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adamsj13
12-29-2005, 05:40 PM
I have a Honda atc 70 that I need to adjust the valves on. I called the local shops and none will work on it because its a 85. I bought a feller guage. I have a glymer manual and tried to do exactly what the book says and I just cant get it right. Ever since my brother played with the valves I haven't been able to get it started. I have fire, and I can smell exhust coming out of the pipe. I get back fires when I try to start and the back fires seem to come from the carb area. There is a little cap over the choke leaver and it pops off once in a while when it backfires. Can someone help, maybe specific instructions on how to adjust the valves correctly. I will also clean the carb again. Please any help is greatly appreciated. If you need more information, please let me know.

Thanks a million
HaggLE
12-29-2005, 05:50 PM
Make sure that the valve is in the closed position before adjusting. Turn engine over until there is the mose clearance and then use the feeler gauges.
Unclediezel
12-29-2005, 08:35 PM
think for a second-------4 strokes---Suck-Squeeze-Bang- and Blow.

When an intake valve is OPEN----Exhaust is Closed----turn the engine until a rocker arm travels down--(Doesnt matter which one)-and adjust the OTHER one--
mymint87
12-29-2005, 08:43 PM
think for a second-------4 strokes---Suck-Squeeze-Bang- and Blow.



Hey thats cool....hows a 2 stroke go?
adamsj13
12-29-2005, 09:46 PM
think for a second-------4 strokes---Suck-Squeeze-Bang- and Blow.

When an intake valve is OPEN----Exhaust is Closed----turn the engine until a rocker arm travels down--(Doesnt matter which one)-and adjust the OTHER one--

Just so I understand right, turn the engine until the rocker arm is down, then adjust the other one and vise versa? And not do it when both rocker arms are up(free)
Unclediezel
12-29-2005, 10:18 PM
squeeze-Blow????????

Exactly----free rocker is closed valve-----If the opposite is open---then you can be POSITIVE that the one your working with is closed. Just keep in mind ---PAy attention to which one your working with--because most engines have 2 specs---Intake and exhaust.
TeamGeek6
12-30-2005, 07:44 PM
May have a burned intake valve if its run too hot or too tight on valve clearance. Do a compression check too.

Ive seen a similar problem with Honda 4 cylinders whose valves got tighter as the engine got hot.
adamsj13
12-30-2005, 09:19 PM
Is it hard to change out vavles?