They should use the remote greasing kit which can be purchased from "the Nipple Company" ( this IS their real name!) Many of the dealers now stock it and will fit it too! I designed this kit and it means routine greasing can be done from within the engine compartment.
Before there is a cacophony of comment - you DO still need to get underneath every 6 months or so to check fasteners etc BUT it cuts down the fiddling about with grease nipples on the suspension and saves having to squirm about underneath when on tour!!
Cheers!
