cam mod

bansheedave · 07-17-2007, 08:22 PM

I was wondering if I can perform the same cam mod on my 04 YZ450F that is performed on the YFZ450 quads? The motors are basicly the same and since my bike is down for repairs I figured I can do it.

tigmaster · 07-18-2007, 06:26 AM

well im not sure wat forum this should go in seeing as we dont have a 450f forum but if u tell me where u want it i will move it. next, if the engines are the same then i would assume so. i need to be filled in on what this cam mod is, tell me.

bansheedave · 07-18-2007, 07:32 AM

basicly it is retarding the exhaust cam one tooth to produce more mid and top end horsepower

tigmaster · 07-18-2007, 11:27 AM

thats nice! as long as the lift on the cam isnt different i wouldnt see why not. just turn it over a few times to make sure nothing is hitting and i would assume everything is good.

bansheedave · 07-18-2007, 12:11 PM

the cam lobes must be different because I did the adjustment. I wouldn't recommend it unless you get the right cam. I have to switch it back because the bike wont start now and all it will do is backfire threw the exhaust. live and learn I guess.

tigmaster · 07-18-2007, 04:56 PM

i bet timing is different and u pushed it to far off. it seems like they would at least change timing between a bike and quad.

bansheedave · 07-19-2007, 05:12 PM

Quote:

Originally Posted by tigmaster

i bet timing is different and u pushed it to far off. it seems like they would at least change timing between a bike and quad.

I am not to sure. I took it apart and put it back and it started right back up. maybe I went the wrong way and advanced the exhaust cam and it was closing before it reached the complete exhaust stroke, I don't know. I know for now I am going to leave it the way it is. When I am done riding for the year maybe I'll mess with it some more. You know.. maybe the cam mod that they do on the quad is to bring it where yamaha has it set on the bikes. They may have it set that way to detune them for a reason on quads, for more low end torque. The bikes do have more of an advantage over quads and they don't require all the low end that a quad needs. Unless I change cams, I am going to leave it where it is.

tigmaster · 07-19-2007, 05:15 PM

ya, i imagine u made sure to turn the engine over a few times after retarding the timing to make sure that valves are not being hit by the piston.

bansheedave · 07-19-2007, 06:03 PM

yeah. I turned the motor over by hand before I replaced the valve cover and the timing covers. after I determined everything was fine I put it back together and started it right up. runs great. one thing I didn't do and need to do is check the valve lash.

tigmaster · 07-19-2007, 10:36 PM

ya that makes a big diff and too much is a bad thing also.

07-17-2007, 08:22 PM	#1 (permalink)
bansheedave C Rider Join Date: Jun 2007 Location: Michigan, hell yeah! Posts: 17 iTrader: (0)	cam mod I was wondering if I can perform the same cam mod on my 04 YZ450F that is performed on the YFZ450 quads? The motors are basicly the same and since my bike is down for repairs I figured I can do it.

07-18-2007, 06:26 AM	#2 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,659 iTrader: (1)	well im not sure wat forum this should go in seeing as we dont have a 450f forum but if u tell me where u want it i will move it. next, if the engines are the same then i would assume so. i need to be filled in on what this cam mod is, tell me. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

07-18-2007, 11:27 AM	#4 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,659 iTrader: (1)	thats nice! as long as the lift on the cam isnt different i wouldnt see why not. just turn it over a few times to make sure nothing is hitting and i would assume everything is good. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

07-18-2007, 04:56 PM	#6 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,659 iTrader: (1)	i bet timing is different and u pushed it to far off. it seems like they would at least change timing between a bike and quad. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

07-19-2007, 05:15 PM	#8 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,659 iTrader: (1)	ya, i imagine u made sure to turn the engine over a few times after retarding the timing to make sure that valves are not being hit by the piston. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

07-18-2007, 07:32 AM	#3 (permalink)
bansheedave C Rider Join Date: Jun 2007 Location: Michigan, hell yeah! Posts: 17 iTrader: (0)	basicly it is retarding the exhaust cam one tooth to produce more mid and top end horsepower

07-18-2007, 12:11 PM	#5 (permalink)
bansheedave C Rider Join Date: Jun 2007 Location: Michigan, hell yeah! Posts: 17 iTrader: (0)	the cam lobes must be different because I did the adjustment. I wouldn't recommend it unless you get the right cam. I have to switch it back because the bike wont start now and all it will do is backfire threw the exhaust. live and learn I guess.

07-19-2007, 06:03 PM	#9 (permalink)
bansheedave C Rider Join Date: Jun 2007 Location: Michigan, hell yeah! Posts: 17 iTrader: (0)	yeah. I turned the motor over by hand before I replaced the valve cover and the timing covers. after I determined everything was fine I put it back together and started it right up. runs great. one thing I didn't do and need to do is check the valve lash.

07-19-2007, 10:36 PM	#10 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,659 iTrader: (1)	ya that makes a big diff and too much is a bad thing also. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

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