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Fork irregularities

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philward:
I felt the same about my rebuilt 500 and subsequently used K2-K6's recommendation - much improved after the forks have warmed up after a few miles

Orcade-Ian:
Found a bit of spare time this morning, so checked the stanchions for truth and all seems fine.  I removed the top cap and made a 28mm i/d alloy washer to sit on the top yoke and screwed the cap back in.  Slackened both pinch bolts on one leg, then rotated the stanchion using the top cap hex - nothing binding and no oscillation of the slider. Repeated for the other leg with same result.  OK, not a perfect test but as good as I could get without a full strip.  Refilled with 2.5 weight Putoline oil and went for a 25 mile ride - much nicer feel but still not quite as good as my 350/4.  Still using the front tyre it came with which could be rather old and 'wooden', so will change that after the riding season.

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A bit misty today in all the heat, this is on the Hillside road over Birsay Moor.

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A Male Hen Harrier flew past closer than normal and quite a few wheatears around - phone was still being booted up - bugger!

Ian

K2-K6:
Encouraging on both counts, straight stanchions and at least a noticeable shift in movement from oil spec change.

Along with the tire consideration, has it much in the way of measurable "sag" on the fork ? Conventionally static fully extended (on centre stand) measurement of exposed stanchion vs just sat down without bouncing it.

You can't put an O-ring on the stanchion with the gaiters to check easily.

Thinking along the lines of.....if there's much static sag it may be sitting with the initial progressive wound spring movement already compressed a little too much to feel soft.

Orcade-Ian:
Good point about the initial sag - I can tape a 2ft steel rule to the slider and check from a suitable reference point on the bottom yoke (pinch bolt centre perhaps). The springs were well in spec lengthwise but may not be the original poundage if the PO was a 'large all American boy' (can I say that?). I don't suppose originals are available anywhere, I wonder if anyone has experience of aftermarket ones if that proves necessary?  I think I can live with it now for this season.  Thanks for your input - much appreciated!

Ian

taysidedragon:

--- Quote from: Orcade-Ian on June 14, 2023, 07:42:58 AM ---Good point about the initial sag - I can tape a 2ft steel rule to the slider and check from a suitable reference point on the bottom yoke (pinch bolt centre perhaps). The springs were well in spec lengthwise but may not be the original poundage if the PO was a 'large all American boy' (can I say that?). I don't suppose originals are available anywhere, I wonder if anyone has experience of aftermarket ones if that proves necessary?  I think I can live with it now for this season.  Thanks for your input - much appreciated!

Ian

--- End quote ---

Put a nylon zip tie around the fork leg, just tight enough to remain in position after the forks have moved. Use that position to measure your sag.

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