rattle sound
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Sorry I'm on holiday in France at moment miles from any wifi
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Spoke to a yamaha dealer today. He said not to worry and that it most likely is the powervalve vibrating a bit.
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@irongamer727 that is something abit more than the powervalve vibrating I'm sure I'd look into that abit more if I were you, could end up costing you a complete rebuild if it goes
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@andrewj1680 sounds a bit different in reality. But he has been sounding like this a looong time now. Pretty sure it's the powervalve. It's just open and might be shaking a bit.
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Could it be an air leak at the power valve making a sound like a rattle? I've heard different types of pv clattering on a closed throttle but I'm not certain I'd like to ride around with a random rattle without at least figuring out what's the cause.
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For the sake of £20 on gaskets and 30mins work I would pull the top end off could be little or nothing but atleast you know. I'd cringe riding around sounding like that I'd be constantly waiting for it to go bang
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Yesterday I finally took the top end apart. Piston, rings, rod looked perfect! The only probable culprit according to me was the needle bearing. It felt like a "marraccas". Could that have been causing the rattle? The piston and ring gap was not excessive what so ever..
The pv that was supposed to be jammed shut was not "correctly" jammed. It might have caused some rattle sound. But other than that I am clueless. -
Anyone??
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Little end rattle is a common noise to be heard from the top end when a little end bearing is reused and or damaged.
Continual use of a worn bearing will eventually wear out the connect rod, resulting in a rebuild of the crank.
The powervalve can rattle too, if it's not secured properly by the bushes, either worn or the like.
But ultimately, two strokes are rattly by nature, be sure you're not just being paranoid.
