WANTED: S&S .600 Cam UPDATE:

cdogg556

cdogg556

Guru
Unsprung said:
Do I have to do that in order to pull the cover and check the cam numbers?
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No, as soon as you pull the cover all you gotta do is look at the cam and the size will be stamped on it where it's easily visible, here's my old cam I removed, 546 cam.jpg
Pull the cover and don't touch or loosen anything unless you decide to change it, if you do then you need to do as Ker says and rotate the engine untill all your timing marks line up, you can do this by removing the spark plugs, put the bike in 5th or 6th gear and rotate the rear tire, then loosen the pushrods and then you can remove the cam.
 
Unsprung

Unsprung

In the Potters hand...
BWG56 said:
Isn't the cam cover location pinned on the 107? If it is, like the 117, how do you expect to get the cover back on against the valve spring pressure?
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Ker, I'm a noob with all things V-twin so that's why I'm asking. I've rebuilt several engines as a diesel tech back in the day but never anything this small. I don't want to do it wrong and I'm not opposed to buying a manual for the 107 if needed. I want to ID my cam so I can plan accordingly if I decide to keep the bike and get it up to BDB standards, lol. Thanks for the help.
 
BWG56

BWG56

Guru
I'm with ya on being a newb for rebuilds, I was just curious cause some say you don't have to, but my experience after I put the 585 in mine,and adjusted the push rods, I wanted to check something and I pulled the cover back off and I could not get it back on until I backed off on the push rods again. I would think there's always going to be 1 of the 4 valve springs pushing on the cam, otherwise you would have to have all 4 valves closed at one time, and that ain't happening
 
john sachs

john sachs

Well-Known Member
Not all cams are marked on the front where it would be easy to see what you have. Some are marked on the rear lobe, etc.
Release the push rods BEFORE you remove the cam cover. they will keep pressure on the cover, making it more difficult to remove.
As fa as cam timing on the 585, 600, 640, go on the S&S website to see the difference.
The 600 is more radical than the 585. the 640 is a heavy hitter, but a late bloomer. You need to rev the hell out of the motor to take advantage of it.
John
 
Unsprung

Unsprung

In the Potters hand...
john sachs said:
Not all cams are marked on the front where it would be easy to see what you have. Some are marked on the rear lobe, etc.
Release the push rods BEFORE you remove the cam cover. they will keep pressure on the cover, making it more difficult to remove.
As fa as cam timing on the 585, 600, 640, go on the S&S website to see the difference.
The 600 is more radical than the 585. the 640 is a heavy hitter, but a late bloomer. You need to rev the hell out of the motor to take advantage of it.
John
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Well that's not encouraging me to touch it unless I'm prepared to go all the way. It would be a shame to pull the cover and not be able to ID the cam. Maybe my time and small budget would be better spent in getting it running right and clean, then worry about the cam.
 
FrankBDPS

FrankBDPS

Well-Known Member
Unsprung said:
Well that's not encouraging me to touch it unless I'm prepared to go all the way. It would be a shame to pull the cover and not be able to ID the cam. Maybe my time and small budget would be better spent in getting it running right and clean, then worry about the cam.
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Now you are thinking clearly. Tune it up. The history of the 107 indicates that they were assembled by S&S and have higher compression and the 600 cam in them. Good luck!
 
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