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

This is why REV Limiters are Required - see damage

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Old May 30, 2004 | 09:26 PM
  #1  
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Default This is why REV Limiters are Required - see damage

http://community.webshots.com/user/scoobydfw-date

It looks like the heavier intake valves floated at above 10,000RPM which caused all kinds of damage.

I was working on ignition timing and jetting to dial in upper RPMs when things went bad as motor reved more freely.

I had my rev limit set to 11,000RPM.

I had PAMI valve springs in which do not have enough seat pressure for high RPM.

Everyone should know what their maximum safe RPM is for the valve springs and cams they have installed.

Guess I need to talk to DSMIKE and find out what valve spring setup he uses that enables him to turn 13,500RPM with .450" cams.
 
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Old May 30, 2004 | 09:50 PM
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Default This is why REV Limiters are Required - see damage

OUCH! Are you going with an oversize cylinder now?
 
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Old May 30, 2004 | 09:52 PM
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Default This is why REV Limiters are Required - see damage

Carnage.
 
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Old May 30, 2004 | 10:03 PM
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Default This is why REV Limiters are Required - see damage

Looks like you've got some new paper weights. Good luck getting it put back together again.

Phil.
 
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Old May 30, 2004 | 10:18 PM
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Default This is why REV Limiters are Required - see damage

o that sux, have fun putting back together....lol..
 
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Old May 30, 2004 | 10:30 PM
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Default This is why REV Limiters are Required - see damage

big time bummer dude![img]i/expressions/face-icon-small-frown.gif[/img] I thought I was bummed ( my ECU quit working yesterday ) but I'd rather have my issue to resolve than yours. Sorry, did you make it to the drags?
 
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Old May 30, 2004 | 10:30 PM
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Default This is why REV Limiters are Required - see damage


That sure was DA BOMB [img]i/expressions/face-icon-small-disgusted.gif[/img]

Ok, Sorry, got it out of my system......
 
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Old May 30, 2004 | 10:37 PM
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Default This is why REV Limiters are Required - see damage

That is the worst **** I have seen in a while. Well it is an excuse to build BIG!!![img]i/expressions/face-icon-small-happy.gif[/img]
 
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Old May 30, 2004 | 10:40 PM
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Dam [img]i/expressions/face-icon-small-shocked.gif[/img] the head really took a beating, how long ago were those springs put in ?
 
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Old May 31, 2004 | 12:17 AM
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Default This is why REV Limiters are Required - see damage

I think most of that will buff right out. You're going to have a rough time straightening that valve stem though.
 
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