First Time Rider
Arm chair racerNew to the board
Ok, now I am really lost. My 77 ATC 90 has fuel, in the carb, intake and cylinder, it has good spark and the ignition is timed good, the valves are timed DEAD ON and it has good compression and it WONT RUN! Even with either and gas down the cylinder!
1983 ATC 185s 200 jug bored .20 9.5:1 Naumura piston. Fast as ass when its not stretching the drive chain or stripping hubs.
1986 ATC 250ES. *Total garbage trying to sell it*
1983 YTM 200E. Runs good, forks are super bent but aside from that its mint.
1984 YTM 200L. Barn find, everything is mint except the bottom end is bad... *waiting on a new engine*
Just Too Addicted
Arm chair racerJust too addicted
Did you or someone else paint or powder coat the frame ? Check the ground wire on the frame. Make sure its clean no corrosion.
Try starting it with the gas cap off. The rest will be trial and error. Good luck man.
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At The Back Of The Pack
Arm chair racerAt the back of the pack
Is the timing 180 degrees out
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83 atc 110
77 atc 90
80 atc 110
85 200x
85 200x
87 250es
79 atc 110
1978 atc90
1985 200s
1985 atc70
1983 atc 70
Registered User
New to the board
Has it sat for a long period of time?
Registered User
New to the board
My 200x sat for 4 years and it had the same exact symptoms as yours and some a couple days ago it fired up. I just kept kicking and kicking. Try starting fluid into the back of the carb.
First Time Rider
Arm chair racerNew to the board
It was running, and yes I tried either
1983 ATC 185s 200 jug bored .20 9.5:1 Naumura piston. Fast as ass when its not stretching the drive chain or stripping hubs.
1986 ATC 250ES. *Total garbage trying to sell it*
1983 YTM 200E. Runs good, forks are super bent but aside from that its mint.
1984 YTM 200L. Barn find, everything is mint except the bottom end is bad... *waiting on a new engine*
First Time Rider
Arm chair racerNew to the board
Still not understanding the problem
1983 ATC 185s 200 jug bored .20 9.5:1 Naumura piston. Fast as ass when its not stretching the drive chain or stripping hubs.
1986 ATC 250ES. *Total garbage trying to sell it*
1983 YTM 200E. Runs good, forks are super bent but aside from that its mint.
1984 YTM 200L. Barn find, everything is mint except the bottom end is bad... *waiting on a new engine*
Power User
The day begins with 3WW
Replace the points ! Even if their showing a nice big spark they go bad .
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
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First Time Rider
Arm chair racerNew to the board
Is there a way to tell they are bad? They look straight and clean. Ill try a new plug soon, and then coil ground, and then new points if all else fails.
1983 ATC 185s 200 jug bored .20 9.5:1 Naumura piston. Fast as ass when its not stretching the drive chain or stripping hubs.
1986 ATC 250ES. *Total garbage trying to sell it*
1983 YTM 200E. Runs good, forks are super bent but aside from that its mint.
1984 YTM 200L. Barn find, everything is mint except the bottom end is bad... *waiting on a new engine*
Power User
Teaching quads a lesson
I'm not sure how much this will affect this motor, but I'm wondering if your flywheel keyway has partially sheared throwing the ignition off slightly? I have a new set of points I can sell to you for a very good price.
Trikes
1970/71 US 90 (Aquarius Blue)
1970/71 US 90 (Future Project)
1972/73 US 90 Camo Project (110 Big Bore)
1972/73 US 90 Green
1977 ATC 90 w/83 110 motor (Fugly)
1982 ATC 70
1983 ATC 70 (Ladybug)
1973 ATC 70
1965 Marketeer 3 Wheel Golf Cart with 1986 Honda 250 drivetrain
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Other
1983 Honda Z50
1978 Honda XL75
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Power User
Got the holeshot
Another thing you could try. Check your valve clearance. If there's too much clearance, your valves may not be opening far enough or not at all.
First Time Rider
Arm chair racerNew to the board
valve clearance is good, and the flywheel key is in good shape. It was running, stalled and now wont run..
1983 ATC 185s 200 jug bored .20 9.5:1 Naumura piston. Fast as ass when its not stretching the drive chain or stripping hubs.
1986 ATC 250ES. *Total garbage trying to sell it*
1983 YTM 200E. Runs good, forks are super bent but aside from that its mint.
1984 YTM 200L. Barn find, everything is mint except the bottom end is bad... *waiting on a new engine*
New to the board
Arm chair racerNew to the board
What do you call "good" compression?
First Time Rider
Arm chair racerNew to the board
I can't hold my thumb over the spark plug hole and make an air tight seal. It ran really good now it wont run again.
1983 ATC 185s 200 jug bored .20 9.5:1 Naumura piston. Fast as ass when its not stretching the drive chain or stripping hubs.
1986 ATC 250ES. *Total garbage trying to sell it*
1983 YTM 200E. Runs good, forks are super bent but aside from that its mint.
1984 YTM 200L. Barn find, everything is mint except the bottom end is bad... *waiting on a new engine*
FACT ! I have no edit button
Arm chair racerThe day begins with 3WW
.
put the bike in the shade and lay the plug on the engine head with the plug wire connected and carefully kick it over fairly fast and look at the spark.
if it is pale blue it is very ood . . i it is yellow it is weak but should still run . . if you can hardly see it, it may not have as much current as you need.
check the plug gap, it should be around .024 inches.
look at the plug color, if it is black, you should clean it.
plug color
dry black = too rich
moist black = oil and maybe too rich
white = way too lean
lite tan = good
if the gas is old and loos pale yellow, it is getting bad . . if it is fairly dark yellow it is junk.
pull the hose off the carb and let gas run into the container or around 30 seconds, if it starts to slow dramatically, your gas cap s not venting in which case you can loosen it just to test how long it will run.
if it is getting gas from the gas tank, try to start with 1/3 rd throttle and no choke . . kick t several times, if it does not run or at least pop at at all, quickly remove the plug and look at it, if it is dry, it is not getting gas thru the carb so put the plug back in and open the throttle and spray starting fluid in for 2 seconds then try it again.
if it is wet, your timing may be off.
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