Fork Oil - change frequency?

[Bonez]

Great advice here that I will follow for the next time I do my seals. Cheers Bonez.

Credit where credits due. I got that tip from some engineer friends I ride with. Take the old seal in or the seals measurements.

[geoffm]

There's a drain hole at the bottoms of the forks?
Bugger me, that would make it easier. I must look tonight when I do my seals.

/anorak mode on
Not always - the 1980 model RD350LC (the first year) didn't have drain plugs but they were introduced the following year.