New to the board
Arm chair racerNew to the board
New to ATC ownership.
Have a 1983 Honda ATC200E
Rides fine, but idles low and dies unless I (constantly) throttle up a bit.
The person I purchased it from says it's because it needs a new air filter. I'm dubious as when I remove the air filter it still won't idle and quits.
Don't wanna mess it up - so asking for advice as to what I should do, exactly?
Power User
The day begins with 3WW
A carburetor cleaning and tuning should correct the issue .
78 atc 90/180cc Dickson Full Suspension
76 ATC90/180cc Nicholson
77 atc 90 Dickson Full Suspension
84 KLT 110/123cc Powroll Racer from 80s
87 atc 125m stock
84 atc 200x Curtis Sparks
84 atc 200x Powroll My race bike from 80's
83 atc70/108cc Powroll blue Xmas Special
81 atc185s HP-ATC full suspension
Performance Shop is Open PM me for Service
My Feedback http://www.3wheelerworld.com/showthr...ck+shortline10
New to the board
Arm chair racerNew to the board
Idle speed of engine at operating temp (after 10 mins of riding or running engine in neutral with big box fan blowing at it from front) should be 1400 +/- 100 RPM
idle speed adj screw is oriented horizontally on right side of carb
Initial pilot mixture screw setting is 1 & 7/8ths turns out from carefully screwed all the way in until it gently seats
Pilot mixture screw is oriented vertically (screws up into carb) on front side of carb and its head is knurled
Another thought - How's the gas flow out of the gas line hose downstream of the tank's petcock valve ? Sufficient ?
Have you ever checked and or cleaned the fine mesh filter screen tube on the topside of the petcock valve within your gas tank ?
You should be able to get a decent look at it with a bright flashlight thru the filler opening...
Last edited by SchWarZHorsE; 02-12-2025 at 11:21 PM.
83 BIG RED
New to the board
Arm chair racerNew to the board
Thank!
I'll try all of that tomorrow
Power User
Roostin Away
Or a air leak at carb mount to head.
If its on the internet its got to be true they can't put any lie's on the internet
Just Too Addicted: Protecting Our Community
The day begins with 3WW
What he saidOriginally Posted by shortline10
Liberalism suspends the intellect of its victims, while at the same time tricking them into believing that they're smarter than everyone else.
If we've done business together, please leave me feedback. Thank You!:
http://www.3wheelerworld.com/showthr...t=Scootertrash
New to the board
Arm chair racerNew to the board
It runs great when it warms up after three minutes. It's just annoying...
First Time Rider
Arm chair racerNew to the board
It's kind of normal for machines to not run "great" until they are warmed up - that's why they have a choke. If you pull the choke, it should idle fine when cold. Once warmed up, release the choke.
As others have already said though, it may just need a good ole' fashioned carb clean and idle adjustment.
Proud Owner of:
1986 400ex Frankentrike
1986 Honda ATC 350x
1987 Honda Big Red 250ES
New to the board
Arm chair racerNew to the board
Mine doesn't seem to have the fuel mixture screw. Only an idle adjustment screw.
Is it tiny and hidden or something?
First Time Rider
Arm chair racerNew to the board
The service manual calls it a pilot screw and says the proper initial adjustment (good starting point) is to tighten it until it gently seats and then back it out 1 and 7/8 turns.
You can find the service manual here: http://www.oscarmayer.net/atc/manual...00e_bigred.pdf
The carb adjustment is section 4 of the manual.
Proud Owner of:
1986 400ex Frankentrike
1986 Honda ATC 350x
1987 Honda Big Red 250ES
New to the board
Arm chair racerNew to the board
These pictures are VERY helpful. The pictures in my manual of the mixture screw are of very poor quality. Now I can locate the screw!
THANKS!
Power User
Catch me if you can
That's your air screw, it's the fine tuning adjustment for your pilot jet.
That screw is lightly bottomed, then turned out to the spec in the manual.
Like Shortline said, you have to do a complete tune up and you'll probably be good.
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country
Got The Holeshot
Arm chair racerJust too addicted
X3 carb clean,pilot jet!
80' Honda CR80R
78' Honda XR75
77' Honda CT-70
74' Honda CT-70
75' Yamaha GT80 Enduro
76' Kawasaki KZ900
73' Kawasaki H1-500
76' Kawasaki H1-500
They always run best before they blow!
Manuals: http://www.oscarmayer.net/atc/manuals/
New to the board
Arm chair racerNew to the board
I don't understand what you mean by "X3 carb clean,pilot jet"
Please elaborate...
Power User
Got the holeshot
That screw in front of the float bowl is a fuel screw, not air. Just to be clear.
Generally, four cycle engine carbs have fuel screws and two cycle engine carbs have air screws. Really small four cycle carbs, like on 50cc engines, often have air screws instead of fuel.
A way to tell is air screws are usually on the intake side of the carb, before the slide. Fuel screws are usually on the engine side of the carb, after the slide. Air screws are typically on the side of the carb.
They provide similar functions, but work opposite. An air screw is turned in to richen the mixture where the same with a fuel screw leans it out. The idle circuit feeds from the pilot circuit, and changes to the pilot jet will affect the fuel screw adjustment, that's a good way to tell if the pilot is the wrong size. Less than a turn out on the fuel screw and the pilot is likely too large. Getting towards three turns out and the pilot is likely too small. The fuel screw is for fine tuning at idle, and if the idle is too high it won't adjust properly because the pilot jet is coming into effect, bleeding in extra fuel and overriding the fine adjustment of the fuel screw.
Not trying to over-complicate it, but understanding the function of each helps out.
The story of three wheels and a man...
Reply With Quote
