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Helping keep British Motorcycles on the road for over 30 years - established 1977


SRM Special Products      Available From BCS
                                          Visit SRM in Wales!

Please note, these items are only part of the full SRM range, with many more items expected to arrive and be stocked in North America as new batches are made. An SRM to BCS part number conversion is under preparation, but enquiries can be made for any items either under BSA or SRM part numbers, and any out of stock items will be advised on upon delivery. At present, we have no delivery date on arrival of the SRM big bore kits or stroker cranks for BSA, nor are we handling any of SRM's machining or mechanical services, which must be arranged directly with them at this time.

423-01/A - SRM Steering Head Taper Bearing Set for BSA A and B Models
42-0071/A - Nut, Cush Hub, Heavy Duty SRM
65-1544/A - Oiline, Rockers, Billet, PU 1CYL, SRM
67-0263/A - Covers, Valve Insp, A7/10, Finned, SRM
461-07 - SRM 750 Big Bore Kit for BSA A65

SRM's BSA A65 and A10 High Delivery Oil Pumps 
BILLET DURAL HIGH DELIVERY OIL PUMP FOR BSA TWINS
Made to very high tolerances, these high delivery oilpumps 
are suitable as a direct replacement for the original pump.
The pumps are a replacement for BSA A7, A10, A50 and A65,
and come complete with rev drive as standard. CNC machined from
Dural alloy, these pumps will help eliminate wet sumping and
any need to fit after market inline non return valves.
Complete with hardware, gasket and instructions.
A50/A65 Oil Pump - Use BCS Part #71-2413/B
A7/A10 Oil Pump - Use BCS Part #42-0155/A

Click here for more information

 


67-0642 BSA SRM A7/A10 Crankshaft Worm Drive Gear
Whenever your main bush wears or you have it replaced, the chances are that the worm gear pinion has worn too. This pinion will also wear the worm drive on the oil pump. So when changing your old pump for one of our new items, be sure to renew the crank pinion at the same time – ensuring a matched pair of gears. You know it makes sense!!

 


68-0050 BSA SRM A50/A65 Crankshaft Worm Drive Gear

 


BCS Part #331-30
Boyer Micropower K2F Magneto Conversion Kit
SRM_MAGKIT-1
Click here for instructions (pdf)

 

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BCS Part #331-35
Boyer Micropower Magdyno Conversion Kit 
SRM_MAGKIT-2
Click here for instructions (pdf)

 

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Stainless Steel Cycle Thread Nuts
made in high quality 303 stainless steel, full 
depth hex - 1/4, 5/16, 3/8"
Use BCS Part #415-1426/SS - 1/4" x 26 tpi CEI Stainless 
Use BCS Part #415-51626/SS - 5/16" x 26 tpi CEI Stainless 
Use BCS Part #415-3826/SS - 3/8" x 26 tpi CEI Stainless 

 

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21-0692/SS Stainless Steel 3/8" UNF 12 Point Cylinder Base Nuts: 
10 for Triples, 8 for 650 Triumph Twins, 4 for Triumph 750 Twins
Used after engine # DU75452 (mid 1968) for Triumph 650, 
and mid 68 Triumph 500, 1970 on BSA A50/65

   

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Use BCS Part # 65-2611/A (SRMSF2) - Sump Filter Kit for BSA Pre-Unit Singles:
CNC machined billet with stainless steel drain plug with integral magnet, gauze plate, gaskets and stainless steel fixing bolts. The drain bolt makes oil changes easier and quicker,the magnet collects cast iron and steel deposits making the oil cleaner and helps prolong engine life.
Click here for sump plate installation instructions. (pdf) 

 

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Use BCS Part #70-8064/B (SRMSF1) - Sump Filter Kit for BSA A10, A7, A50 & A65: CNC machined billet with stainless steel drain plug with integral magnet, gauze plate, gaskets and stainless steel fixing bolts. The drain bolt makes oil changes easier and quicker,the magnet collects cast iron and steel deposits making the oil cleaner and helps prolong engine life. 

Click here for sump plate installation instructions. (pdf)

 


BCS Part #70-8064/C (SRMSF3) - Sump Filter Kit for BSA Unit Singles: 
CNC machined billet with stainless steel drain plug with integral magnet, gauze plate, gaskets and stainless steel fixing bolts. The drain bolt makes oil changes easier and quicker, the magnet collects cast iron and steel deposits making the oil cleaner and helps prolong engine life. 

Click here for sump plate installation instructions.
(pdf)

 


BCS Part #65-2623 - Stainless Steel Sump Filter Gauze for BSA Pre-Unit Singles

 

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BCS Part #70-9979 - Sump Filter Gauze for BSA Unit Singles

 

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BCS Part #71-1126 - Stainless Steel Sump Filter Gauze for A7, A10, A50 & A65

 

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BCS 71-2369/SS (SRM 70-6595) Pressure Release Valve stainless steel 
T150/T160 - 75 psi

 

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SRM's Stainless steel CNC precision engineered pressure release valve,  
each one hand assembled and checked on a pressure jig to ensure correct seal and 
blow off pressure; the main problem with old PRV`s is the poor thread diameter,
some original BSA and Triumph valve were found to be 0.025" (0.63mm) undersize 
on the thread diameter, this allowed oil to bypass the valve to the blow off via 
the threads, this resulted in low oil pressure. Our valve helps eliminate this 
problem with the high accuracy of manufacture. 

Use BCS Part #71-3447/SS (SRM-71.2370) - fits BSA B44, B50, A7, A10, A50, A65 and Triumph 3TA, 5TA, T100, 6T, T110, T120, T140.

Click here for installation instructions.
(html)

 

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70-2795/SS SRM's Stainless steel button indicator pressure release valve with "telltale". Improved design as well as better material than original. They will work on all Triumph twins, and BSA unit twins, to give visual indication of oil pressure being OK. (Expected early 2009)

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SRM's Stainless steel CNC precision engineered Norton twins pressure release valve, each one hand assembled
and checked on a pressure jig to ensure correct seal and blow off pressure; the main problem with old PRV`s is the poor thread diameter, some  original Norton valves were found to be 0.025" (0.63mm) undersize on the thread diameter, this allowed oil to bypass the valve to the blow off via the threads, this resulted in low oil pressure. Our valve helps eliminate this problem with the high accuracy of manufacture.

Use BCS Part #06-6195/SS (SRM-06.6195A) - fits NORTON TWINS from '59 to '76.

Pease check that your timing cover is the correct type to use this large pressure  
valve, as old bikes can sometimes have wrong parts fitted through their lifetime.

Click here for installation instructions. (html)

 

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Alloy Clutch Pressure Plate Kits:

SRMPP1 BSA/Triumph 3 spring models - Use BCS Part #57-2156/A 
SRMPP2 BSA A50 A65 & TRIUMPH 4 spring models - Use BCS Part #57-1466/A
SRMPP3 BSA pre-unit 4 spring - Use BCS Part #57-0986/A
SRMPP4 Triumph 3TA 5TA 3 spring - Use BCS Part #57-2156/C
SRMPP5 Triumph 3TA 5TA 4 spring - Use BCS Part #57-1466/B

Click here for instructions. (pdf)

 

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These are high quality taper roller bearings specially modified
for BSAs and 
Triumphs. These are a direct replacement for the
standard cup and cone ball race. 
The advantages of a roller bearing are:
improved handling; easier and fewer adjustments; and long life - up to 250,000 miles.
SRMTR1 BSA A & B range swing arm models - Use BCS Part #423-01/A
SRMTR5 BSA unit singles up to 1970
- Use BCS Part #423-02/A 

Conversion taper roller steering head bearings to convert A7, A10, A50 and 
A65 frames to take T140 Disc front end or
Conical hub type front end, also 
the same kit fits BSA
B44 and B25 to take Conical hub front end and 
T140
disc front end.
SRMTR8 T140 disc/conical forks to A10, A65, B25 & B44
- Use BCS Part #423-01/B

Click here for instructions. (pdf)


Other types on order.

 

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Rocker oil feed pipe CNC billet aluminium,
for BSA A7 and A10. A Stylish 
replacement for the old copper pipe (which always leaks!).
 
Use BCS Part #42-0048/A (SRM part number SRM-42.0048)

 

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T140 and T120 rocker oil feed pipe,
made from CNC billet machined aluminium,  
the T140 pipe has the larger union for the oil hose connection, the T120 has 
the smaller diameter oil hose connection. Improves the look of the engine, 
matching the fin look of the cylinder head and the rocker boxes.
Use BCS Part #71-3550/A T140 (SRM part number SRM-71.3350)
Use BCS Part #70-6349/A T120 (SRM part number SRM-70.6349)

 

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SRM'S BSA DBD32 DBD34 Rocker oil feed pipe CNC billet machined aluminium.
Use BCS Part #42-0046/A (SRM part number SRM-42.0046)

 

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BCS Part #67-0356 SRM A7, A10 & Super Rocket Forged Camshaft
No Nonsense - Expect the best: New range of BSA camshafts are a stamped 
forging to give more grain structure and durability. They are then precision 
CNC ground, and then induction furnace heat treated to the correct hardness, 
resulting in the best available stock camshafts on the market today.

 

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BCS Part #67-0332/0333/A New Cam Follower Set for the A7 and A10 models 
are high quality hardened material with a stellite pad on the contact 
surface that runs on the camshaft lobes - much like the later BSA A65 
and the Triumph twins.

 

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BCS Part #68-0473 SRM "Spitfire" Profile BSA A50 & A65 Forged Camshaft 
(for road use)
New range of BSA camshafts are a stamped forging to give more grain structure 
and durability. They are then precision CNC ground, and then induction furnace heat 
treated to the correct hardness, resulting in the best available stock camshafts on the
market today.
 
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BCS Part #68-0362 A50/A65 Cam Followers (sold each)

 

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