28-07-20, 09:15 AM
Mate a would advise you don't use PVC tubing, it has a nasty habit cracking and collapsing under load and the load on your front end even under mild braking or dump absorption will be significant which could mean you front end effectively collapses.
Fittiing Hyperpro fork springs, which are something like 10% stiffer depending on what kit you've got, for your weight was the wrong way to go. Fit the standard springs back in, set the static sag, that may mean adding preload, that can be done adding 2mm discs at the top of the spacer on top of the washer plate below the fork nut. What you need is to visit/contact a engineering supplier, who can supply you with 36.75mm x 80mm odd mild steel bar cut into 2mm dics, to give you 2 stacks of 40mm to add to each leg. Add as required to get the correct sag for you weight, you're after between 30 - 35mm, or get the correct weighted springs for your weight.
You could well find you need to do nothing more other than set the sag, if not you can now play with oil weight, 10 may be too much or you need 12, 15 etc. If you want to go further you could start playing with the shim pack, but you really need to know what you're doing if you go that route or get someone to do it for you.
You could well get away with it but it you don't, it could all end in :'( and you won't get the result you're looking for but just another trade off
Fittiing Hyperpro fork springs, which are something like 10% stiffer depending on what kit you've got, for your weight was the wrong way to go. Fit the standard springs back in, set the static sag, that may mean adding preload, that can be done adding 2mm discs at the top of the spacer on top of the washer plate below the fork nut. What you need is to visit/contact a engineering supplier, who can supply you with 36.75mm x 80mm odd mild steel bar cut into 2mm dics, to give you 2 stacks of 40mm to add to each leg. Add as required to get the correct sag for you weight, you're after between 30 - 35mm, or get the correct weighted springs for your weight.
You could well find you need to do nothing more other than set the sag, if not you can now play with oil weight, 10 may be too much or you need 12, 15 etc. If you want to go further you could start playing with the shim pack, but you really need to know what you're doing if you go that route or get someone to do it for you.
You could well get away with it but it you don't, it could all end in :'( and you won't get the result you're looking for but just another trade off
Later