Hi. I'm in process of purchasing a 199?? KTM500. It's water cooled, single shock suspension and upside down forks. I'll figure out the year soon but I know that I'll need a piston and possibly a cylinder sleeve. Other than EBay. is there a source for cylinder sleeve and piston for these bikes? Thanks. [8D]
Andre Horvath at KTM Klassiker has the pistons (Wiseco). Since the cylinder was not originally sleeved, you may have to go through LA Sleeve and have a custom sleeve made. It's possible they have a sleeve on the shelf and maybe also a piston. Another option is to have the Nikasil coating in the cylinder redone.