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Topics - Gadorey

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Singles / Kick starter quadrant B31
« on: 21 June, 2022, 09:55:56 »
Hello everyone,

Does anyone have any experience with kick starter quadrants from India being sold on ebay (part No. 15-4121)?  are they any good, or are they poorly made?

I am also looking for an outer cover for my gearbox (part No. 66-3125 for a rigid frame B31/33), in case anybody has one available.


Pre War / Sloper S30-13 compression test
« on: 18 April, 2022, 18:26:09 »
Hi everyone,

Has anybody ever done a compression test on their 500cc OHV Sloper or on a similar 500cc BSA engine?  If so what values did you get.

I just tested my own Sloper and got 106psi with a warm engine, which sounds about right, but would like to have a comparison as reference.


Singles / 1946 B31 oil feed pipe in timing cover
« on: 17 February, 2022, 11:04:10 »
Hello everyone,

I need to replace the oil feed pipe (part nr 66-698) on the inside of the timing cover as the small pipe is broken off.

What is the best way to remove it? 

Thanks again for the help.


Singles / 1946 B31 - question on front hub
« on: 19 January, 2022, 08:05:27 »
It seems at some time in its live my 7” front hub was modified – instead of the spindle, spindle sleeve, spacers etc of the 7” hub with steel backplate (upper diagram), it has the spindle and sleeve of the later 8” hub (lower diagram).  At first I thought I might actually have a 8” hub, but measuring, it is indeed a 7” one.  The drum has a diameter of about 178mm or 7”.

Has anyone seen something like this?  Was this a combination I am not aware of or likely to be a modification done at some time during the bike’s life?


Singles / 1946 B31 - Steering head bearing (and some other parts)
« on: 18 January, 2022, 13:23:14 »
Hi everyone,

I am looking for a steering head bearing top cone part No. 65-5319.  The bearings on the 1946 B31 are different than the later ones (1" inner diameter), and were also used on Bantams.  Unfortunatetly I haven't been able to find one anywhere, and am hopping someone might have one lying around.  At the moment this small part is keeping me from coming further with the restoration. Alternatively, does anyone know of a suitable taper bearing that would fit? 

I am also looking for some further parts which are missing:
Front brake plate part No. 65-5895
Rear brake anchor strap part No. 65-6275
Front Engine Plate cover part No. 65-4431

...and a complete gearbox....  Mine is too far gone to try saving it (bike was found in very poor condition with water and mud inside...).  I would actually rather use the later gearbox introduced in 1948 as the parts for the early one are impossible to find.  I know the differences and would mmodify the later box to fit my 1946 bike.

So if anyone can help, I would be very grateful.  I am located in Germany.


Singles / B31 1946 steering stem
« on: 15 March, 2021, 07:26:44 »
Hello chaps,

Another question regarding the steering stem on my 1946 B3, as I'm sourcing missing parts.

According to the parts manual the steering stem adjusting sleeve has the part Nr. 65-5329 and the stem cap nut is 65-5330.
However, according to Draganfly these 2 parts are only used for 1946-48, and thereafter being replaced by 67-5023 and 67-5024 respectively.  Also, the ones available at Drags or other vendors are all the later part Nr.

So, does anyone know what the difference is? And if the later types fit the early 1946 steering stem or yoke?


Singles / B31 Gearbox
« on: 10 January, 2021, 16:13:48 »
Hi everyone,

I'm currently working on getting a 1946 B31 back to life.

The early B31's had a different gearbox to the later ones (after 1949, I believe) which became common with the M range.  I've had very little luck finding parts or indeed a complete gearbox for my bike.  Unfortunatetly the later gearbox does not fit the earlier frame as the distance between the plates increased.

My question is if the internals of the later box also changed, or if they could be used in the earlier cases.  Are the bearings, shafts, gears, etc the same, or is everything completely different?


Singles / B31 Steering head bearings
« on: 10 January, 2021, 16:07:11 »
Hi everyone,

I'm currently restoring a 1946 B31 on which I need to replace the head stock bearings.

On those early years the B31 head stock bearings had cups and cones with 3/16" ball bearings, like the C range, but later were changed to ones using 1/4" balls, which I think became common to the whole range of B, M, and A.

These early bearings, the cups and cones, are not available anywhere.  So my question is if the later type will fit if replaced as a set?


Singles / B31 engine
« on: 01 December, 2020, 08:46:38 »
Hi everyone,

Does anyone know if there are any differences between a 1946 XB... and a 1953 BB... engine?

I have a 1946 B31 with engine Nr XB31... which is in a very bad state.  Stood for ages in the rain with a half opened engine and everything that moves completely seized up.  Not far from me a 1953 BB31.. engine came up for sale in good condition and I'm considering buying it.  The idea would be to move all the internals to my cases in order to keep the original matching nrs on my bike, or just to forget about matching nrs and use the 1953 engine as a replacement.

As far as I know in 1953 the cylinder and head fin area was increased, but other than that I believe everything remained the same.  Can anyone please confirm or let me know what are the differences?

Many thanks,

Pre War / Sloper S30-13 performance issues
« on: 15 October, 2020, 10:44:35 »
Hello everyone,

I'm new to the forum so a short introduction.  I own a Sloper S30-13 which I restored three years ago. After a catastrophic failure of the old piston, I rebuilt the engine again - I redid the main bearing which was already quite worn, new piston, rings and pin, new small end bush, rebore, new valve guides and springs.  Amazing - after the rebuild she started on the first kick without complaints.

After an initial running in phase, I have now been doing tuning rides to see how she performs at top speed, but the results were somewhat disappointing.  She starts reliably on the first kick and settles in a stable idle, pulls very well, and accelerates up to 70-75km/h without any problems and can cruise at those speeds all day.  Beyond that it's a struggle.  After a very loooong straight at WOT she eventually reaches 80km/h and tops at about 85km/h.  After that there's nothing.

Since there are no signs of an ignition timing problem, I started experimenting with the needle setting on the carburettor. After trying all 5 needle positions, the best performance on mine seems to be on the third notch from the bottom.
However, none of the needle positions made a change on the top speed.  To be noted, at this top speed of 85km/h the engine doesn't seem to be struggling or being tortured - it just seems to not be able to increase the rpms beyond that.  So now I'm out of ideas and hoping for some pointers from the experts here in the forum.

My gearing is for solo work: engine 21t, g’box 19t and final drive 42t. Timing is set at TDC, fully retarded, fag paper just pulling out of the points. Carburetter is an Amal 6/024.  I also double checked that the slider and choke are closing and opening fully, which I can confirm.  After warming up, my choke lever can be anywhere between 3/4 and fully opened. If below that, there is a drop in performance, so the mixture also seems to be OK.

The only other "problem" I have since the rebuild is a somewhat large oil leak from the middle of the pushrod covers, where they telescope into each other. There is no seal there as far as I know.  Is this a known issue? and if so are there are any known cures?


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