Join Date: Jul 2008
Location: Railton, Tasmania, Australia
Re: rough ride
Applying historical fault finding principles from my observed trials days, I would be looking at the fork leg seals as it appears as though the fork legs may be sucking in air during extension, thus "jacking' the legs with air pressure. This used to be quite a common problem which could sometimes be rectified by shortening the garter spring on the seals. A caveat though - I am not experienced in the assembly and arrangement of the seals in out K12 fork legs.
1987 Yamaha TY250R
1991 Aprilia Climber 280
1988 K100RT (the pack horse)
2005 K1200LTE Light yellow metallic