LH weaker than RH?

[Guest Nigelstephens]

I have noticed more vibration under load recently on my Sport 1100 I and then after a long time idleing while balancing the throttle bodies, I noticed the LH header pipe was a very dark colour.

 

The RH was not as dark. Then I noticed a difference in the plugs. The RH one was more sooty.

 

I have checked the valve clearances to Euro spec and they are okay. I have the original air filter housing with a K&N filter. I have the original box with ARM mufflers.

 

I also have the MY16M with wide-bandO2 in the RH exhaust. The only thing I can think of is a difference in the fuel pressure between sides (filter is newish) or the injectors are at fault.

 

Any ideas?

[Cliff]

Did you check that you bypass screws are turned out equally before balancing.

 

Balancing is done at 2000-3000 rpm not idle.

[Guest Nigelstephens]

Thanks Cliff. My sentance was misleading.

I have done the balancing using several well documented methods. The one I used was to set the the linkage at 2500 (with bleeds screwed in) and then the idle by setting the bleeds.

At idle the bleeds are approx 1/2 out each.

 

Do you have a version of the MY16M software that allows for adjustment of the injector timing between cylinders?