Pre-Unit A Group
| Pre-unit A Group When rebuilding the bottom end of an BSA twin or other engine with a plain timing side bearing we strongly recommend that the bushes are fitted to the crankcases and then ‘line bored’. This will ensure that they are in perfect alignment with the drive side main bearings, resulting in a perfect bottom end that will last many thousands of miles. Most automotive machine shops should be able to do this for you. Our timing side bushes are manufactured in the UK to a high standard and are made slightly undersize for finish machining once fitted. | ||||
Part No | Description | Per | Model | Years |
Crankcases | Crankcases BA10, CA10, DA10, ZA10, XA7 | 1 | Various | |
01-4606 | Bolt for breather pipe (see 25-7151 for nut) | 1 | A | 1950-62 |
02-0049 | Tie stud nut | 8 | A Plun | 1947-57 |
02-0049 | Tie stud nut | 9 | A S’arm | 1954-62 |
02-0051 | Sump plate nut | 4 | A | 1947-62 |
02-0833 | Dynamo strap nut | 1 | A | 1947-62 |
02-2395 | Fixing stud nut inside crankcase | 1 | A | 1947-59 |
21-5104 | Gearbox stud nut | 2 | A Plun | 1947-57 |
24-5160 | Magneto fixing nut | 2 | A | 1947-62 |
25-7151 | Nut for 1-4606 | 1 | A | 1950-62 |
29-0541 | Sump plate shake proof washer | 4 | A | 1947-62 |
29-2203 | Dynamo strap eye bolt | 2 | A | 1947-62 |
29-4101 | Tie stud, bottom rear | 1 | A Plun | 1947-57 |
29-4101 | Tie stud, bottom | 2 | A S’arm | 1954-62 |
29-4662 | Dynamo strap saddle washer | 2 | A | 1947-62 |
31-0222 | Sump plate stud | 4 | A | 1947-62 |
35-4005 | Stud, lower gearbox fixing | 2 | A | 1947-57 |
35-4005Q | Stud, lower gearbox fixing – stainless steel | 2 | A | 1947-57 |
36-0382 | Tie stud shake proof washer | 7 | A Plun | 1947-57 |
36-0382 | Tie stud shake proof washer | 9 | A S’arm | 1954-62 |
36-0382 | Magneto fixing shake proof washer | 3 | A | 1947-62 |
65-2352 | Dynamo strap trunnion | 1 | A | 1947-62 |
66-4707 | Oil pipe union shake proof washer | 1 | A Plun | 1947-57 |
66-4707 | Gearbox fixing shake proof washer | 4 | A Plun | 1947-57 |
67-0074 | Cylinder base stud | 9 | A10/SF/RR | 1950-57 |
67-0074 | Cylinder base stud | 8/9 | A7/ST/SS | 1947-62 |
67-0074 | Fixing stud inside crankcase | 1 | A | 1947-59 |
67-0340 | Scavenge pipe | 1 | A Plun | 1947-57 |
67-0352 | Crankcase tie stud, front | 2 | A Plun | 1947-57 |
67-0352 | Crankcase tie stud, front | 4 | A S’arm | 1954-62 |
67-0353 | Dynamo strap stud in crankcase | 2 | A | 1950-62 |
67-0355 | Crankcase tie stud, upper rear | 1 | A | 1950-62 |
67-0648 | Main bearing, timing side, std | 1 | A | 1947-57 |
67-0670 | Main roller bearing, drive side | 1 | A | 1950-62 |
67-0671 | Drive side bearing shim set 0.05″ | AR | A | 1950-62 |
67-0672 | Drive side bearing shim set 0.10″ | AR | A | 1950-62 |
67-0674 | Oil seal, crankshaft | 1 | A | 1954-62 |
67-0787 | Main bearing, timing side, -.020″, now bore to suit | 1 | A | 1947-62 |
67-0790 | Main bearing, timing side, std, now bore to suit | 1 | A | 1958-62 |
67-0799 | Main bearing, timing side, -.010″, now bore to suit | 1 | A | 1947-62 |
67-0800 | Main bearing, timing side, -.030″, now bore to suit | 1 | A | 1947-62 |
67-0801 | Main bearing, timing side, -.040″, now bore to suit | 1 | A | 1947-62 |
67-0922 | Breather pipe | 1 | A | 1950-62 |
67-1214 | Cylinder base stud | 9 | A10/SR/S | 1958-62 |
67-1235 | Crankcase joining stud, rear | 2 | A Plun | 1947-57 |
67-1236 | Crankcase dowl | 1 | A7/10 | 1950-62 |
67-1240 | Main ball bearing, drive side (can use 67-670) | 1 | A7/ST | 1947-50 |
67-1242 | Oil seal in primary case | 1 | A Plun | 1947-57 |
67-1243 | Oil seal washer in primary case | 1 | A Plun | 1947-57 |
67-1245 | Magneto fixing stud | 3 | A | 1947-62 |
67-1259 | Magneto bolt, long lower | 1 | A | 1947-62 |
67-1285 | Sump plate kit, steel | 1 | A | 1948-62 |
67-1285A | Alloy sump plate with gauze & drain plug | 1 | A | 1948-62 |
67-1400 | Anti drain valve spring above timing side bush | 1 | A | 1947-62 |
67-1401 | Anti-drain valve grub screw inside c/case | 1 | A | 1947-62 |
67-1461 | Oil pipe union with pipes | 1 | A Rig/Plun | 1947-57 |
67-1496 | Oil pressure relief valve spring | 1 | A | 1947-62 |
67-1498 | Oil release valve plug fibre washer | 1 | A | 1947-62 |
67-1499 | Oil release valve fibre washer | 1 | A | 1947-62 |
67-1505 | Oil pressure relief valve plug | 1 | A | 1947-65 |
67-1876 | Dynamo strap | 1 | A | 1947-63 |
67-1878 | Dynamo strap stud | 2 | A | 1947-50 |
71-1126 | Sump filter (can be used to replace old gauze) | 1 | A | 1947-62 |
10330-54/50 | Main bearing, timing side, -.050″ | 1 | A | 1947-62 |
S9-2 | Anti drain valve ball | 1 | A | 1947-62 |
S9-3 | Oil pressure relief valve ball | 1 | A | 1947-62 |
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