Popped into local dealer today to order some bits, and he as a pair of oil filters in for Yam XS650 that somebody ordered and never collected. If anybodies interested he'll do them at cost approx $75 - 80 a good $40 saving on retail. If your interested pop me a PM.
They are just a sieve to strain out bearing cages and gear teeth.Mine all had holes in them...just a little larger than the holes already there.