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5th July 2012
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Biker
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Join Date: Apr 2012
Posts: 38 Sportster/Buell Model: Nightster Sportster/Buell Year: 07
Reputation: 165
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Primary noise
My buddy started his 75 ih the other day and it started making a grinding noise inside the primary. I have not heard the noise yet but was wanting to ask the brain trust to start to get an idea on what it could be before we tear into it. Thanks
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5th July 2012
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Custom Bike Builder
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Join Date: Oct 2010
Posts: 2,255 Sportster/Buell Model: xls roadster Sportster/Buell Year: 1982
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Quote:
Originally Posted by Txn
My buddy started his 75 ih the other day and it started making a grinding noise inside the primary. I have not heard the noise yet but was wanting to ask the brain trust to start to get an idea on what it could be before we tear into it. Thanks
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check out the primary chain adjustment
then look at bearings in there. Nikki
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the difficult can be done immediatey the impossible takes a little longer
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5th July 2012
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Rider Of The Iron Steed
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Join Date: Dec 2003
Location: London, ON Canada
Posts: 23,683 Sportster/Buell Model: XLH Sportster/Buell Year: 1978
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Perhaps the primary chain adjuster shoe/mechanism is worn out, broken, whatever. Happens.
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5th July 2012
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Senior Chief Master Mechanic
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Join Date: Dec 2011
Location: under a roof
Posts: 968 Sportster/Buell Model: xlh 1000 Sportster/Buell Year: 1977 Sportster/Buell Model #2: XLCH 1000 Sportster/Buell Year #2: 1979
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There's lots of stuff in there that can make grinding noises if it isn't right, crank sprocket nut loose, chain adjuster, clutch basket bearing, open that primary up, you'll find the source.
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5th July 2012
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Biker
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Join Date: Apr 2012
Posts: 38 Sportster/Buell Model: Nightster Sportster/Buell Year: 07
Reputation: 165
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Hopefully that sounds alot better that what I was expecting he rides it pretty hard so that wouldn't SUPRISE me
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5th July 2012
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XL FORUM TEAM MEMBER
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Join Date: Jul 2010
Location: Booneville,Ms.
Posts: 2,051 Sportster/Buell Model: XLCH Sportster/Buell Year: 1974
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Elaborate more on this will help the diagnosis you get.Does it make the noise while riding also are just when in neutral,does it get louder in any specific gear?I know you said you having heard it yet but he should know so after you find out let us know.Tell him to take a wooden dowel (I don't like using screw drivers cause of chance of snatch) and place in different spots on motor and up to ear and see if he can pin point if it's at rear bottom are front of primary.
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Murphy's Law 
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5th July 2012
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Senior Master Custom Bike Builder
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Join Date: May 2010
Location: Pottstown PA.
Posts: 5,105 Sportster/Buell Model: xlch Sportster/Buell Year: 1960
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i,agree with post,#3. primary chain adjuster shoe. sometimes the nylon [wear] part of the shoe comes out,or,wear's,out. which makes the chain too,loose,and it willrub on the primary,cover.
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72 1000cc barrels and heads, s&s 41/2'' flywheels, sifton cams, s&s super B w/ zippers thunderjet w/yost powertube, andrews gears,and shafts, competition engineering kevlar wet or dry clutch, 72 oil pump, morris magneto w/auto advance and single fire module, cycle electric generator w/electronic regulator,73 cu.in.
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