NSR fork rebuild advice please.

[jimmyjaffa]

Hi all, just need some advice about fork rebuild. I'm all ok about changing the seals etc it's just what grade of oil to use. I'm a big lad at about 20 stone and the forks where a bit soft( no surprising ), I was thinking of using 20w oil with a spacer on top of the spring. Do you think this would be ok. Cheers for any advice. Jim.

[supZ]

speak to https://www.mctsuspension.com/home.htm

they're great with general advice and will do a top job if you decide to get them to do it as well. cant recommend them enough.
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CBR954RR - Daily toy
CBR600RR - Trackbike

[G]

Ideally you want to get a spirng that is correct for your weight if possible.

The spacer will add pre-load to the spring, however it'll still be the same basic spring which will probably not be designed for a range that includes your weight.
Thicker oil will make damping stiffer, but this doesn't address the spring.

However, if budget is tight, try a thicker oil and preloaded spring to see how it feels - it's a bodge that can make things better if not ideal.

[alains]

use fork oil grade 20 instead of 5 or 10
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the worst day fishing is better than the best day working

[jimmyjaffa]

Right, the way I have gone is I have used 15wt oil and spaced with 4x 2 pence pieces per fork. Will fit them tomorrow and when the weather gets better ill try them out. But they are stiffer than before.

[G]

If you suck the same amount of oil out each side, you can then add lighter or heavier to make a mix somewhere inbetween if you want a bit of 'fine tuning'.

Remember the air gap also gives some 'tuning' potential near the bottom of the stroke too.

[jimmyjaffa]

Hi all, just been out on the bike and what can I say. Totally different ride, just the right stiffness in the forks and no leaks.