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

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  #11  
Old 29th March 2020
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listing them as .020 oversize is also incorrect.3.200 would be .010 over on a 3-3/16's 1000 cc bore according to my math.it does look like a 1000 cc assy.with the double dots.
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  #12  
Old 29th March 2020
needspeed needspeed is offline
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Quote:
Originally Posted by brucstoudt View Post
..listing them as .020 oversize is also incorrect.3.200 would be .010 over on a 3-3/16's 1000 cc bore according to my math...
Could be .010 over. Maybe.

But often when having custom pistons made the clearance is machined on the piston. So you bore/hone the cylinder to .020 over, which is 3.2075. If the desired clearance is .0075 the piston skirt gets cut to 3.200.

So there's some speculation here, we don't know for sure if the 3.200 size listed is perfectly accurate, so who knows for sure?

But as long as we're pickin this apart the brand listed shouldn't be Kawasaki.
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  #13  
Old 29th March 2020
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Kawasaki Ironheads are very rare.
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  #14  
Old 2nd April 2020
GA_Ironhead GA_Ironhead is offline
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Not as much as you'd expect. I've seen ads for parts...
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  #15  
Old 2nd April 2020
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somebody wanted it.sold for 120.00.
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