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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #31  
Old 22nd January 2021
SHAKY DAVE's Avatar
SHAKY DAVE SHAKY DAVE is offline
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Default

Quote:
Originally Posted by Iron Mike View Post
I see no mention of a valve job itself. If you haven’t re cut the seats to match the new guide axis, more than likely you will not have a proper seal.
absolutely
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  #32  
Old 22nd January 2021
sungod sungod is offline
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Sportster/Buell Model: sportster xlch
Sportster/Buell Year: 1970
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Sportster/Buell Year #2: 73
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Default pistons

I have a 73 xlh. There are early and late jugs that year. The early jugs are limited to I believe .030 overbore. Before purchasing the pistons make sure your jugs can cleanup first. Any good machinist can do this.I run Wiseco
pistons with Kibblewhite black diamond valves and springs.Just mentioning this as an option for you.

Last edited by sungod; 22nd January 2021 at 17:41..
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  #33  
Old 22nd January 2021
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sungod makes a good point.the.030 bore limit is a factory spec.i have '72 1000 cylinders that have been bored.040 for 40+yrs in a stroker motor.the same cylinders that were used in the early'73.
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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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  #34  
Old 23rd January 2021
Iron Mike Iron Mike is offline
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Thanks for the subtle reminder Bruce. I swear I’ll get the bit gauge out one of these days.
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  #35  
Old 23rd January 2021
Iron Mike Iron Mike is offline
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bore gauge
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  #36  
Old 23rd January 2021
sungod sungod is offline
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Sportster/Buell Model: sportster xlch
Sportster/Buell Year: 1970
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Sportster/Buell Year #2: 73
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Default good time

Now is the time to check rod shake side to side and up and down. Hate to see you rebuild the top end just to have another piston failure. Remember you only have one more overbore (.030) to go on the jugs.PS I had my 73 HD jugs resleeved several years ago by Rask Cycle in PA. The deal was Rask wanted me to purchase the pistons from them.Unfortunately I had already purchased new standard pistons from Wiseco so I made a deal with them.I paid their standard markup on the set and they did the job with my pistons.

Last edited by sungod; 23rd January 2021 at 18:45..
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