raptor 660 can you help ?? - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums
 
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post #1 of 9 (permalink) Old 06-07-2011, 11:58 AM Thread Starter
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Question raptor 660 can you help ??

I posted my issue on raptor forums and 23 views later not one person has even told me what the problem could be
But on my gfs raptor 660
The bike was running as i stopd to adjust the clutch cuz its was all throttle n no go lol so after i adjusted that i turnd the bike off and
Went to start it again and it wont start
It sounds normal when tryin to start untill a few secs later theres a loud knocking coming from the top of the bike i guess were the head is is where it sounds like its coming from and the bike wont start

What could have broke or whats the problem
Thanks corey
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post #2 of 9 (permalink) Old 06-07-2011, 04:13 PM
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check your one way starter bearing they like to go out

06 yfz450-Gibson-PEP ZPS
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post #3 of 9 (permalink) Old 06-07-2011, 04:17 PM
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or the timing chain could have broke i have had that happen before on my 660

06 yfz450-Gibson-PEP ZPS
stroker sb 13.75 cp ported head
Hot cams Intake and stock exhaust
Rossier exhaust
Sredrum 42.5mm carb
FCI Jetting 175m 45p 3 1/2th clip 2 turns
Kick start
Team Fat Boy Racing
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post #4 of 9 (permalink) Old 06-07-2011, 10:41 PM
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My guess would be something like the cam chain too. The only way to know is to tear it down tho.
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post #5 of 9 (permalink) Old 06-07-2011, 11:14 PM
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it is the sound of thee ole mighty craptor begging to be a 450.. haha.. jk. good luck..


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post #6 of 9 (permalink) Old 03-01-2012, 03:08 AM
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Quote:
Originally Posted by 1fast06yfz View Post
check your one way starter bearing they like to go out
x2 I had the same issue with my 660. This fixes it. Get the kit.
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post #7 of 9 (permalink) Old 07-22-2012, 10:49 AM
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What year is the 660? also as stated before one of the best things you can do is pull the valve cover as far as finding or at least ruling out any problems without tearing into it too much.
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post #8 of 9 (permalink) Old 07-22-2012, 11:45 AM
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Most likely the 1 way bearing.
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post #9 of 9 (permalink) Old 12-28-2014, 08:54 PM
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I heard timing chains love to go out on the 660...sounds like your timing was initially off because slack in chain and it finally went
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