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
front forks
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otto
- Settled in member
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- Bike owned: nc30
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Neosophist
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Re: front forks
Standard 10w fork oil.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
The service manual has the specifications for oil (you can get on the main website)
xivlia wrote:i dont go fast on this bike so really do not need a rear brake.. /
vic-vtrvfr wrote:Ask xivlia for help, he's tackled just about every problem u could think of...
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magg
- Senior Member
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- Bike owned: VFR400
- Location: Blue Mountain NSW Australia
Re: front forks
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.
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.