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Sportster Motorcycle - Bottom End Cams, Cases, Gears, Flywheel, Piston Conecting Rods, Oil Pump, etc...

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  #1  
Old 23rd May 2015
Wheelies Wheelies is offline
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Default clearance issue with new cams. Stuck again!

So I'm installing my impact 560 cams and the lobes are making contact with the area of the case where the bottom of the lifter rolls on the lobe on the 3 and 4 cam area. Any suggestions for this? It looks like on the hammer faq they reference grinding this area down but with the polished look of the inside of that tube I'm hesitant to start grind away at the area.
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Old 23rd May 2015
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Looking again I'm going to have to take a whole lot of material out of this area to make these lobes fit. I put the stock cam into that bushing and turned it over and there wasn't much clearance even for those. How does this casing have so much extra material in that area?
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Old 23rd May 2015
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some bikes just have extra material there you'll need to grind off the back side of the cam lobe its really easy it's not difficult.
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Old 23rd May 2015
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Quote:
Originally Posted by ReddTigger View Post
some bikes just have extra material there you'll need to grind off the back side of the cam lobe its really easy it's not difficult.
So grind off the back of the cam lobe? It seems like it hits all the way across the width of the load.
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Old 23rd May 2015
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If it's the aluminum casing, grind the casing, if it's the bearing race, grind the cam lobe on the side.
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Old 23rd May 2015
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Quote:
Originally Posted by ReddTigger View Post
some bikes just have extra material there you'll need to grind off the back side of the cam lobe its really easy it's not difficult.
Quote:
Originally Posted by Wheelies View Post
So grind off the back of the cam lobe? It seems like it hits all the way across the width of the load.
It sounds like the cams are hitting the lifter bosses, as also described on Hammer's site, about half way down the page under Advanced Cam Installation. If that's the case, the bosses will have to be cut down.
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Oh yes. I hee was referring to the bushings.
The bosses are s little tricky. . But still easy
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Old 23rd May 2015
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This is what's going on. I'm just suprised it requires removing so much material because these are bolt in.
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Old 23rd May 2015
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So it's safe to just grind that off the case?
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Old 23rd May 2015
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Yes. but You want to take precautions to keep out the flales of metal
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