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Thread: There and back again [HS400 maintenance, finally!]

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    Member YS400's Avatar
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    Question There and back again [HS400 maintenance, finally!]

    Things got quite hectic in 2018... Bottom line, the YS400 has sat unloved and unused for maybe 9 months... Ordering oil filter and air filter oil (motor oil not recommended for foam filters) today. Both fuel filters as well.

    Dirter, I saw your removal of the front anti-sway bar, my HS400 rides like a lumber wagon... What was the shorter length of the lower shock mount bolt? What struggles occured? Did you jack up the front end to let the front tires hang down?

    UPDATE: Different versions of the Schematics show front and rear anti-sway bars are coupled to mounts on the lower suspension frame. Some show attachment to the lower shock mount... Grrr... Not the first time the manual has been wrong...

    UPDATE AGAIN: Looks like the rear anti-sway versions both attach to the suspension frame, while the front anti-sway can attach to the suspension frame -OR- around the lower shock mount...

    UPDATE FRENZY: After looking at the front sway bar linkage, you could leave the lower Ball joints still attached with the original lower shock mounting bolt. The upper and lower ball joints are connected with a threaded tie rod.. (so this schematic version shows). That will let you try the resulting handling while you measure the width, ear to ear, of the lower shock mount.

    90645-116-0000 Bushing φ10φ1620
    B06-M101.2595-57 Bolt M101.2595

    Looks like the original lower arm shock mount used a 60mm long bolt...
    B06-M101.2560-57 Hexagon flange bolt M101.2560

    Odd, no bushing is called out.
    Last edited by YS400; 04-16-2019 at 02:56 PM.

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    Member YS400's Avatar
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    It was in the 60s on Tuesday (23d) and it didn't need much choke. Got it running, it ran for a few minutes, then killed. Was a bit weak cranking but it caught again. Ran it about 30 minutes to pump up the battery. Air filter foam sleeve is starting to give a little bit. Washed it, blotted it dry, then foamed it with Uni. Bit hard cramming the filter back in after adding the orange seal to replace that thin foam ring. Able to get the three clamps to snap on.

    The 2011/12 carburetted fittings for the fuel system appear to be 1/4", and the metal EFI fuel filters are 5/16. Got the new filter on, but the original spring hose clamp will NOT fit over the barb.

    Oil filter still the same, the end cap filter wrench uses a 1/2" drive...

    Checked the tiny radiator, coolant is about 1/2" below neck, but recovery tank is very low, need to top it off. Odd sort of "jelly" around the radiator cap spring loaded seal. Huh? Fluid itself looks OK, I should drain it this year... Temp light flickers at time during running, might be an air bubble that needs to be vented or it is a byproduct of the low fill in the recovery tank aggravating the temp sensor.

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