just about to service my front forks due to a blown seal

these are supposed to have been uprated forks but how can i tell

is there a way of telling the spring rate or if they have uprated damping

also what weight oil should i put back in and oil measurement i am 14 stone bike is track use only

otto wrote:just about to service my front forks due to a blown seal

these are supposed to have been uprated forks but how can i tell

is there a way of telling the spring rate or if they have uprated damping

also what weight oil should i put back in and oil measurement i am 14 stone bike is track use only

Standard 10w fork oil.

The service manual has the specifications for oil (you can get on the main website)

The most obvious upgrade is a spring change which could be indicated by straight wound springs instead of the progressive OEM type. If your springs are the progressive type they may still be non OEM but might a different length to the OEM. As a last resort you can measure the wire diameter and compare it to the OEM 4.5 mm. Best way to check spring rate is to measure the sag.

To determine if the damping has been changed you would need to disassemble the valving and compare the shims stacks to OEM, if cartridge type. For oil, start with 10w (ISO 30) like Neosophist said, although damper rod type forks on a track bike might like a heavier oil.