fork seals

dougi · Post by **dougi** » 12 Aug 2008 10:47

can anyone tell me the sizes of fork seals for my 1978 3-1/2 sport. if i have the sizes i may be able to find them locally from a seal/bearing company

Post by **SteveMRC** » 12 Aug 2008 12:43

Sorry, can't help you with the size. I ordered ones for my 500 from NLM.

You may be surprised to find you need 4 seals, or at least my 500 did. 2 per leg stacked above each other.

I don't know if 2 per side is really necessary nowadays. Are seals better made now so that one per side will work ? Also 2 must increase the fork stiction.

3narf · Post by **3narf** » 12 Aug 2008 13:50

I've got the number written down in my garage somewhere- are you in a hurry? You may be able to see the number if you pull the weather seal up.

www.rswww.com (co.uk?) is where I get them.

dougi · Post by **dougi** » 12 Aug 2008 15:16

thanks. there is no hurry

hendre · Post by **hendre** » 12 Aug 2008 18:25

Hi, the standard size is 35 x 47 x 7 and indeed you need two per leg.

Hermy in the US once supplied me with "Leak Proof Fork Seals" 35 x 47 x 10.5, they include a filler ring to make up for the missing 3.5 mm.

AndrÃ©

dougi · Post by **dougi** » 12 Aug 2008 18:57

thats great thank you

EVguru · Post by **EVguru** » 12 Aug 2008 19:00

Remember that these are hydraulic seals, not rotary shaft seals.

dougi · Post by **dougi** » 13 Aug 2008 06:27

thank i thought it was a rotary shaft seal