Exhaust Cam Swap - Can-Am DS-450 Forum :: DS450HQ.com
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post #1 of 47 (permalink) Old 04-21-2011, 04:40 PM Thread Starter
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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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post #2 of 47 (permalink) Old 04-22-2011, 11:17 PM
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I'm asking myself the same question. Anyone?
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Last edited by X450MX; 08-11-2011 at 12:31 PM.
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post #3 of 47 (permalink) Old 04-23-2011, 11:57 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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post #4 of 47 (permalink) Old 04-23-2011, 03:43 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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post #5 of 47 (permalink) Old 04-23-2011, 05:07 PM
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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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post #6 of 47 (permalink) Old 04-23-2011, 05:13 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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post #7 of 47 (permalink) Old 04-23-2011, 05:40 PM
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then you will retard both cam's or am i wrong ?
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post #8 of 47 (permalink) Old 04-23-2011, 07:14 PM
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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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post #9 of 47 (permalink) Old 04-23-2011, 07:30 PM
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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.

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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post #10 of 47 (permalink) Old 04-23-2011, 10:54 PM Thread Starter
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Thanks for the input. I appreciate the help.
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