PM sent, I also have a B31 Plunger but haven't had any problems with the gearbox yet.

Definitely invest in good Whitworth sets and spanners first.

When torqueing down a bolt, either with a torque wrench or by feel, if the thread is lubricated by any means (such as anti-seize) the force needed will be much less than for a dry thread.

Reasoning behind this is that the friction in a dry thread will resist movement and so for the same "pulling" force on the bolt a much higher force is needed. If you use the dry number on a lubricated thread you run the risk of snapping the bolt or damaging components.

After the engine and gearbox were done I finally took a look at the bike.

Fortunately, almost all the parts were there so what I actually needed to find was very little. Most of the parts I had to order from the UK but fortunately they weren't many and shipping was surprisingly not too expensive (although one order did get lost in the mail). It's amazing how modern technology has helped to make finding parts for these old machines so easy, in fact I think maybe even easier than for my modern car!

I had access to sandblasting, so pretty much everything including the wheel spokes got that done (that was NOT fun); and chroming here is very inexpensive so all of the original parts were rechromed.

The fuel tank was by a long shot the hardest thing to do, and if I were to do it again I'd definitely buy a new one instead, if anyone has any experience with the Indian ones on EBay please let me know if they're good. A rat had been living inside of it so it had lots of corrosion and holes which were a pain to fix. The result looks OK but the metal is probably very thin on several places (has a good thick plastic coating inside, don't remember the name of it at the moment) and under the rubber caps the chrome looks very bad but for the moment that'll do.

On the electrical side, the original loom was burnt so I was fearing the worst. Ordered a new loom from the US which had different color coding from the diagram I had on hand but surprisingly once connected everything worked, even the original regulator and brake light switch (which had spiders living inside).

Next step is paperwork, since it hasn't been on the road since probably the late 70's there are a lot of hoops to jump through.

Hello everyone, and greetings from Guatemala, this is my first post.

Decided to share some pictures of the 1955 B31 I just finished restoring. My father bought this motorcycle back in the 80's and had it lying around in a shed until a couple of years ago when I decided to bring it back to life.