I have a 03 250 pro and have been replacing slave cyclinder seals however on removing the top hat(plunger) i have found two seals the first similar to a brake piston seal and the second a standard o ring, the top seal didnt look to good so will be replaceing with new set, the spring that runs through the centre has a small steel insert in the centre of the spring aparently this is an 03 thing only and it looks asthough someone has made the one in my bike out of a nail or rivet, ground on the end and generally a bit bodgy just wondering if anyone knows what this is doing as the later models 04 onwards dont have this fitted and im wondering if i can disregard this part or if its crutial to have a new one fitted with new seal kit

I have a 03 250 pro and have been replacing slave cyclinder seals however on removing the top hat(plunger) i have found two seals the first similar to a brake piston seal and the second a standard o ring, the top seal didnt look to good so will be replaceing with new set, the spring that runs through the centre has a small steel insert in the centre of the spring aparently this is an 03 thing only and it looks asthough someone has made the one in my bike out of a nail or rivet, ground on the end and generally a bit bodgy just wondering if anyone knows what this is doing as the later models 04 onwards dont have this fitted and im wondering if i can disregard this part or if its crutial to have a new one fitted with new seal kit

The 02' Pro had two o-rings and a Magnesium sidecase, which was changed in the 03' model to a seal/o-ring and aluminum sidecase. The "nail" apparently is to stabilize the long spring and prevent wear to the servo cylinder tower and I'd probably leave it in there.

Jon