This is a comment from another forum
have you just awoken from a long sleep or youve never been to a twinshock meet everybody has these, i have a set of hulco shocks from 79-80 with comp and rebound damping so they were on the market then
I will find some pictures. I know there was at least external adjustable WP's in 85 though, but havent been able to confirm if they were around earlier.
Im not saying anyone is right or wrong here but these areas need clearing up if theres going to be any rule changes.
Here is some on a pre 85 EML. I dont know if they are the same as what that guy said he had in 79/80 though
I have got several other pictures of these shocks on pre 85 sidecars, but couldnt confim the period of the shocks though.
Now somewhere i read that a top MX rider was using Hulcos in around 78, but it didnt say if they were adjustable though. I will try and find out who it was now..... ok it was Heikki Mikkola.
I never knew Hulco became WP, are you sure of that? At what time did this happen?