(28-07-20, 09:15 AM)Gnasher link Wrote: 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.
Perhaps I should clarify: I'm not going to be using the PVC permanently :eek
Once I've got the spacer the right length to get the sag correct (I've also bought some penny washers for fine adjustment), then I'm either going to cut down the OEM spacers or get some new ones made up :thumbup
Quote: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.I don't think so. I looked at this carefully for quite a while and the OEM springs are a) 14 years old and b) too soft anyway, so I wanted something that had a bit more resistance, but simply adding preload to the existing ones could have resulted in the spring becoming rigid under hard braking.
Quote: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.
Hyperpro supply 15W fork oil with the springs, but that will, of course, only affect the damping, so I'll wait until I've got the preload right before I start playing with that.
Also, of course, if I get too much dive, I can adjust the air gap, but that's the last stage.
I did try out the new springs, taking the bike up to 60mph and then doing a hard stop (not quite full on emergency stop) and I'm using about 80% of the maximum fork travel, which is ok.