probe in the exhaust !! then my last post is incorrect!

Kneel down and look at the exhaust area at the front of the can around the centre stand area

Is there a metal thing screwed in the exhaust? Yes then the engine controls it's own mixture

However on looking back what has he done to check things out before he goes straight to technical things

FOr example is the air intake restricted? BIrd stuffed up the pipe? Filter boggin?

Eric whereabouts are you in Ireland? Usually there's a tosser(<<< Nickname for a GSer) nearby that is willing to Help

As you can see I'm up in Co. Antrim
 
Thanks lads

He needs to or is trying to adjust the emissions, as they are all over the place. He hooked up them emission tester things up the exhaust and they were all over the shop.

He got hold of that gadget (no idea what its called!) under the seat, to try and set the emissions at a right level, but it did not do anything so it seems.

I dont think there is any other mechanical issues with the bike, just this.

He said he needs to adjust the o2 levels and set the tps, or at least check its voltage with a dvm.


I have that oil head manual and he will check it out this evening.

is there an article in the oil head manual on o2 levels?
 
umm, he told me a min ago there is no cat or lambda sensor on it...

so Jay

is this still relevant?

thanks

"For an 1100 you want to try and set the CO reading to approx 1.5 to 2.25 percent (the gauges on the analysers show this)

The adjustment is made via a CO potentiometer (a variable resistance) I think it's on the left side above the riders peg it's a small black box with a "tube" pointing down. mounted on an anti vibration rubber

Turning the big brass screw inside will adjust the mixture BUT you must go out for a 20 minute run on the bike so it's thoroughly warmed up "
 
Yes Eric thats relevant BUT make are that he has the cables for the butterflies synchronised (i.e. both start opening the butterflies at the same time not one before the other) Do NOT adjust the left cable just the right hand one or he'll have to set the black box on that side Called a Throttle positioin sensor!

The Big Brass screws on the outer sides of the throttle bodies are the idle screws and should be taken out and cleaned and then the idle when hot should be set to 1100 to 1150 rpm using these. And importantly a clean unobstructed airway except the airfilter of course

Only THEN after all that is done check the CO readings and adjust the screw a maximum of 1/2 a turn and give it time to settle before screwing away again!:thumb

So where were you you haven't said
 
In Kerry.

My brother is going to shetlands soon...stag lol :beer:

Bikers huh...
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
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