CAN-AM (BRP) Discussions about CAN-AM ATVs.

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Old Apr 13, 2008 | 12:44 PM
  #11  
MRDS650's Avatar
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UPDATE:
I figured it out Friday night. Took my time, bought a small flash light and found the notch in the crank. The timing was not even close, funny thing is it ran like that for a better part of the year.

When i first put the head on after porting last year i had broken a timing chain and there was concern that i had bent valves. It ran but the power was down compared to before the porting.

Well after properly setting the cams and doing a leakdown test with the crank locking bolt in the air was coming out of the tailpipe faster then going in.

Yes there are bent valves. I am relieved in a way to know why the power was crappy last year.

I took the motor out on Friday night and removed the head. - no marks in the piston - Thank God, cant see the valves not seating but i guess it does not take much of a leak. I will be sending the head off to Eric on Monday for valve replacement and set up.

Hope to be back on the road in a month or so.

Thanks for all your help guys.
 
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Old Apr 14, 2008 | 12:24 AM
  #12  
Goodsound's Avatar
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Set a New OEM chassis 4 stroke national record on his OMW DS855 - 3.93 !
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Did you try kicking the tires and cursing at it real loud?
 
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Old Apr 14, 2008 | 10:11 AM
  #13  
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I threw a few wrenches - didn't seem to help.
 
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Old Apr 14, 2008 | 10:45 AM
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BioWare's Avatar
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<div class="FTQUOTE"><begin quote>Originally posted by: MRDS650

I threw a few wrenches - didn't seem to help.</end quote></div>



It always seems to help me though...LOL
 
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