Fueling problem. RH Cylinder.

[Stuttgartmetal]

The bike runs like a pig under 2500rpm.
Above that its fine.
It runs lean on the r/h cylinder.

Its just been balanced , and when carbcleaner squirted down the air intake, it runs like a different bike.
Changing the injector from another bike made no difference.

Where do I start?

Throttle bdy test?

Its a 51 plate 1150GS
48,200 miles

Can't see it being coils, but could it be this?

Fuel pump?
Pressure regulator?

Im stumped.

 

[Stuttgartmetal]

Could the fuel pump be failing

 

[Stuttgartmetal]

Oxygen Sensor?

 

[MikeO]

Is the rubber cover for the balance tube present/ in good condition?

 

[DrFarkoff]

Do a compression test

 

[Steptoe]

It runs lean on the r/h cylinder.

How have you reached this conclusion ?

 

[Stuttgartmetal]

Because the spark plug is white

 

[Smug]

Squirting carb cleaner at the right hand induction area to check for a leak which would make it run lean.

 

[Bendy toy]

Failing coils do this and make the wonky side appear to run rich.
An air leak behind the throttle body can mess up fuelling. Test by sparing with carb cleaner. If engine revs you have a vacuum leak.

 

[Stuttgartmetal]

Compression, and lack of left side.

 

[Big Derek]

Don't know what its called its like a black rubber nipple off a babies bottle. But whilst having a ride up to Aj's the other day with a mate to get his New GSA 6k serviced right outside Jefferies my bike a 2014 GS R1200ADV went pop, fart, bang and would not keep running it kept starting and popping and cutting out. I left it with them and borrowed a demo bike for a ride out. When i came back they said it was down on comp on right cylinder....? after everything they couldn't find the fault, Then they noticed this black rubber nipple do da thingie on the top right cylinder that is held there via vacuum? was missing so they fitted another and hey presto! bike "OLIVE" She was back to normal. I don't know why the rubber had come off? Later after thinking about it I walked down the road only 100yds from Jefferies to where "Olive" first coughed and spluttered and found the Rubber Nipple in the middle of the road! CSI or what I took it and gave it to service. So I will always be checking that little sod from know on. Midst you had 4 other GSA's and sure they have all had them never a problem.So why it came off who the Fook knows!

Maybe check your Nipple is seated good.....

Big D

 

[Stuttgartmetal]

I am no further forward with this.
Despite it going to a so called expert, who has had it for two weeks, he says, and I quote
"Ive never had a bike this hard to fix"
Personally, I think the blokes too fick.
Fuel pressure is down one side, but he says he's tried the fuel pump, and it makes no difference.

Should I actually pay him to not fix my bike.
I don't want to hand over a bean

 

[Stuttgartmetal]

Ive had so many conflicting reports from the mech.

 

[DrFarkoff]

Fuel pressure is down one side

BOLLOX! It's not a split system its a common feed to a regulator and splits to the two injectors after that!!!!

If one side is down the other is down too!!

Get it to Feck out of there and go somewhere that actually knows what the feck they are doing!

An Injector may be sticking or have a bad pattern or a broken wire but low fuel pressure on one side needs a boot in the arse!

 

[Oldie]

I had a problem with intermittent firing of the r/h cylinder of my 1100GS which I traced back to a broken connection on the lead which attaches to the injector. Pull back the rubber boot and see if the two wires are in good condition - they were brittle on mine. Spares can be ordered although I have one somewhere.