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 - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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