Problems on last weekends ride. Fuses and swingarm

[NicoNZ]

Had an overnight trip planned and set off on the ST4s all loaded up. Stopped at work on the way and it would not start again. No further details, its not a guzzi 

Took the panniers off and managed to get a lift home and quickly set up the Cafe Sport with pack rack and pack. loaded everything in and checked tire pressures. Hadn't been run in 4 months.

Fired right up and off I went. On the return journey home about 200 miles to go it would not start. Diagnosed to the ignition 15 amp fuse blown. Could be a long story but will keep it short. I noticed that the right side swingarm shaft had unwound itself about 8 turns but the lock nut was still there. Wound it in and once mildly tight backed it off about 1/8th turn and locked it up. The rearmost fuse had a 15 amp fuse so swapped that out and was good to go. 

The rearmost fuse holder looks to be a spare so makes me wonder why it had a 15 amp fuse in there. No mods to the bike that would require its use.

Two questions.

Is it reasonable that the way I screwed the swingarm bolt/shaft back in is good to go and needs no further attention? I did change the bearings a couple of years ago and must not have locked this up properly. I replicated the dimensions of the thread distance from the porkchop when reinstalling at the time.

Is the 15 amp fuse that blew a regular thing that happens? It must have happened when I turned off the bike. if it is then I have to buy some Spares! I did stop and buy a pack of assorted spares as a precaution. the rest of the ride home was uneventful apart from one of the rear seat cover screws disappeared. 

 

[Lucky Phil]

3 hours ago, NicoNZ said:

Had an overnight trip planned and set off on the ST4s all loaded up. Stopped at work on the way and it would not start again. No further details, its not a guzzi 

Took the panniers off and managed to get a lift home and quickly set up the Cafe Sport with pack rack and pack. loaded everything in and checked tire pressures. Hadn't been run in 4 months.

Fired right up and off I went. On the return journey home about 200 miles to go it would not start. Diagnosed to the ignition 15 amp fuse blown. Could be a long story but will keep it short. I noticed that the right side swingarm shaft had unwound itself about 8 turns but the lock nut was still there. Wound it in and once mildly tight backed it off about 1/8th turn and locked it up. The rearmost fuse had a 15 amp fuse so swapped that out and was good to go. 

The rearmost fuse holder looks to be a spare so makes me wonder why it had a 15 amp fuse in there. No mods to the bike that would require its use.

Two questions.

Is it reasonable that the way I screwed the swingarm bolt/shaft back in is good to go and needs no further attention? I did change the bearings a couple of years ago and must not have locked this up properly. I replicated the dimensions of the thread distance from the porkchop when reinstalling at the time.

Is the 15 amp fuse that blew a regular thing that happens? It must have happened when I turned off the bike. if it is then I have to buy some Spares! I did stop and buy a pack of assorted spares as a precaution. the rest of the ride home was uneventful apart from one of the rear seat cover screws disappeared. 

 

The ignition fuse should be a 10 amp fuse not a 15 amp. The end fuse holder isn't used in the electrical system so it's a spare. To tighten the swing arm pivot bolt you should tighten it till it bottoms out and add maybe an 1/10th of a turn. You want a little pre load on the bearings so the inner race doesnt turn on the pin. Those swing arm bearing are usually pretty tight to turn insitu even when new.

Phil

Edited 10 hours ago by Lucky Phil

[docc]

Counting from the front of the fuse block, which fuse blew?