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

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  #41  
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Peteroo Peteroo is offline
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cant find the inner spring length spec in the manual. does anyone have that spec?
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  #42  
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Yes the inner spring is shorter. You will also notice that the inner spring is wound the opposite direction as the outer. This counteracts any twisting forces by working against the outer.

For this reason I don't use or recommend aftermarket single springs.

I have never felt the need to replace the OEM springs on a street machine. If you NEED (not want) more spring pressure use the shorter spacers.

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  #43  
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sounds good, thanks!
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  #44  
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actually theres a brass washer behind the thrust collar(as placed by previous owner). Im not seeing this in the parts diagram. Any reason to keep this?
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  #45  
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Quote:
Originally Posted by Peteroo View Post
cant find the inner spring length spec in the manual. does anyone have that spec?
In my 1979 to 1985 Service manual it says the wear limit is 2-11/32 inch for inner and outer spring lengths.
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  #46  
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The brass washer is for the electric starter!!!!
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  #47  
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The specs are on pages 3-1 and 3-2, mostly 3-2, of 99484-85
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  #48  
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Quote:
Originally Posted by IronMick View Post
The specs are on pages 3-1 and 3-2, mostly 3-2, of 99484-85
The wear limits for clutch springs, plates, transmission shafts, etc is on page 6-4 in my manual part number 99484-85.

I think that the OP is speaking of clutch springs, not valve springs.
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  #49  
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^^^^^
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  #50  
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sounds good, keeping the copper washer and the inner spring is just within spec so not going to worry about it. a little strange that it wears out faster than the outer. Now on to some mild porting on heads and buttoning up clutch side
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