Not my bike but if anyone could poss steer us in the right direction that would be great.

The tail light fuse keeps blowing, when it blows it runs bad like its missing on cylinders, I believe it happened first when out riding & he braked. A fuse was found to be blown, replaced & it failed again after a ride. Nothing obvious with loose wires when the rear cowling is off, are there any common places to check for dodgy earths, crushed wires etc etc as things point to a dodgy earth I,d imagine (but could of course be totally wrong), thanks in advance chaps.

That fuse looks after the dash too mate and if it blows you are on for limp home mode on 2 cylinders.

COuld be up the front of the bike - has he recently tried to put a resistor in it to take out the 112mph restriction? Could have bodged it and this is blowing the fuses...

Mark, just rang the fella he thinks he,s sorted, found a dodgy tail bulb, it worked in a manner of speaking but was earthing bad, took it out & all is well, fingers crossed.

Thanks again mate as always.