I have a ty250d project bike i'm working on, frame has had headstock steepened & peg mounts moved with modern pegs by previous rider. I've just gotten the parts to rebuild the foxshox(trials type) that were already fitted, had to reposition mounts to bring bike back to level.

Now for the big question, are there any worthwhile mods that can be done to the forks while they're apart for seals, ie possibly remake damper rods in alloy with any suggested alterations to hole size & position. I know they'll never feel anything like a set of modern forks but if they can be improved why shouldn't i do it?

Edited March 10, 200917 yr by tony27

I haven't tried this yet myself, but if you are serious about fork performance, you could fit a set of cartridge emulators. There are a couple of manufacturers that make them the right size for those forks and many are now in use in 1970s MX bikes due to the performance benefit. I have not heard of them being used in trials bikes yet but there is no reason why they wouldn't provide a better action if set up properly.

In case you haven't heard of them, they fit between the tops of the damper rods and the springs and take over the control of oil movement from the damper rod holes, which are enlarged as part of the installation. They use a shim stack to control compression damping and fixed holes for the rebound damping.

I would love to hear if someone has tried them in an old trials bike.

If you need stiffer-than-standard Yamaha springs for the TY250 forks, they are available from B&J Racing in Tennessee.