sprtrx300ex
11-15-2002, 06:28 PM
a while back i noticed a knocking noise comming from the engine after i rode for more than 10 min.. I got my valves adjusted and it still did it. I changed the spark plug. It hasn't knocked since(1 month ago). I looked at the plug and it was black(probably from the valve clearence. Well the noise it comming back again. I haven't changed the type of gas or anything(reguler unleaded 89), so i'm confused. I sure if i change the plug it will stop for a period of time, but will start again. What's the deal? Right now it is all stock.I know it is confusing but i apprciate all help.