[cody0789]

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]

piston to valve clearance was good to go? is the header tight? they both sound the same in a video.

 

[cody0789]

Clearance was fine. Header is torqued to spec

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[jed.only]

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.

 

[cody0789]

Yes both cams were taken out of the had and were torqued in sequence per the manual. Maybe the cam chain tensioner??

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[RatFighter]

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?

 

[cody0789]

I can assure you that my timing is not off. I triple checked it according to the manual and zip tied it before I bolted everything down.

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[cody0789]

And yes I roatated it over by hand with the starter off as well as the valve cover so I could see everything

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[94yzf75fighter]

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]

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.

 

[cody0789]

I will double check the timing and the exhaust very well could be leaking but man ive heard exhaust leaks and it sounds like a chatter. I appreciate yoyr help ratfighter!

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[RatFighter]

I really hope it is something simple, just a forehead slap, slight adjustment, and it's good to go.

 

[cody0789]

Trust me, me too! !

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[jed.only]

Yeah could be tensioner, didnt even think of that. Hopefully it's just a wicked exhaust leak.


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[cody0789]

Manual says rotate crank In normal running direction. Just to verify that is clockwise right?

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[jed.only]

Manual says rotate crank In normal running direction. Just to verify that is clockwise right?

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yes.

 

[cody0789]

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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[jed.only]

Keeper/follower/bucket maybe, I'm not sure what's hydraulic, but maybe it isn't pumped up, like OG hydraulic lifters in a SBC


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[cody0789]

Idk its weird no FI light or anything is on. Also weird problem bike runs rough but if I tip my tank up it runs better. Set it down runs rough again. What could this be???

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[cody0789]

Its weird just switched fuel pumps to make sure it wasn't that and its like as soon as you set the tank down it stalls out

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