I got a set of HKS Hypermax coilovers on my silvia (1989)
Can someone please help me to know what is it useful :
the air plug at the bottom of the rear coilover.
Any idea of the pressure I must pull in it?
I think it's to be a little bit comfy (i had the same things on my old Honda CBR1000 bike)
I bought them used, so i don't have any instruction manual with them :'(
THX