cam shaft issue???? throttle body issue?? Injector issue??? - Yamaha Raptor Forum
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post #1 of 14 (permalink) Old 12-06-2010, 11:38 AM Thread Starter
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cam shaft issue???? throttle body issue?? Injector issue???

ok so i got the raptor to turn over, engine is not seized, and no more engine codes. but my decompression pin assembly gets stuck and it is sluggish to turn over. also it sounds like it wants to start but it just pops and every now and then a flame will come out the exhaust. could it possibly be my valves or timing? the cam chain also seems loose, it has a custom extended cam chain tensioner made from kenz. i have a custom made cam from kenz, and a 52mm throttle body with a RC 650 injector. help me please

06 raptor 700r kenz build, +2valves, 105.0 piston, 10mil crank, 52mm throttle body, fci intake. DD lockout. 91hp 68ft*lbs (kenz dyno)
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post #2 of 14 (permalink) Old 12-06-2010, 12:09 PM Thread Starter
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i forgot to mention that the sluggishness gets worse when i open the throttle. also it pops more when i open the throttle as well, but that makes sense

06 raptor 700r kenz build, +2valves, 105.0 piston, 10mil crank, 52mm throttle body, fci intake. DD lockout. 91hp 68ft*lbs (kenz dyno)
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post #3 of 14 (permalink) Old 12-06-2010, 06:23 PM
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Quote:
Originally Posted by peanut butterscotch View Post
i forgot to mention that the sluggishness gets worse when i open the throttle. also it pops more when i open the throttle as well, but that makes sense
If this is the case, then you have too much compression, check out the decompression device................


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post #4 of 14 (permalink) Old 12-06-2010, 08:02 PM
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whats with the custom cam chain tensioner?
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post #5 of 14 (permalink) Old 12-06-2010, 09:23 PM Thread Starter
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ken put the extended cam chain tensioner on i dont know why.

06 raptor 700r kenz build, +2valves, 105.0 piston, 10mil crank, 52mm throttle body, fci intake. DD lockout. 91hp 68ft*lbs (kenz dyno)
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post #6 of 14 (permalink) Old 12-06-2010, 09:25 PM Thread Starter
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If this is the case, then you have too much compression, check out the decompression device................
yea the reason it was doing that was because the timing was off by a tooth. i redid the timing and it jumped 2 this time, the cam chain guide was all chewed up cause of the extension.

06 raptor 700r kenz build, +2valves, 105.0 piston, 10mil crank, 52mm throttle body, fci intake. DD lockout. 91hp 68ft*lbs (kenz dyno)
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post #7 of 14 (permalink) Old 12-06-2010, 09:52 PM
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put a stock tensioner back on it
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post #8 of 14 (permalink) Old 12-06-2010, 11:19 PM Thread Starter
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the chain guide is still chewed up, you thing it will hurt it

06 raptor 700r kenz build, +2valves, 105.0 piston, 10mil crank, 52mm throttle body, fci intake. DD lockout. 91hp 68ft*lbs (kenz dyno)
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post #9 of 14 (permalink) Old 12-07-2010, 09:52 AM
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if your jumping timing,,, replace it all,,, chain,slides, and tensionor....go to site sponser like TQS or KB..
this is just my opion...i have never seen this in person....but i have read a few posts on the YFZ doing it?
might want to change the oil if you think there in bits of plastic from the slides in the motor...

ask some guys that run big stokes.. mabe start a new thead put the problem in the title

good luck
how long have you had this build?

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post #10 of 14 (permalink) Old 12-07-2010, 10:32 AM
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I'd call your builder, there is something wrong inside that thing and your going to ruin some high dollar parts if you jump anymore teeth
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