Question about 1994 Suzuki RF 900 R

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My rear shock is too soft.the bike is 14yrs old

I need to know wat psi to pump it up to.ive got the shock set to its last setting

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You cant air anything up it is nitrogen filled the only thing you can do is buy a stiffer spring from someone like race tech suspension and you could also have them revalve it to your weight. or you can do it yourself.

Posted on Nov 23, 2008

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I have a 1987 cbr 600r Hurricane and i need to know how much air to put in the front forks?


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1 Answer

How much air (p.s.i.) should there be in the front and back shocks


Hi.

Depends on what you want to get. In theory the fork can be between 0 and 43 psi. In practice if you put 40 psi it will be completely stiff and seals may start leaking.

In practice the front take 0 to 12 psi, and rear shock from 7 to 21 psi.

If you need street performance put more pressure. Settings for comfort in long travels will require lower pressure.

Here tables from service manual:

FRONT

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REAR:

Rear shock absorber air pressure can vary from 0.5 kg/cm2 (7 psi) to 1.5 kg/cm2 (21 psi) as the road conditions become more severe or the load increases.

For the front here below the procedure from service manual. I suggest staying far from the 43 psi limit suggested if you do not want to break the seals.

8. Make sure the front wheel is off the ground and inflate the forks to 0-0.4 kg/cm2 (0-6 psi). Do not use compressed air; use only a small hand-operated air pump.
CAUTION
Never exceed an air pressure of 43 psi (3.0 kg/cm2) as damage may occur to internal components of the fork assembly.

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1 Answer

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Set them on the firmest selction.
On my bike i use a soft setting when i ride alone and a firmer setting when carrying a passenger.

340 lbs is a big man, use the firmest selction.
If that is too hard drop one setting, but you don't want to be too soft and bottom out the rear tire to the rear fender.

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1 Answer

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