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Good afternoon,does any one know the thread size on the damper rod ? thanks.

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Dominator  Front End

Steering Column Stem                        30026          13/16” x 26tpi

Fork Filler Plug                                    16998           1 1/8” x 20 tpi

Plug/Nut  Damper Rod Hole              B2/633              3/8” x 26 tpi

Steering Top & Bottom Nuts     15630 + 19490       13/16” x 26 tpi

Damper Steering Rod                         15801          5/16” x 26 tpi

Top Nut                                               19490         15/16” x 26 tpi

 Fork Mudguard  Stud                         T1085            1/4" x 26 tpi

 Some Mercury Forks parts have Commando UNF or UNC Threads

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Slider drain screw               485          ?????

Slider pinch stud and nut    16664+E3231      5/16x26

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Drain Screw: 1/4   26 TPI

So you could use BSF or Cycle. But I think cycle was original, but that's my guess.

I have just replaced the drain screw washer on my famous forum pre F/bed Model 50 after a puddle of oil from the left hand drain screw. Reason was the fibre washer had split.

My advise is a new washer with every fork oil change.

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.. give them a thin coat of wellseal as well as fibre washers seem harder these days.

 



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