Is this normal after jetkit install

[vmax]

Hi all,

Short story. After installing FP jetkit needles, my bike running just great, but when I pull the spark plug, I notice the right is rich (black) and left side is lean (llittle white). I set the screw mixture equal 2,5. I am looking the answer over internet but cannot find my answer. So my question is...."Is this normal after replace stock needles with jetkit needles (whatever brand is)?". Cause this needles from what I am reading always set both secrew mixture equal (different with stock needles).
This is what I do after installing kit :
- Sync carb
- New spark plug

Appreciated your info

[tubarney]

Check to make sure the boot at the top of the carb is not pinched and is installed properly.

[DaBlue1]

Originally Posted by vmax

Hi all,

Short story. After installing FP jetkit needles, my bike running just great, but when I pull the spark plug, I notice the right is rich (black) and left side is lean (llittle white). I set the screw mixture equal 2,5. I am looking the answer over internet but cannot find my answer. So my question is...."Is this normal after replace stock needles with jetkit needles (whatever brand is)?". Cause this needles from what I am reading always set both secrew mixture equal (different with stock needles).
This is what I do after installing kit :
- Sync carb
- New spark plug

Appreciated your info

Are the plugs new or were they installed previously?
How are you inspecting them?

[vmax]

First I clean the old spark plug the I ride my bike for a few days, then I pulled spark plug to see the colour, and I find the ride side is black (rich). Now I used new spark plug and ride side still rich.

Originally Posted by DaBlue1

Are the plugs new or were they installed previously?
How are you inspecting them?

[DaBlue1]

Originally Posted by vmax

First I clean the old spark plug the I ride my bike for a few days, then I pulled spark plug to see the colour, and I find the ride side is black (rich). Now I used new spark plug and ride side still rich.

The new needles you put in, mainly affect 1/4-3/4 throttle openings. If the bike runs great, you probably don't have a major problem. Normal spark plug color has a wide range.
If you haven't already, you may want to check for air leaks and synch the carbs.

Are you just looking at the tips of the plug or are you doing a proper plug chop?

[Jred]

Could be an air leak - spray wd 40 near the boots and air box and see if there is any change.