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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 19th June 2019
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Pull the primary cover to drain. It lets you take a look at the internals.
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  #12  
Old 19th June 2019
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for now it's best not to worry about draining the oil from the crankcase.there is only a few ounces in there.it's a dry sump system the oil is stored in the oil tank then pumped through the motor when running.the drain plug can easily be stripped out.if you have an early '71 it might not have a drain plug for the crankcase.
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Old 19th June 2019
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Quote:
Originally Posted by ryder rick View Post
A transfer valve was used up to 76.
Learning something new here.
Here is the tire pressure data from the 70-74 service manual.

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  #14  
Old 19th June 2019
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I would agree with pulling the covers to see the condition inside especially after bike sat for years. Just had a newbie buy a 1977 XLCR fired it up without pulling covers and put a rod through the case after running for 15 miles.
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  #15  
Old 20th June 2019
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Tire pressures
16" rear 41-43psi
front
38-39psi
For clean dry pavement, drop pressure for snow ice or dirt.

The low tire pressures listed in that pic are not for modern tires and are too low.
This will cause uneven and premature tire wear on todays tires.
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  #16  
Old 20th June 2019
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Quote:
Originally Posted by ryder rick View Post
Tire pressures
16" rear 41-43psi
front
38-39psi
For clean dry pavement, drop pressure for snow ice or dirt.

The low tire pressures listed in that pic are not for modern tires and are too low.
This will cause uneven and premature tire wear on today's tires.
Good to know. The pressures listed in my '81 owners manual are mid to high 20# range.

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You will want to check the primary chain tension and the condition of the nylon adjuster shoe, so opening the primary cover to drain the oil is the best bet. Having a new “skid shoe”, “skid shoe” retainer, and primary gasket on hand is a good idea.
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  #18  
Old 20th June 2019
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Quote:
Originally Posted by doodah man View Post
You will want to check the primary chain tension and the condition of the nylon adjuster shoe, so opening the primary cover to drain the oil is the best bet. Having a new “skid shoe”, “skid shoe” retainer, and primary gasket on hand is a good idea.
I'll 2nd that.

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