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04-21-2011, 03:40 PM
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Join Date: Oct 2010
Location: Dover, Pa
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Exhaust Cam Swap
I am swapping out the stock intake cam for a stock exhaust cam. I have read a number of posts on others doing this swap, but I have not read anything on the clearance after doing this. Does the valve clearance stay the same since both cams have the same lift, or will I need to change the clearance. Any help would be appreciated. Thanks.
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04-22-2011, 10:17 PM
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Join Date: Feb 2010
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I'm asking myself the same question. Anyone?
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MistressKarra
Last edited by X450MX; 08-11-2011 at 11:31 AM.
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04-23-2011, 10:57 AM
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The valve clearance stays the same .....
DONT FORGET TO RETARD THE CAM TIMING BY 3 DEGREES !
__________________
My son is a proven ATV MX champion rider
2009 Can-AM DS 450 XMX, Fox evol 2 fronts and fox rear, Custom motor by Williams ATV performance, motoworks exhaust , BCS intake..
2008 DS 450 Frame: removed all Rivets, modified front frame pieces,BCS frame support kit, replaced all bolts with metric fasteners,ENGINE: Custom Engine build by Williams ATV Performance, BCS intake,SR4G2,x factor nerfs and heels, PEP custom front and rear,Holz A-arms BRP race pkg
more every week 
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04-23-2011, 02:43 PM
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Ok, for Both cams or only the new exhaust at the intake side? And why we need to retard the timing? Thanks!
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Last edited by X450MX; 08-11-2011 at 11:31 AM.
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04-23-2011, 04:07 PM
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Join Date: Apr 2010
Location: Belgium
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retard the cam shaft ?
how do you do that ?
By misaligning the lines of by changing the mounting holes ?
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04-23-2011, 04:13 PM
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you have to pull the timing gear in the bottom of the engine , then degree the cam and retard the "new intake" cam 3 degrees
it will run ok at o degrees ....... it is supposed to run better at 3 degrees retarded
__________________
My son is a proven ATV MX champion rider
2009 Can-AM DS 450 XMX, Fox evol 2 fronts and fox rear, Custom motor by Williams ATV performance, motoworks exhaust , BCS intake..
2008 DS 450 Frame: removed all Rivets, modified front frame pieces,BCS frame support kit, replaced all bolts with metric fasteners,ENGINE: Custom Engine build by Williams ATV Performance, BCS intake,SR4G2,x factor nerfs and heels, PEP custom front and rear,Holz A-arms BRP race pkg
more every week
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04-23-2011, 04:40 PM
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Join Date: Apr 2010
Location: Belgium
Posts: 42
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then you will retard both cam's or am i wrong ?
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04-23-2011, 06:14 PM
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Join Date: Dec 2009
Location: Tampa FL
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only the new intake cam gets retarded (second exhaust cam)
the stock exhaust cam and timing stay intact!
__________________
My son is a proven ATV MX champion rider
2009 Can-AM DS 450 XMX, Fox evol 2 fronts and fox rear, Custom motor by Williams ATV performance, motoworks exhaust , BCS intake..
2008 DS 450 Frame: removed all Rivets, modified front frame pieces,BCS frame support kit, replaced all bolts with metric fasteners,ENGINE: Custom Engine build by Williams ATV Performance, BCS intake,SR4G2,x factor nerfs and heels, PEP custom front and rear,Holz A-arms BRP race pkg
more every week
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04-23-2011, 06:30 PM
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Join Date: Dec 2009
Location: Portsmouth, OH IO
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Thanks for finally shining some light on this subject! I myself am about to do the cam swap along with a few other things.
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2008 DS450x
Motoworks pipe- Race ECU- Pink wire- Velocity filter-13T front sprocket- Powermadd handguards- Pro taper bars- DWT beadlocks- BRP +2 Mx A-arms- BRP adjustable axle, BRP +1 Steering stem
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04-23-2011, 09:54 PM
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Junior Member
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Join Date: Oct 2010
Location: Dover, Pa
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Thanks for the input. I appreciate the help.
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