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Loud noise with video

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cody0789

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Gsxr nut
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460 Posts
Discussion Starter · #1 ·
Finally got my engine running and its making a loud noise. I had the head resurfaced and valves ground. Valve gap was within spec. Now I have this noise
http://static.photobucket.com/playe...09/suzuki-guy/20130814_133135_zps4caca341.mp4
<a href=http://s890.photobucket.com/albums/ac109/suzuki-guy/?action=view&current=20130814_133135_zps4caca341.mp4 target=_blank><img src=http://static.photobucket.com/player.swf?file=http://vid890.photobucket.com/albums/ac109/suzuki-guy/20130814_133135_zps4caca341.mp4 border=0 alt=></a>

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jed.only

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escape from prison planet
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2,296 Posts
#2 ·
piston to valve clearance was good to go? is the header tight? they both sound the same in a video.
 
jed.only

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escape from prison planet
Joined
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2,296 Posts
#4 ·
did you take the scam out of the head? im assuming so, gathering you had the valves ground. is it possible something was missed putting the valvetrain together? keeper came out. follower not torqued. etc.
 
RatFighter

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UnicycleMode
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7,569 Posts
#6 ·
That sounds like a classic case of 1 tooth off on a cam sprocket and you have a valve slapping some piston. I would pull the valve cover before you start it again and verify your timing marks at TDC.





Did you turn it over by hand before using the starter button to make sure nothing was catching or binding up?
 
94yzf75fighter

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Registered
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4,653 Posts
#9 ·
I can't see or hear the video but from what i read it could be the cam chain tensioner order a manual 1 from eBay for your bike install it and see if fixes the noise if not check your timing again
 
RatFighter

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UnicycleMode
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7,569 Posts
#10 ·
If I was in that position I would double check everything. Video and audio can only pick up so much compared to a trained ear by the bike so I was going on what I figured would be most obvious.





Other thing I could think of would be like mentioned earlier an exhaust gasket leak. Did you use new ones? Or could one have possibly been in there and another over it, or even more so did the new ones go in over the old ones? An exhaust leak can sound like all hell coming apart on an engine with tolerances that tight.
 
RatFighter

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UnicycleMode
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7,569 Posts
#12 ·
I really hope it is something simple, just a forehead slap, slight adjustment, and it's good to go. :)
 
cody0789

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Gsxr nut
Joined
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460 Posts
Discussion Starter · #17 ·
Ok tore bike apart verified that the timing marks were on location(1 on exhaust cam was level with gasket surface and 14 pins on the chain from 2 on exhaust cam to 3 on intake cam). Checked cct and felt fine. No slack in backrun of chain. Could not feel any exhaust leaks by the header. The bike runs great and is responsive so what could this be. It is definitely coming from the head area.

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