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3 Weeks Ago
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Flat Track Racer
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Join Date: Sep 2019
Posts: 222 Sportster/Buell Model: XLH Sportster/Buell Year: 1969 Other Motorcycle Model: 111 Ironhorse Outlaw Other Motorcycle Year: 2004
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cam lobes
Obviously cams wear. How much is acceptable? Take a SIFTON cam for example with nice broad lobes, how much wear on the corners is acceptable? How about a small patch of the hard layer missing? What can be done to salvage? Has anyone ever used or recommend a regrind service?
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3 Weeks Ago
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XL FORUM TEAM MEMBER
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Join Date: Jul 2014
Posts: 5,409 Sportster/Buell Model: Xl1250S Sportster/Buell Year: 98 Other Motorcycle Model: Kawasaki Vulcan 500 Other Motorcycle Year: 95
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How about some pics and measurements?  |
3 Weeks Ago
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Biker
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Join Date: Oct 2019
Posts: 28 Sportster/Buell Model: 883 Evo Sportster/Buell Year: 1989
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Does the roller over-ride the edge of the lobe?
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3 Weeks Ago
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Senior Master Custom Bike Builder
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Join Date: Mar 2006
Location: Athens, GA
Posts: 5,215 Sportster/Buell Model: XLCH Sportster/Buell Year: 1962
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FWIW, Black Widow Cams bought the old Sifton masters and equipment at auction. V-Twin bought the Sifton name. BW may be able to help you out. Blackwidowcams.com, now http://www.crazyhorsespeedshop.com/
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3 Weeks Ago
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Flat Track Racer
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Join Date: Sep 2019
Posts: 222 Sportster/Buell Model: XLH Sportster/Buell Year: 1969 Other Motorcycle Model: 111 Ironhorse Outlaw Other Motorcycle Year: 2004
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Quote:
Originally Posted by GA_Ironhead
FWIW, Black Widow Cams bought the old Sifton masters and equipment at auction. V-Twin bought the Sifton name. BW may be able to help you out. Blackwidowcams.com, now http://www.crazyhorsespeedshop.com/ |
That's good information. I will contact them. Thank you. |
2 Weeks Ago
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XL FORUM TEAM MEMBER
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Join Date: Jul 2008
Posts: 9,741 Sportster/Buell Model: 1200s Sportster/Buell Year: 2001 Sportster/Buell Model #2: xlch Sportster/Buell Year #2: 1974
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cams are surface hardened. yes they can be repaired but usually more cost effective to buy new unless you are reshaping the profile.
if you have radius ride, that needs to be corrected, should be nil. radius ride stresses the assy as contact angle will cause cam walk.
i have some high mileage p's that are showing some pitting but with hd quality back then, could have been there from the factory, if it fits>ship!
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2 Weeks Ago
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Flat Track Racer
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Join Date: Sep 2019
Posts: 222 Sportster/Buell Model: XLH Sportster/Buell Year: 1969 Other Motorcycle Model: 111 Ironhorse Outlaw Other Motorcycle Year: 2004
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Quote:
Originally Posted by bustert
cams are surface hardened. yes they can be repaired but usually more cost effective to buy new unless you are reshaping the profile.
if you have radius ride, that needs to be corrected, should be nil. radius ride stresses the assy as contact angle will cause cam walk.
i have some high mileage p's that are showing some pitting but with hd quality back then, could have been there from the factory, if it fits>ship!
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I've contacted several establishments on repairing my cams. From what I have learned they are repairable but it's not cheap. Fortunately #4 is the one I am most concerned with and the easiest on my bike to look at regularly. When it goes back together I'll break in the new rings and change the oil to a good synthetic. Hopefully a quality lubricant will give me a few more miles out of these cams. |
2 Weeks Ago
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Senior Master Custom Bike Builder
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Join Date: Mar 2006
Location: Athens, GA
Posts: 5,215 Sportster/Buell Model: XLCH Sportster/Buell Year: 1962
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Who's willing to do the work?
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2 Weeks Ago
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XL FORUM TEAM MEMBER
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Join Date: Jun 2009
Location: Sunshine Coast
Posts: 4,842 Sportster/Buell Model: XLB, XLCH, Sporton Sportster/Buell Year: 1962 Sportster/Buell Model #2: XLCH Sportster/Buell Year #2: 1966 Other Motorcycle Model: XLCH (Another one) Other Motorcycle Year: 1966
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If it's only at the edge of the lobe this may not be a problem.
The lifters should run on the middle of the cam lobe, not near the edge. With second hand cams you can often see just exactly where the lifter is running.
Having a hard surface layer mans if the cams are dropped onto a hard surface you can "chip" the surface on the side of the cam. If the chip isn't too big it may not be a problem.
keep a careful eye out for shiny metal when you do your oil change.
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