Hi wonder if anyone can help I have an 1980 350t (Yes from e-Bay). It was ok until I checked it out and put engine/ Gearbox oil in then the gears were stiff to change, it also started to leak from the linkage. I have just been using the bike with my son in local trials practise and it is now almost imposable to change gear. Have any other owners had this problem, I also picked up a H&H 350 strangely this also had the same gnarly gearbox but you can at least get some basic function out of it. I have changed the seal to stop the oil leak which did not work and recon it now only holds 1lt before it stops leaking. Basically HELP is this
theiraccilies heel and is there any recommended fix or known solution.
Any help appreciated.