www.b50.org

BasilF

How well did it work?

BasilF

The alternator is 200watts I think so you can't use less than 16amps or it will blow if it ever has to charge a flat battery. It is normal to have the fuse on the non-earth side of the battery.

BasilF

I bought mine from Feked. It's cork and works fine.

https://www.feked.com/fuel-tank-cap-washer-21-2.html

BasilF

I think the spokes are a problem. Compared to your own old spokes the bend is well outside the hub. I think this will make the spokes less stiff and more prone to fatigue after a few miles. I got my spokes from the Devon Rim company and they fitted like your old ones. I'd get at least a set of speed...

BasilF

On the flip side, I haven't yet work out how to fit a means of adjusting tick-over. The pair of Mikuni VMs I had on a two stroke had the same idle adjustment as an Amal with a throttle stop screw acting on the slide and an air bleed screw for mixture control. I've considered putting a VM on my B50 ...

BasilF

Since the original flamboyant red fades so badly and the colour is so dependent on the thickness of the translucent red layer it seems unlikely that two parts from a couple of years apart will match anyway. Why not just get some paint from http://www.rsbikepaint.com/en-gb/shop-paints.php?colourschem...

BasilF

Stick a multimeter between the centre pin and the top connector. Resistor plugs will measure about 6kohms and non-resistor almost no resistance.

BasilF

Minety,
Can't see any connectors in the top picture. Are they on the other side. Did you use bullet connectors or something else?

BasilF

For what it is worth, in 2016 I bought a sad B25SS that had been stored for years. Here are all the pre-dismantling photos that show any wiring. From the metal wire ties used to hold the loome I think this might be the original wiring. Found_1acb90000-5d77d.jpg Found_4e7627000-5be3b.jpg Found_5dad63...

BasilF

Headlamp and main looms seem to be available but I think you're on your own for the electrical box loom. This might be because many people ditch the rectifier and zener diode so there isn't much demand for the standard loom. However you can get new spades that will fit in the headlamp loom socket an...

BasilF

Thanks. They have now gone into sent items and |I've had a reply.

BasilF

Should a successful private message appear in the Sent Items folder. Mine seem to end up in the Outbox and I don't think they have been sent.

BasilF

beat wrote: ↑Fri Nov 11, 2022 7:55 pm
HELPB50 wrote: ↑Thu Nov 10, 2022 5:37 pm If it pops and smoke comes out the carbs but doesn't start
it sounds for me as a to early ignition timing.

beat

Or the timing is 360degrees out, i.e. top of the exhaust stroke.

BasilF

Just bought some progressive rate fork springs. I don't suppose it makes much difference but should I fit them with the fine coils at the top or the bottom. Seems to me that fine coils at the top would give slightly lower unsprung weight.

BasilF

OK. I was assuming that the modern rec/regs were Open-Type (also known as Series-Type) SCR Regulator/Rectifier. I hope mine is as I have an LED headlight and rarely ride at night.

BasilF

It is a moot point A permanent magnet alternator will always generate power while the rotor is spinning The Watts of energy will be the same regardless of weather the excess power is converted to heat by the Zenner or is converted to heat by the stator itself Not sure I agree with this. A permanent...

BasilF

Doesn't the TR5 have two contact breaker points and two condensers? So you can only eliminate the left hand ones.

BasilF

Any lithium battery used on a motorcycle should have a BMS (battery management system) built in. The JMS battery I recommended simply needs a charging system limited to 14.9 volts and the BMS will control the charge and Ballance the cells.

BasilF

I've got a Pazon Surefire on mine and it has never kicked back. The manufacturers web site has the following note about installing it on big BSA singles; "Important note for owners of big single/high compression models (e.g. B44/B441/B50): The Sure Fire system requires a minimum cranking speed befor...

BasilF

Bleeding worked best for me with the wheel removed from the bike and on it's side with the bleed nipples up.

BasilF

When they come in. I am thinking about making a plaster cast and filling it with Silicone chalking and see how hard it sets up to. It may be hard enough to work. Jeff Bumper9.jpg I've used this product and the softer version for making rubber type parts. ://www.easycomposites.co.uk/xencast-px60-med...

BasilF

I think that's an OIF A65 centre stand. The pedal stops the side stand from working but you can cut it off and replace it with a small stub lower down the leg.

BasilF

Ian, If the standard plates are only mild steel (Material: 14 swg M.S. pressing) then it is difficult to imagine that even the worst Chinese copies could be much weaker. Have you checked that your cush drive rubbers are OK as if these have failed then the impacts when going from over run to drive co...

BasilF

Were the tabs sheared off with the bits in the bottom of the chain case or were they reduced to powder?

BasilF

There doesn't seem much difference in price between the 3/8UNF that I used and the M10. The BSF stuff that the slave cylinders used originally is expensive. I used UNF because I was worried that my head might explode if I used M10 on BSA.

Hope conversion goes well.

BasilF

I think the collars were fitted to some machines with two grease nipples as shown to try to direct grease into the bearings. Other swinging arms had a central grease nipple and had to fill the whole swinging arm tube before grease got into the bearings.

BasilF

Nice long brake arms!

BasilF

You can't do better than refer to the Rupert Ratio book 2 "Everything but the engine". It's got all the variations and many of the reasons behind then. The rear brake lever went down but there was a demand for a longer lever which would hit the swinging arm if it went down so new lever that went up ...

BasilF

Side stand looks about right to me.

But if the frame bracket isn't bent and the stand is straight then it will stay upright without a block of wood (for a while).

BasilF

Thank you for that, I wanted to show others where I located the unit if they were wondering where to put it themselves. Perhaps you or another member could explain me what happens when those 2 alternator wires are reversed.? If its a single phase alternator with just two output wires then reversing...

BasilF

Have you bought the pair? Would be interested in the left on if you only need the right one.

BasilF

I've bought a new B50 project which is tatty but fairly complete. I'm missing a left side cover (over air filter) and a left footrest. If any one has one one for a reasonable price please contact me. It was sent over from USA with two right footrests so a swap is possible. s-l400.jpg IMG_20210817_18...

BasilF

Wow - that does really pop! Did you paint wheel hubs and the license plate holder the same silver? Which color? Licence plate holder is black. Hubs, rear light and grab rail were painted with rattle cans from the local car parts shop. Etch primer, aluminium paint, clear lacquer. Paintcolours.jpg

BasilF

It gave me a proper candy finish like the original but is hopefully much more modern (and better) paint. Acrylic enamel plus clear coat won't have the same sparkle.

BasilF

I got my candy red from https://www.rsbikepaint.com/en-us/colours.php It needs 3 layers, metallic silver base coat, transluecent red lacquer followed by 2 pack clear lacquer. The final 2 pack layers are the only ones that are fuel proof so make sure you spray it everywhere. The final colour is effec...

BasilF

Does anyone know what color the license plate bracket should be? I repainted it 40 years ago with bright silver metallic - looked good, but can't recall what color it was at the time - was it the same as the wheel hubs? https://www.ebay.co.uk/itm/294186941278?hash=item447ee87b5e:g:tSIAAOSwC2hgp839 ...

BasilF

IMG_20210524_092528_1[1].jpg Another thing I found in this last breakdown. Have the slots in Dzus fasteners got narrower or are UK decimal coins thicker than old coins? Either way none of my coins would fit in the Dzuz fastener slot so I needed a screw driver to open the side panel to get at the to...

BasilF

I'd love to see details of how you made the chain guard.

BasilF

Didn't have long to wait to try out the trailer. Rode to my gliding club yesterday and about half an hour after parking a friend comes over and says, "Typical. There's an old BSA parked outside the clubhouse dripping a big pool of oil onto the ground". Fortunately it wasn't oil. The O ring in the ri...

BasilF

Yes. I have short and medium made by BSA and they both give crap braking so I thought I'd make some really long ones. Haven't tried them yet and they are unlikely to tempt me away from my hydraulic brake.

The grill looks too well make to be a one-off but I've also never seen one before.

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