NEWS FLASH - December 2013
We are now selling magneto bearings, insulators, oil seals and armature shims from our on-line shop.

Brightspark Magnetos

NEW ... Take a look at some of the equipment we use in our workshop for magneto servicing and overhauls.

 

 

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Downloads

We have a number of useful files, all for free, to help you with magneto related tasks. Some of them contain the sort of stuff that's invaluable when you are working on your magneto on a Saturday afternoon, and you need to have the bike running for a Sunday run. So, even if you don't need anything right now, bookmark this page.

Gaskets

Gasket pattern for mounting flange of Lucas K1F, K2F, KVF magneto

Print on paper, card, or gasket material. Cut around outline and cut out holes.

 

Download

Shims

Pattern for shim between ring cam housing and main housing of Lucas K1F, K2F, KVF magneto

Print on strong paper or card, preferably reinforced or plasticised, such as Tyvek® envelope material. Cut around outline and cut out holes. These are delicate. You will need to take care.

 

Download

Pattern for shim between ring cam housing and main housing of Lucas K2FC magneto

-- ditto --

 

Download

Bearing Insulators

Insulator patterns for E15, E18 and N3048 bearings, all on one sheet

Print on strong paper or card, preferably reinforced or plasticised, such as Tyvek® envelope material. Cut around outline and cut out hole.

 

Download

Tools

Drawings of pullers for inner race of bearing at CB end and for slip ring - Lucas K1F, K2F & KVF

You will need a lathe, some pieces of aluminium plate, some M4 screws or studding, nuts and washers and an M6 or M8 tap and screw.

 

Download

Timing discs

Each of our timing disc files contains clockwise and anti-clockwise versions of the timing disc. If your printer can do it, you can print the timing discs straight onto card, cut around the outline and cut out the hole. Alternatively you can print on paper, and then stick the paper to a sheet of card or laminate it.

All timing discs are 180mm diameter with one degree graduations, clearly marked every 10 degrees with the angle and, usefully, whether it is before or after TDC or BDC. The timing discs are for use on the crankshaft, not on any half-time shafts. Other than the 'generic' disc, all discs are marked with the valve opening and closing angles and ignition angles as stated.

Make

Cam

Motorcycles

Valve angles marked on disc

Checking clearances

Ignition angles marked on disc

Notes

 

Adv'd

Ret'd

Generic

n/a

All

-

-

-

-

Includes compression ratio and cylinder packing graphs

Download

Velocette

M17/5

Later sprung MAC

30°-60°-60°-30°

0.030"

38°

14°

 

Download

M17/7

Sprung MSS; Viper to engine no. 1261

19°-49°-49°-19°

0.030"

36°

12°

 

Download

M17/6 &
M17/8

Viper from engine no. 1262; Venom; Thruxton

55°-65°-75°-45°

0.030"

38°

14°

Method 1 for M17/8

Download

45°-55°-65°-35°

0.053" in.; 0.052" ex.

38°

14°

Method 2 for M17/8

Download

 

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