570 Cam Base Circle?
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Road Master
Joined: Dec 2016
Posts: 855
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570 Cam Base Circle?
Does anyone know if the base circle of the 570 cams are the same as stock? I can’t seem to get my adjustable pushrods exactly where I want them, so I’m considering dropping some solid pushrods in there just to make it easy.
Tourer
Joined: Apr 2018
Posts: 295
Likes: 111
From: Medina, Ohio
Why would that matter? You'd bring it to TDC compression one cylinder at a time. Tighten to zero lash, adjust to .120-.140 or however many turns you would need and then wait for the lifters to bleed down and then turn by hand. Why buy solid lifters that you can never adjust?
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Road Master
Joined: Dec 2016
Posts: 855
Likes: 156
Why would that matter? You'd bring it to TDC compression one cylinder at a time. Tighten to zero lash, adjust to .120-.140 or however many turns you would need and then wait for the lifters to bleed down and then turn by hand. Why buy solid lifters that you can never adjust?
The bike sounds great and fires right up, just some clankity clank in that area. Not sure if rods hitting the tube covers or if I OVER extended them or UNDER extended them.
Tourer
Joined: Apr 2018
Posts: 295
Likes: 111
From: Medina, Ohio
I assume the base circle would be the same on all cams for any given engine considering the valves must all close the same way they did with a factory cam.
Tourer
Joined: Apr 2018
Posts: 295
Likes: 111
From: Medina, Ohio
I know HOW to do it, or what I’m SUPPOSED to do...I just did my first cam and big bore install. I’m getting some rattling from the rod/lifter area. Clearly I adjusted something wrong. Figured it might rule out that variable if I can just throw some stockers in there or perfect fits.
The bike sounds great and fires right up, just some clankity clank in that area. Not sure if rods hitting the tube covers or if I OVER extended them or UNDER extended them.
The bike sounds great and fires right up, just some clankity clank in that area. Not sure if rods hitting the tube covers or if I OVER extended them or UNDER extended them.
Unless you primed the lifters with oil and got all the air out, they will clatter for a little bit. If they're still rattling after a couple miles of riding, something isn't right. But the base circle is the base circle. if you were on it and adjusted the PR's from zero lash per the instructions, you should be good.
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Road Master
Joined: Dec 2016
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Likes: 156
Unless you primed the lifters with oil and got all the air out, they will clatter for a little bit. If they're still rattling after a couple miles of riding, something isn't right. But the base circle is the base circle. if you were on it and adjusted the PR's from zero lash per the instructions, you should be good.
Last edited by fxdx1985; Apr 12, 2021 at 02:44 PM.
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Road Master
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Yeah I might pop the covers off and readjust just to be extra sure. I appreciate the input 👍🏻
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Tourer
Joined: Apr 2018
Posts: 295
Likes: 111
From: Medina, Ohio
Like FordHD said, if you followed instructions you should be good. Mine did clatter a bit for a short time. Without hearing it, I can't say much more. You'd know if it was a serious issue. Other than time, it doesn't hurt to check again I guess. Still better than paying $125 an hour haha!
