rattle sound
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wrote on 13 Sept 2017, 05:25 last edited by
the powervalve is open and not hooked up. dont think it is in contact with the piston as it has been sounding like this for a couple of 1000 kilomiters. dont you guys think it might be a worn piston? the snorkel is ON
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the powervalve is open and not hooked up. dont think it is in contact with the piston as it has been sounding like this for a couple of 1000 kilomiters. dont you guys think it might be a worn piston? the snorkel is ON
wrote on 13 Sept 2017, 10:34 last edited by@irongamer727 Ahh if the PV is pinned that would explain why I thought the snorkel was out.
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wrote on 13 Sept 2017, 14:24 last edited by
Ye. Previous owner managed to f*ck up the port somehow. Running great without but the sound worries me. Need this cylinder to last the season out.
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Ye. Previous owner managed to f*ck up the port somehow. Running great without but the sound worries me. Need this cylinder to last the season out.
wrote on 13 Sept 2017, 14:31 last edited by@irongamer727 Literally mitaka piston is £40 plus gaskets £20 and an hour job to replace.
There isn't really an excuse for two strokes to fail.
It's either the piston fails and costs you a full rebuild, or you spend £60 and replace the top end making it good for another 10k miles.
If it is even the top end that's the problem.
Either way, you're putting your life in the hands of a machine you don't feel comfortable in. If the machine fails, you have the risk of taking not only your life, but those around.
For the sake of strippng the cylinder down for a quick gander, it hardly seems worth the hassle of it failing.
That's my two cents anyway. I would always be overly cautious.
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@irongamer727 Literally mitaka piston is £40 plus gaskets £20 and an hour job to replace.
There isn't really an excuse for two strokes to fail.
It's either the piston fails and costs you a full rebuild, or you spend £60 and replace the top end making it good for another 10k miles.
If it is even the top end that's the problem.
Either way, you're putting your life in the hands of a machine you don't feel comfortable in. If the machine fails, you have the risk of taking not only your life, but those around.
For the sake of strippng the cylinder down for a quick gander, it hardly seems worth the hassle of it failing.
That's my two cents anyway. I would always be overly cautious.
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wrote on 13 Sept 2017, 18:34 last edited byThis post is deleted!
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wrote on 13 Sept 2017, 19:41 last edited by
How big is the chance that a dt engine with 24000 km on it has failed connecting rod bearings? Anyone experienced that?
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wrote on 13 Sept 2017, 19:54 last edited by
Entirely possible
Depends on use and abuse tbh
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wrote on 13 Sept 2017, 20:14 last edited by
Does that sound have any similarity with that?
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wrote on 13 Sept 2017, 21:08 last edited by
Sorry I'm on holiday in France at moment miles from any wifi
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wrote on 14 Sept 2017, 15:35 last edited by
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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Spoke to a yamaha dealer today. He said not to worry and that it most likely is the powervalve vibrating a bit.
wrote on 14 Sept 2017, 20:26 last edited by@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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@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
wrote on 14 Sept 2017, 20:36 last edited by@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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wrote on 14 Sept 2017, 21:05 last edited by
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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wrote on 14 Sept 2017, 22:00 last edited by
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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wrote on 17 Dec 2017, 20:41 last edited by
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. -
wrote on 20 Dec 2017, 15:42 last edited by
Anyone??
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wrote on 20 Dec 2017, 16:07 last edited by
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.
Always Originate, Never Pirate!
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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.
wrote on 20 Dec 2017, 16:29 last edited by@calum thanks! What can I look for on the old small end? In order to diagnose whether it was the problem or not.
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wrote on 20 Dec 2017, 16:31 last edited by
Distinct blueing of the small eye or bearing. Lose needles or other wise damage. I think a new small end bearing is like £5 so it's no hardship to simply replace if in doubt
