Air Pressure

Weigth Driver (kg)	XC400 (and older)	XC500	XC600/XC700/XCR	DH3
Standard			3,5 Bar (51 psi)	3,5 Bar (51 psi)
60 kg		2,3 bar
70 kg		2,6 bar
80 kg		3,0 bar
90 kg		3,5 bar

 

Standard pressure:

• XC100
• XC150
• XC400
• XC50 / 51
• XC500 (1993)
• XC600 (1996) – 3,5 bar (51 psi)
• XC700 (1996) – 3,5 bar (51 psi)
• XCR (1996) –
• DH3 (1996-1998) – 3,5 bar (51 psi)

Drivers weigth >100kg: It might be usefull to use a spring tuning kit. 

My advice is to use only 2bar pressure to save seals life time.