ATC110 Valve Adjustment

[ZandATC]

Hello everyone...

I just got an '85 ATC110 and am in the process of going over it and giving it a good tune up. I don't have access to a service manual, so could someone give me a quick explanation of how you adjust the valves? I read a DirtWheels article on how to adjust the valves on a 200X I believe it was, so Im wondering how different the 110 would be. All help is appreciated...

[ZandATC]

No one...?

[Tri-ZNate]

I have a 110 maunal I could scan for you tomorrow night.

If I remember correctly you take the pull starter, spark plug and the top valve cover off.

Then move the recoil part with your hand till the piston is at top dead center. Get your feeler gauge out (valves should be .005) and check the valves. BUT if the valves are not loose rotate the recoil piece 360 degrees till it is at top dead center again. Once the valves are loose check it with the feeler gauge.

Repeat for the other valve.

Adjust the valves requires you to loosen the nut on the valve and take the screw in the center out the tiniest bit it it is too tight or take the screw in it it is too loose. Then tighten the nut again and your done.

[ZandATC]

What you explained is basically what the magazine said, so Im pretty sure I know what Im doing. If you could still scan the manual for me I would greatly appreciate it though. Thanks a lot.

[Tri-ZNate]

I'll be sure to scan it for ya. It has pics I believe so that helps alot too.

[ZandATC]

I was about to go at it today, but I figured I might as well wait for those service manual scans. Hows that coming along?

[Tri-ZNate]

lol I'll go get that for ya, totally forgot.

[Tri-ZNate]

Here ya go. and look at the pics. They'll show the 70-125 and most are different

[ZandATC]

Thank you very much, this will make my life a lot easier.

[ZandATC]

One more question :)

At the end of page 2 it starts telling how to adjust the cam chain tensioner. Would you mind telling me how to go about doing this also? There was a rattle in it, so hopefully that was it and I can get rid of it. Thanks again.

[Tri-ZNate]

I'll scan that here soon

[Tri-ZNate]

here ya go

[ZandATC]

Thanks for that too. I promise, thats all I'll bug you for lol.

[Tri-ZNate]

just lemme know if you need any other pages scanned. Its not a problem.

[hambone]

hey 250sxwheeliepop ,
could you scan me the valve timing info on the 110.
i just got one and someone habd replaced the rings and the power is os jut there.
i believe the valve timing is off a tooth os two.
it pops back when it's running and boggs down off-idle.
thanks,
hambone

[Tri-ZNate]

yep gimme 5 minutes and it'll be posted.

[Tri-ZNate]

so you want to check the ignition timing right? What year is it anyway?

[hambone]

it's a 84
no i know how to check the ignition timing,
i want to check the valve timing and see that it is set correct.
i don't trust the work the previous owner did.
i did get the valves adjusted, but still think they're outta time.
i spoke to the prev owner on thursday, he said he guessed at the valve timing
and i suspect this is my problem.
i'm sorry i didm't get back last night.
and i was tired as i'd been up since 5 am
i'll check back later on thursday night.
hambone