Author Fork oil.... non CBF  (Read 700 times)

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  • Offline edger   gb

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    Offline edger

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    Fork oil.... non CBF
    on: 08 February, 2024, 05:53:09 pm
    08 February, 2024, 05:53:09 pm
    Playing around with a old suzuki ,toying with changing the front end, . The Question is as the doner bike is 20kg ish heavier ,  faster and sportier than the recipient should I stay with the original oil weight and quantity or go a bit lighter and less?
    ( Another winter day dream that's got a bit out of control :008:)

  • Offline raYzerman   ca

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    Offline raYzerman

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    Re: Fork oil.... non CBF
    Reply #1 on: 08 February, 2024, 06:13:38 pm
    08 February, 2024, 06:13:38 pm
    I'd judge it by how it handles the bumps.... likely it is the old damping rod type with holes for oil passages..... mostly one would upgrade the springs for your weight and depending on the valving would increase fork oil weight to "fix" it.  I'd just ride it now and see what you think it needs.....
    I would not decrease fork oil weight unless it rode to harshly.... usually nobody does.  If there is a forum for that bike, perhaps they have folks who have done suspension upgrades.
    Last Edit: 08 February, 2024, 06:14:20 pm by raYzerman

  • Offline edger   gb

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    Offline edger

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    Re: Fork oil.... non CBF
    Reply #2 on: 13 February, 2024, 01:00:41 pm
    13 February, 2024, 01:00:41 pm
    So I drained the forks .one side had 450ml ish the other 400 (425 is recommended ) and it was a strange green swampy colour I imagine they had not been serviced since the 90s
    Any way refilled with  10 weight, just waiting for the rain to ease up to road test I don't expect a huge transformation but twin discs and four pots are going to be a upgrade from single disc and one pot sliding pad set up 

  • Offline Art   england

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    Offline Art

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    Re: Fork oil.... non CBF
    Reply #3 on: 13 February, 2024, 01:42:25 pm
    13 February, 2024, 01:42:25 pm
    Stale fork oil usually has an eggy smell about it but I've seen all sorts in forks engine oil, automatic transmission fluid, brake fluid and then some, maybe a previous fettler filled them with Duckhams Q.

    You won't be far out with the original 420 ml, 10W specification, 20 Kg is only the difference of an extra pie or two per week in your diet  :016:

    When upgrading the hydraulic brake (calipers and discs) you'll need to upgrade the master cylinder too.
    Last Edit: 13 February, 2024, 01:51:02 pm by Art