How to: fit a BMW s1000rr rear shock to a VFR 400 nc30

[krisztian_andre]

Are these ok to use with a heavier spring without revalving? .

Question is, are they rebuildable?
How much did you pay for yours?

[iDemonix]

90 posted

[krisztian_andre]

Does it clear a tyga exhaust, should I wrap the headers?

[tanto]

Are these ok to use with a heavier spring without revalving? .

Question is, are they rebuildable?
How much did you pay for yours?

Like Andre, I would like to know if these Beemer shocks are easily re-buildable. If they are, changing or adapting the shock valve and shim height would be possible.

MC shock valves are not complex objects, although the fluid dynamics and modelling involved to re-calculate changes to the valve holes is horrendous. A more practical approach may be to either find replacement valves for Sachs/BMW shocks, or give the existing valve holes some Dremel love...

Does anyone know where to find Sachs or Sachs-fit replacement shock valves? Who is the UK expert on Sachs shocks?

[V4beermonster]

Great post shock and spring ordered £115 for both. Look forward to fitting them. Just fitted RO fork upgrade haven't ridden bike yet but can see already they don't sag so much under the bikes own weight.

[krisztian_andre]

How would fitting an nc35 linkage to my nc30 change the springrate calculation for this mod?

[Tim400GB]

You can't fit an rvf nc35 lower linkages to a vfr nc30 with a BMW shock. The spring of the shock fouls on the swingarm.

I couldn't even bolt it in. Had to use the nc30 lower linkages.

[krisztian_andre]

You can't fit an rvf nc35 lower linkages to a vfr nc30 with a BMW shock. The spring of the shock fouls on the swingarm.

I couldn't even bolt it in. Had to use the nc30 lower linkages.

That's good to know. I'll stay with the 18'' wheel then.

[999Gomerz]

Are these ok to use with a heavier spring without revalving? .

Question is, are they rebuildable?
How much did you pay for yours?

Like Andre, I would like to know if these Beemer shocks are easily re-buildable. If they are, changing or adapting the shock valve and shim height would be possible.

MC shock valves are not complex objects, although the fluid dynamics and modelling involved to re-calculate changes to the valve holes is horrendous. A more practical approach may be to either find replacement valves for Sachs/BMW shocks, or give the existing valve holes some Dremel love...

Does anyone know where to find Sachs or Sachs-fit replacement shock valves? Who is the UK expert on Sachs shocks?

Oh dear. I would not be breaking out the dremel on the piston. This is why there is a shim stack. To allow you to modify the damping curve.

Also. It is pretty to see by a photo that the shock is "re-buildable".

I am still amazed that everyone is buggeri g aroundwith the standard link and spending a boat load on a shit shock. If you get an hrc link the link ratio will be much more "normal" and you will be using a 90Nmm - 120Nmm spring which is what most of thesedonor shocks come with. So even if you use a different spring chances you won't have to revolve the shock.

[Tim400GB]

The bmw shock doesnt cost a 'boat load' though, and due to the fact most if not all standard nc30 units are beyond tired it makes an unvalved bmw shock a good cheap option.

For the cost of a bmw shock and HRC linkages you could just buy a nitron