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2000 trx400ex
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Discussion Starter · #1 ·
So over the winter I replaced the valve seals and top end of my 400ex because it was burning a lot of oil and smoking. It now has a 11:1 compression piston. It’s running good now for the most part but has a tick. I replaced the timing chain hoping it was the problem but still ticks and tensioner seems to be good. Valves are good I’ve adjusted them multiple times and their in spec. After riding for a while it dies randomly sometimes and pops but only pops when it’s dying. It also cranks for a while before starting again. Could this be cam decompressor? What else could cause a tick like this and is the dying randomly related to it? Thanks
 
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