Cam School
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Intermediate
Joined: Mar 2013
Posts: 49
Likes: 0
From: Newton
Cam School
I have been reading threads about 777cams, 345 cams, etc. Do these numbers signify anything in particular? Is there a scheme to these descriptions?
Need to get up to speed on this. I am relatively new to HD, but love this site.
Need to get up to speed on this. I am relatively new to HD, but love this site.
Seasoned HDF Member
Joined: Mar 2012
Posts: 100,455
Likes: 19,811
From: Centennial, CO
Lots of stuff on this isn't there? Those numbers are usually just catalog numbers to signify what grind the cam is. You need to decide where you want your power: down low, top end, somewhere in the middle, if you're going to do any more to the engine or stop at just replacing the cams, ride 2 up etc. Different cams even though they may have the same lift numbers will give different performance at different rpm levels due to how the cam is timed to open and close the valves. When you determine where you want your power, go to the various cam manufacturer's sites and find the cam in their charts to fit your needs. Then come back in here and tell us what you think and ask for advice and sit back and watch the fireworks!
Road Master
Joined: Aug 2010
Posts: 1,067
Likes: 2
From: New Hampshire
Tourer
Joined: Aug 2012
Posts: 369
Likes: 1
From: New Jersey
Nice chart. I don't understand it completely but it is helpful. I put myy trust in the stealer (a friend) this time and he told me for my purposes I would see the best all around improvement for the 255,s and is willing to replace them with another model free of service charge if I don't like how they work.
Road Warrior
Joined: Dec 2008
Posts: 1,733
Likes: 38
From: Linden, NC
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Elite HDF Member
Joined: Aug 2008
Posts: 4,133
Likes: 125
From: Japan
THAT'S a bit an an over-exaggeration, I think. Just about ANYone can change spark plugs without f*cking something up, but I don't think it's necessarily a good idea for just anyone to break open the motor on their $20k bike without at least a basic understanding of internal combustion motors, a service manual and all the proper tools. You could easily break **** on a cam change (or once you fire it up) if you don't know what you're doing...there's a LOT more involved and it takes a LOT more time than changing out spark plugs.
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Club Member
Joined: Nov 2008
Posts: 5,481
Likes: 4
From: Georgia
[Quote:]
Originally Posted by QC View Post
If you can change spark plugs, you can do it yourself.[/quote]
That's what I thought too. Only I would call the first quote total horse doo doo. 
Originally Posted by QC View Post
If you can change spark plugs, you can do it yourself.[/quote]
THAT'S a bit an an over-exaggeration, I think. Just about ANYone can change spark plugs without f*cking something up, but I don't think it's necessarily a good idea for just anyone to break open the motor on their $20k bike without at least a basic understanding of internal combustion motors, a service manual and all the proper tools. You could easily break **** on a cam change (or once you fire it up) if you don't know what you're doing...there's a LOT more involved and it takes a LOT more time than changing out spark plugs.