HELP! my bike is running terrible after front cylinder head swap!!! - Chicagoland Sportbikes
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post #1 of 25 (permalink) Old 05-20-2012, 10:56 AM Thread Starter
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HELP! my bike is running terrible after front cylinder head swap!!!

So I replaced my front cylinder and cylinder head on my 07 SV650 and now my bike is running really weird. It sounds terrible, it is idling pretty slow, when I give it gas it barely responds. Anyone have any idea of what it could be? I am almost positive I lined up the timing marks correctly on the cams. I also smell gas like the bike is running very rich. the front header is hot so the cylinder is working. What could it be??
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post #2 of 25 (permalink) Old 05-20-2012, 11:13 AM
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Your cam timing is off. Probably on wrong stroke when you lined up the timing marks
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post #3 of 25 (permalink) Old 05-20-2012, 11:18 AM Thread Starter
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Your cam timing is off. Probably on wrong stroke when you lined up the timing marks
Thats what I am hoping it is. I will check after work tonight and see. other than that I have no clue what else it could be
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post #4 of 25 (permalink) Old 05-20-2012, 11:30 AM
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Yeah you have to pay close attention to that. Guarantee that's what it is
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post #5 of 25 (permalink) Old 05-20-2012, 01:18 PM
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did you make sure you were at Top dead center BEFORE you took it apart? did you rotate the motor at all after that before you timed it?




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post #6 of 25 (permalink) Old 05-20-2012, 08:46 PM Thread Starter
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I lined up the "F" in the sight glass before I took everything apart and it remained there ever since. I am about to take off the cylinder head cover and check the timing again to see if I did it wrong.
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post #7 of 25 (permalink) Old 05-20-2012, 10:10 PM Thread Starter
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OH MAN! my timing was terribly off! I must have not been at TDC. It is all good now and purring like a kitten! thanks guys!
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post #8 of 25 (permalink) Old 05-20-2012, 10:49 PM

 
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Lucky you are,as to get off so easy.

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post #9 of 25 (permalink) Old 05-21-2012, 06:21 AM
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Lucky you are,as to get off so easy.
Haha, exactly. Working on low compression engines is nice sometimes. lol
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post #10 of 25 (permalink) Old 05-21-2012, 02:51 PM Thread Starter
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yes I am very lucky I didnt bend a valve or anything. probably because it only ran for like 2 minutes like that
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post #11 of 25 (permalink) Old 05-21-2012, 03:01 PM
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I'm always double, quadruple check. Walk away then come back and check it like 10 more times. LOL! My timing check usually involves rotating the motor about 100 times.

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post #12 of 25 (permalink) Old 05-21-2012, 03:09 PM
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post #13 of 25 (permalink) Old 05-21-2012, 03:32 PM
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Quote:
Originally Posted by Grasshopper View Post
I'm always double, quadruple check. Walk away then come back and check it like 10 more times. LOL! My timing check usually involves rotating the motor about 100 times.
I do the same thing.....

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post #14 of 25 (permalink) Old 05-21-2012, 03:38 PM

 
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A good double check is going through a valve clearance check.

For the most part if you can fit a shim in there with the crank ref. right your golden.

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post #15 of 25 (permalink) Old 05-21-2012, 03:39 PM

 
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As a side note the assembly and clearance check on an sv has some difference's as to ref.

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post #16 of 25 (permalink) Old 05-21-2012, 06:49 PM Thread Starter
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Quote:
Originally Posted by Grasshopper View Post
I'm always double, quadruple check. Walk away then come back and check it like 10 more times. LOL! My timing check usually involves rotating the motor about 100 times.
The thing is I swear I checked like 6 times, I just cant believe how the timing marks were lined up it was terrible I dont know how that could have happened lol I guess I shouldve checked one more time.
I took her for a ride and everything is all good!
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post #17 of 25 (permalink) Old 05-21-2012, 06:52 PM
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Most people don't know you have to time cams with the crank. They don't just time to each other.
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post #18 of 25 (permalink) Old 05-21-2012, 07:03 PM
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did you remember to tension the timing chain once it was lined up and before you turned the motor over?

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post #19 of 25 (permalink) Old 05-21-2012, 07:42 PM Thread Starter
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did you remember to tension the timing chain once it was lined up and before you turned the motor over?
yes, the SV's have an automatic tensioner. Everything is all good now but my radiator is leaking for some odd reason. IT NEVER ENDS AHH
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post #20 of 25 (permalink) Old 05-21-2012, 07:51 PM
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yes, the SV's have an automatic tensioner. Everything is all good now but my radiator is leaking for some odd reason. IT NEVER ENDS AHH
Il give ya 100 bux for it.

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post #21 of 25 (permalink) Old 05-21-2012, 08:06 PM Thread Starter
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lol I can buy another radiator for 100!
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post #22 of 25 (permalink) Old 05-21-2012, 08:08 PM
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post #23 of 25 (permalink) Old 05-21-2012, 08:10 PM
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lol I can buy another radiator for 100!
Ok I hear ya loud and clear, $75

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post #24 of 25 (permalink) Old 05-22-2012, 10:25 PM
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Most people don't know you have to time cams with the crank. They don't just time to each other.
you mean its not magic? haha
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post #25 of 25 (permalink) Old 05-22-2012, 10:43 PM
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Quote:
Originally Posted by Grasshopper View Post
I'm always double, quadruple check. Walk away then come back and check it like 10 more times. LOL! My timing check usually involves rotating the motor about 100 times.
Dude, i think I have 10,000 miles on the mustang motor and I haven't turned the starter yet LOL




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