Forks

If it's broken or just needs tweaked

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michael_650
Posts: 59
Joined: Tue Sep 06, 2016 6:13 am
Location: Philadelphia

Forks

Postby michael_650 » Mon Mar 26, 2018 1:58 pm

The front end is so very very soft. There's an air inlet that I've never filled, but i wonder if it isn't something more serious, unrelated. What are the basic, exploratory steps to figuring out forks? Should there be fluid in them? They feel smooth, just super soft. I don't even know where to start.

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michael_650
Posts: 59
Joined: Tue Sep 06, 2016 6:13 am
Location: Philadelphia

Re: Forks

Postby michael_650 » Mon Mar 26, 2018 2:13 pm

For what it's worth, I found a few pages from a manual about the 79-80 forks; good info! The down side was that there was just one paragraph about 1981 and up: take it to a dealer. Anybody experienced on this one?

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GeorgeSweety
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Joined: Tue Aug 08, 2017 11:47 am
Location: UK.

Re: Forks

Postby GeorgeSweety » Mon Mar 26, 2018 3:10 pm

Hi Michael, I haven't done anything with my Nighthawk air assisted forks but I checked out my workshop manual. There isn't much info on them but this is what I've got from the Troubleshooting page, Soft Suspension, 1, Weak Fork Springs. 2, Insufficient Fluid In Forks. 3, Low Air Pressure.

In the specs, I'm typing this exactly as written.

Fork Oil Capacity, 320+-2.5cm3 (10.8+-0.08 ozs) after assembly.
300+-2.5cm3 (10.0+-0.08 ozs) at draining.

Fork Air Pressure, 70-110 kPa (0.7-1.1 kg/cm2 , 10-16 psi)

The 2 and 3 written after "cm" are smaller and higher than the rest of the letters, I presume this means squared and cubed. Hope this is of some use but it's all I've got at the moment.


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