Strange noise in the engine
 

My XT with this strange noise in the engine, not valve, there is chain of command, with my xt is 23000 km and the year it is 2008.
I find it difficult to search, someone could tell me some topic?
I found this: http://www.xt660.com/showthread.php?...y+noise+engine

You would need to describe the noise in more detail for us.

When do you hear the noise, at idle, at a curtain rpm not riding, only when riding, when accelerating, on over run, when does it make the noise?

Can the noise be heard when Hot or cold?

Where abouts do you hear the noise, from the top of the motor, bottom of the motor, left or right side of the motor?

I went to a trusted mechanic, he heard the engine noise and also confirmed that noise rod knocking.
The noise is from the left side.
The bike is only with 23,000 miles and all exchanges were made of oil

im having simular problem :(

http://www.xt660.com/showthread.php?t=14724

I made a small sound recording and I'll post here later.
this already in the xt660 Yamaha.

Strange noise in the engine

http://www.youtube.com/watch?v=2vUSdLec8yg

When you have the motor stripped let us know what you find.

It sounds like a bent valve to me but then again i know **** all about bikes

Not a bent valve, the motor would not run with a bent valve it's a single cylinder.

Get them to check the decompressioner & pin encase there is a problem there before they pull the motor out. Best get that motor stripped, I would not ride it like that.

the problem is a break in the rod to the crankshaft, but still can not remove the pin crankshaft to know the real problem.

http://www.forumxt600.com.br/forum/f...c01047_322.jpg
http://www.forumxt600.com.br/forum/f...c01049_181.jpg
http://www.forumxt600.com.br/forum/f...c01048_889.jpg