ATC 110 bogging/carb ? help

[akpepperdog]

New to the forum here......
Thanks in advance for any help. I read through carb tuning 101 - lots of great info. and searched as best I could for help. If there is a thread that is related please let me know as well.

background:
-bought a 82 ATC 110 at an auction cuz I always wanted one for moose hunting
-looks like it sat in the rain for years
-it was siezed and the tranny had issues
-had seats resurfaced and had new valves installed
-had bored cylinder, new piston, rings etc
-rebuilt carb. soaked for days. used compressed air, needles, small wires etc to make all is clear.
-cleaned rust out of tank
-petcock filter clean and clear
-replaced fuel hose (*) I used fuel injection hose which is not round in shape and may be restrincting ?
- fixed shifter star and added missing shifter pins - works great.

problem:

-bogs past 1/2 throttle

-it only runs past 1/2 throttle with choke on, even just a little choke- IF AIR CLEANER BOX INSTALLED (no element)
-if no air cleaner box installed, runs full throttle.-idles fine either way

- plug was black after a few minutes of running either way above


(I was thinking it was a lean condition)


I have tried
- monkeying with float level - no change
- moving needle clip up or down - no change
- recleaned carb and all orifices at least 5 times
- pilot screw adjustments make no difference
- valve clearance good

Thoughts:
- Exhaust pipe clogged or restriced - seems good to me when air blown through it
- fuel hose restricting flow - but (with petcock removed from carb fuel flows freely on both reserve an on positions
- carb has internal corrosion or pits I cant see
- ?????

Any ideas would be appreciated.

Thanks,
Matt

[litebulblsc]

The exhaust is probably restricted.

[akpepperdog]

I tried it without the exhaust and no change so I don't think it is an exhaust restriction.

come on with the ideas!

[daniel_250r]

its running way too rich it runs right without the air box because its starving for air, i would check if the intake on the frame is clear

[akpepperdog]

Thanks for the responses so far!

It is not the intake o the frame.

The air box is hooked up but no element and the box is not hooked up to the tube that goes through the frame. I thought it might be picking up breather air and tried it with the box inlet pointing away from the frame. No change.

Thanks again

[Pafrig]

check ignition timing/air filter. also make sure ALL passages in the carb are CLEAN. especcialy the main jet. I restored a 200 last summer, the carb bowl had a inch of aluminum rust sitting in the bottom. drove my self crazy getting it clean/patched.

[mohadib]

sounds like its running rich to me. i dont quiet understand why you can run above 1/2 throttle good as long the choke on. That usually means lean. But if it runs better without the airbox, that seems to imply rich. Good Luck.