so i have taken an expensive route to sort the rear shock on her bike, which will be done next week.

but im thinking the front forks could probably do with a service... they arent leaking or anything, but i would be surprised if they havent been done before and with 40k on the clock it cant hurt to service them. im considering doin them myself... i have done valve clearances before on an IL4 600cc bike.... so i have some mechanical ability. But i notice in the manual thay there is a 'special tool' for replacing the oil seals in the forks... what is it? And is it really necessary? I imagine its just somethig to ensure the seal goes in square!?

can anyone advise what the special tool is and how expensive they are?

also, on mountain bike forks i have used fork grease on the seals on reassembly... is a similar grease used in motorbike fork servicing?

thanks,
matt.

the tool locks the damper in place so the fork base bolt can be withdrawn allowing you to separate the upper and lower stanchions. I think its the damper anyway.

The tool cost i dont know.

You will want oil seals, dust seals and preferably top and bottom bushings for the best job possible. I would probably measure the springs instead of getting new ones, they will most likely be fine but on the soft side (lower rate) for your weight but it depends how heavy you are and how fast you ride/how much comfort you want tbh.

Do the forks one at a time, the NC24 for instance has different components in each leg due to the anti-dive mechanism, which doesnt seem to do a lot.

Once you pull one apart youll be amazed at how simple they are, far easier than valve clearances.

nc30 duck wrote:I imagine its just somethig to ensure the seal goes in square!?

Precisely. And so that you can fit the seal with the stanchion in place. I made one out of some steel tubing, but poly pipe is probably a better option - you don't want to damage those pricey seals

superlite wrote:

nc30 duck wrote:I imagine its just somethig to ensure the seal goes in square!?

Precisely. And so that you can fit the seal with the stanchion in place. I made one out of some steel tubing, but poly pipe is probably a better option - you don't want to damage those pricey seals

ok, so that can be overcome with a little bit of fabrication.

But sounds like there may be another special toos to get the damping mech out of the fork, it doesnt suggest that in the manual though.

on another subject, i just measured front and rear sag (no rider) and its 37mm front and 3mm rear. The rear shock is coming out mid week to be replaced but the front sounds like its too much sag? What is the nominal front and rear setting for sag for road use only... girl rider!

thanks

Fast road riding would be 25 Front / 15 Rear. Depends how you like it more than anything really.

NC30 has Cartridge forks though so the internals are slightly different (unless you have a very early NC30...)

You can make a fork-seal driver with some plastic pipe :) forks are 41mm diameter.

http://www.gostar-racing.com/informatio ... set-up.htm

This is a great article about how to set your motorcycle suspension up! :)

Really useful that neo!!

ibby4585 wrote:Really useful that neo!!

Yeah man :)

Best to set it up over a few days and with a mate helping you.

Always ride the same test-route when setting things up too (article does state this)

You'll get it bang on in no time :)

Neosophist wrote:

ibby4585 wrote:Really useful that neo!!

Yeah man :)

Best to set it up over a few days and with a mate helping you.

Always ride the same test-route when setting things up too (article does state this)

You'll get it bang on in no time :)

cheers

have just been replacing the rear shock... bit of a fiddly bike to work on... no space anywhere.

anyhow, while i was doin it i took the suspension linkage off for a clean up and check over. Something is puzzzling me though, seems only two of the 3 pivot points have needle rollers,.. the connection to the shock itself seems to be a rigid joint, so when bolted to the shock it restricts rotation... is this correct??

cheers.

i still havent got round to doing these forks.
Im looking for some linear springs to replace the standard ones... its currently wound fully in on preload to get close to a reasonable sag setting.

Can anyone recommend a supplier for a linear fork spring for an nc30 r3n?

thanks