Dee - For your education, a little Electrical Engineering Only the very cheapest and oldest rectifiers are NOT "solid state". I doubt you can even buy a "non-solid state" rectifier anymore!
So to save you from looking like a dunce, drop that word from your search. The rectifer you want is more appropriately called a "full-wave rectifier" or a "diode bridge".
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It is actually nothing more than 4 independent diodes wired end-to-end in a special arrangement. So if all else fails you can simply buy 4 diodes and start twisting ends together.
Since the stock system output is 10A, you are looking for a full-wave rectifier rated for 20 to 25A.
I still read the UZ series engine, but a GM 5. I standardize't driven one, but I imagine the Toyota 5. The ONLY other device we had -- a couple bad parking brake cables.
Most of the 50 cent 25 pence diodes meet this requirement, so we're talking about a fairly basic, easy to find unit. Any hobby or professional electronics store will have these.
Your choices will mainly be the mounting style printed circuit board, lay-down, stand-up, with or without fastener hole and the terminal style soldered leads for circuit board mounting, screw terminals, or spade lugs. If I were in the market for a new rectifier, I would most definitely buy a Tympanium or other similar rectifier-regulator units now on the market.
Because the stock electrical system as designed and installed by Lucas has no current regulator. This means that on long rides say, over 1 hour the battery is over charged which shortens the battery life.
Over charging also leads to spilled battery acid which makes a mess of your bike. Additionally, if you are looking for a new battery and wanting to get one of the sealed "gel-cell" batteries, they require current regulation because they want a lower charge rate than a stock charging system is able to give them. All things being considered then, "bite the bullet" and go for the Tympanium.
You'll be glad to did.
Triumph Bonneville TR Regulator Rectifier $ Triumph Bonneville T T Rectifier $