Probably fine as is. If you want to play, you can start with a warmed up engine and preferably a new or very clean plug. Stick your plug wrench in your pocket. Ride the bike at 1/2 throttle for at least 2 minutes (longer is better) without changing the throttle position at all. Now, simultaneously pull in the clutch and kill the engine and stop. Do not let the engine run at any other speed or your test result will be affected. Pull the plug and read the insulator color. Chocolate brown is good. Grey or white is lean, black and sooty is too rich.So I'm not rich or lean.... I get about 90 to 100 miles per gallon. My tank is almost half a gallon. Does it matter? I'd think richer would be a gas hog....I have the basic carburetor. Roughly 40 to 50 miles per tank.
My engine sounds great and that muffler is just so freaking loud. I swear I can't even wear my earphones anymore and listen to music cuz I can't hear the music, LOL
And if I decelerate throttle just a little bit it... It'll make a pop pop pop pop pop like a Harley. LoL
But yes my pin is on the 3rd knotch of 5.
Should I raise or lower it? which is up and which is down vertically?
If it runs great as is.... Maybe leave it alone?
You are in the middle , so if it's lean, you want to raise the tapered needle out of the jet to let more fuel flow past it. To raise the needle, move the clip to a lower position, and vice versa. With the clip at the top position of the needle, the mixture will be as lean as you can get it.
But before you do this, you'd really want to get the right main jet by doing the same sort of test, but with the throttle at WOT.
Chances are it isn't too bad as is. If you aren't fouling plugs or burning up your engine, and it's running good, no big worries, but it's possible that your exhaust mod has made the engine lean out, so you may need a larger jet if you've done that recently and noticed a significant performance increase.