Silver Streak

[ianw1]

Thanks Rob, I removed the mag sprocket with a small 2 legged puller. Is it recomended to replace the timing chain?

[Rob Harknett]

Thinking about changing the mag chain, in 64 years I have never replaced a mag or dynamo chain. They are not under the strain a primary or rear chain is.

[ianw1]

Thank you again Rob.

[ianw1]

Hi Dave, sorry not to have come back to you sooner, I've only just removed the front wheel.
The outside diameter of the brake plate is 6" & the diameter of the brake shoes is 5 1/2".
There is nothing within the hub to drive a speedo gearbox, the centre wheel bearing housing does have a thread on the outside.
There is a plug in the front of the brake plate where I think the speedo gearbox would sit but there doesn't seem the space on the rear with the brake shoes being so close to the "hole".
I think my engine gearbox is a Burman Type CP as the engine number finishes with an "A"?

[Rob Harknett]

You must have the wrong front wheel. 1938 had front wheel with speedo drive. The bike will need a speedo to be road legal.

[ianw1]

Thanks Rob. While trawling the net for pics of Silver Streaks I've seen quite a few of them without speedos fitted.
The brake plate I have has the hole where I think the speedo gearbox would sit which has a blank plug in it. On the brake shoe side there just does not seem the space for any speedo drive given the close proximity of the shoes to the hole?

[dave16mct]

My '38 model 26 had a slim gear which screwed onto that boss at the back of the hub. The speedo drive threaded into the boss on the brakeplate . It had a small gear which was fixed with a pin to the shaft of the speedo drive. I don't know anyone with this set-up you could ask for pictures which would help. They do come up on ebay occasionally but the gears have to have the correct ratio to mesh properly. I think your gearbox is a later, smooth type HP1. Sorry I can't be of more help.
Dave.

[ianw1]

Thank you Dave.

[Rob Harknett]

Thanks Rob. While trawling the net for pics of Silver Streaks I've seen quite a few of them without speedos fitted.
The brake plate I have has the hole where I think the speedo gearbox would sit which has a blank plug in it. On the brake shoe side there just does not seem the space for any speedo drive given the close proximity of the shoes to the hole?

A 350 registered after July 1937 would need a speedo. I got stopped by police in 1957 on my 37/26. They wanted to nic me for no speedo. I told them the bike was registered before July 1937. They followed me home to look at my log book.

[ianw1]

Thanks Rob, I think the easiest thing for me to do is to fit a GPS speedometer, not very inkeeping with the age of the bike but it will keep it legal & I can remove it.