I just got one of these but a clone
looks the same
anyways mine only had a bowl drain line connected no other included lines
from the many pictures ive found it looks like all other nipples stay open to the air
Now to the tuning
ive tuned small carbs in the past but always stock ones
not a brand new one
and of course knew the jet sizes
I assumed since they claim its for 80cc then the jetting would be correct
I found with the air screw it would run better at 1/2 turn out
From little I know that really lean, and I think it was because when I wold go to idle it would idle very high for about 1 min, then drop very low
if I adjusted the air screw out ( im guessing rich) it would bog instantly and die
again ive used this screw on other bikes in the past and know it takes very little turns, and having to wait a few seconds between turns
I even tried the high idle trick and adjusted the air screw until it idled higher then lower
So acceleration felt very smooth, then a bump im guessing that the needle. I did try it richer but no help there.
Then full throttle I never got as fast as I did with the stock I even lost maybe 4-5 mph top speed
Now it never felt lean, because in the past if I would be lean and slowly drop the throttle a touch I would go faster. Just like my stock carb when I was jetting that for my larger filter.
But this new carb just didnt want to open up.
I could rev it on the stand and really get it screaming but on the road no luck
The micro drill bits I have arent the right sizes to drill out so I will have to order some, but in my case is this still a sign of being lean?
Anyone live at sea level and would like to tune it for me?
I dont want to give up on this carb yet but so far my stock one kicks butt