My XT660Z was stored for 2 months, front right caliper (Brembo) seized on. Piston would not return even using a C-clamp. Usual process then is remove pistons, new seals, new fluid, bleed system.

However, bikes dealers do not have a part number for seals because Yamaha say it is a non serviceable item (!!!) What the....? Needs a new caliper at a whopping 209 GBP. Luckily they agreed to do it under warranty (bike booked in for June when I return to UK).

Anyone else have problems like this? Is there a way of self servicing these calipers (ie is the seal kit available as if buying for a different model? cos I need to get some spares)

Trip to central Asia planned... don't expect to find too many friendly neighbourhood Yamaha dealers in the Turkmeni scrub lands!!