Can running lean damage my bike?

Will that adjust all cylinder mixtures?

It appears that only two of them are running lean.

 

No.
Each Carb has its own Mixture Screw.
The Mixture Screws need to be > Tweaked < Not turned.
The Mixture can be changed very dramatically within an adjustment to the Mixture Screw the width of a Nickel.
Once the "Sweet Spot" is found a "Quarter Turn" could move you from too Lean through just right to too Rich.

Adjust each Carb individually.
If adjustments to the Pilot Screws do not solve the Mixture problem
Check:
Sync
Diaphragm Pistons Sticking

 

Thank you for the help.

I just got the bike this past fall. I was hoping to avoid pulling the carbs until winter. Since I wanted to ride so bad. The bike started well, but didn't idle well at first, and didn't have much power.

I ran some seafoam through it, and it started to idle consistently....but still lacked any real power. It sure takes off if I bump up the enrichment circuit (choke) though. Wow.

I checked the pulls after chopping them at idle, with enrichment on....since it wasn't idling cold. 1 & 3 were lean. Not completely white, but close.

Couldn't trust that......so I took it out for a spin, hammered up to my driveway, then cut it.......must have gotten up to 4k-4.5k RPM before I cut it.

1&3 were still a bit lean (tweaked those)......2 was grayish and 4 was sooty.

So that's where I sit until I can tweak a little more or winter comes for complete carb overhaul.

 

Ouch.

I just did a plug chop at about 5k under load......
plugs 1 & 3 are white with brown specs.
4 is sooty and was wet.
2 was white.

When I chopped them at idle, 2 & 4 were dark......4 being black.
1 was light brown, and 3 was white.

I cannot wait until I can work on this thing!