Posted by rrlund on April 17, 2012 at 13:26:41 from (207.241.137.116):
In Reply to: Yamaha Moto4 posted by rrlund on April 17, 2012 at 09:18:47:
Took the valve out of the head. Stem isn't bent,just the head of it. It and the piston look like the valve hit it. When I called me son,he said we put a valve and a rocker both in it last year. It kicks back every so often if it stalls or if I let off the starter at just the wrong time. I'm wondering if when it kicks back,it might be jumping timing? I know we had to put a new timing chain tensioner in it last year when we put the valve in. Thought we had it tight enough,maybe not?
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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