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Messages - Ralf89

Pages: [1] 2
1
British Bikes / Re: Villiers 172cc brooklands engine?
« on: January 17, 2025, 02:29:43 PM »
Hi,
Ok, understood. Thank you very much anyway. You helped me a lot.
Last question:
Does anybody know if there is a possibility to get these oxford style exhaust cans?
Otherwise I try to build it myself.
Many thank's!
Regards
Ralf


2
British Bikes / Re: Villiers 172cc brooklands engine?
« on: January 16, 2025, 06:26:58 AM »
Hi
maybe you a right and the crankshaft is self made.
Can anybody estimate, how many brooklands engines were produced? Maybe the number of produced pieces was just too small to make a new forging mold?

The actual bore of the cylinder is approx. 57.7mm
Regards
Ralf


3
British Bikes / Re: Villiers 172cc brooklands engine?
« on: January 14, 2025, 05:45:56 PM »
Hi,
here are some data about the piston of my engine:
diameter of the gudgeon pin: 14.22mm
Overall length of the piston (from bottom end to very top of the deflector): approx. 96mm
distance between center of the gudgeon pin bore and the very end of the deflector: approx. 46mm
The VIIA conrod is approximately 7mm longer than the normal VIIIC conrod used in the standard T engines.
Cheers
Ralf

4
British Bikes / Re: Villiers 172cc brooklands engine?
« on: January 14, 2025, 07:24:10 AM »
My crankshaft it self is not full circle. Both halves are the same as the standard sport crankshaft, but between the crank and the counter weight there is a sheet metal and on this the aluminium padding riveted.
I don't know if this is a original brooklands crankshaft or just a professional modification of a normal crankshaft.
But there are no markings like "villiers sports" as on the normal sports crankshaft stamped on it.

5
British Bikes / Re: Villiers 172cc brooklands engine?
« on: January 13, 2025, 10:36:07 AM »
Sorry i have forgotten to answer your question. Yes the crankshaft is drilled for lubrication.
Cheers

6
British Bikes / Re: Villiers 172cc brooklands engine?
« on: January 13, 2025, 07:51:18 AM »
Thank you for your answers!

I am pretty sure, that this is the original brookland crankshaft. I have a copy of the No.22 part list and in here you can see a picture of this crankshaft, see attached photo.

The design inlet port is also mysterious to me.
I always tought, that the inlet port with the triangular edges on bottom of the port are the standard design and the complete rectangular design is made for tuning.
As an example i have two similar standard T cylinders tith different inlet ports. Now i was surprised, that the brooklands inlet port also thas the triangular edges.
Thanks
Ralf

7
British Bikes / Re: Villiers 172cc brooklands engine?
« on: January 11, 2025, 08:33:30 AM »
Hello and many thank's for your answer.
I fear I haven't understand your explaination about the difference of the head. The different head bolts are clear, because of the aluminium part of the brooklands cylinder. But how does this effect in a difference design of the head itselve? Is the height of the head (where the head bolt nuts are in place) different?

You are absolutely right, it is not so important to know the year. I just want to investigate the history of the engine. I heard the brooklands engine was only sold to racing teams and not to private persons. Is this true?
Does anybody know, if there are any remarkable differences in the geometry between the brooklands conrod and my VIIA conrod (except the weight)? A different length would result in different timing and compression ratio. Or my piston was specialy designed for this  con rod. Many speculations....

Many thanks in advance

8
British Bikes / Re: Villiers chain ?
« on: January 11, 2025, 07:49:28 AM »
Sorry for the late response.
I haven't test it yet because my bike is still a project and i hope i can finish it the next months so I can hopefully ride it the first time.
But for my opinion this little difference of aprx 0.5mm is neglibigle. We will see...
Regards

9
British Bikes / Re: Villiers 172cc brooklands engine?
« on: January 10, 2025, 03:39:19 PM »
Many thanks in advance

10
British Bikes / Re: Villiers 172cc brooklands engine?
« on: January 10, 2025, 03:38:21 PM »
More photos

11
British Bikes / Villiers 172cc brooklands engine?
« on: January 10, 2025, 03:37:12 PM »
Dear all,
I have this engine which looks like a mixture of different villiers parts. The cylinder is for my opinion a original brooklands. But the head also?
What is the difference to the tt head?
Furthermore the crankshaft should be also original brooklands. But the con rod is stamped with VIIA. According to the part list the brooklands engine should have a special con rod. Can someone confirm?
The crankcase is marked with T, so should be from a petrol standard sports engine. But all these parts are together for a very long time. Could it be possible, that this engine was built in this configuration? The engine number is 18xx, so it should be aprx 1925/1926?
Further photos will follow.
Many thanks in advance
Regards
Ralf

12
British Bikes / Re: Villiers chain ?
« on: December 18, 2024, 03:43:08 PM »
Hi
I had the same problem and finally found a satisfying solution for me.
In many german mopeds from the 60's and 70's where chains with the dimension 1/2x 5,2x 8,5 used (sometimes 1/2x5,4x8,5). The two numbers are in millimeter.
These kind of chains are still easy available in germany, just one example:

https://www.motorradmeistermilz.de/Kette-Rollenkette-116-Glieder-1/2-x-521-x-851

I hope i could help you

Regards
Ralf

13
British Bikes / Re: Searching front wheel and fork for lightweight motorcycle from 1920's
« on: November 13, 2020, 06:23:28 PM »
Good evening everyone!

Many many thanks for your answers! Thats a great forum!
The reason, why I am looking for a 40 spokes wheel is because the existing rear wheel also has 40 spokes.
But you are right, on the photo from my first post are only 36 spokes. Maybe my rear wheel is wrong or the DSH was produced in both variants.
And you are all absolutely right, better a front wheel wi´hich is not 100% correct, then no front wheel  ;D
Thank you for the hint with the hub manufacture, thats very useful!

Re the girder fork, I think you are right, maybe the frok was selfmade by DSH under licence from Druid.
Attached you can find a photo of such a DSH with the fork.

Many thanks to all!

Regards

Ralf

14
British Bikes / Searching front wheel and fork for lightweight motorcycle from 1920's
« on: November 11, 2020, 07:51:25 PM »
Hello,
I am looking for a front wheel and a girder fork for a lightweight motorcycle from 1925. It is an austrian motorcycle brand, but almost all parts are british.
The front wheel should fit for 26x2 beaded edge tyre (or maybe 26x2,25), so the circumference of the beaded edge rim should be aprox. 172 cm (inner section) and the inner width of the rim aprox 3,5cm. Furthermore the front wheel should have a drum brake and 40 spokes.
The girder fork which I am also looking for, is maybe a brampton fork, but I am not sure.
Please take a look on the photo, I think the experts here can identifier my wanted parts.
If anybody have such a front wheel or grider fork, or only parts of it and would sell it, would make make very happy.
Many thanks in advance
kind regards
Ralf (and sorry for my bad english)

15
British Bikes / Re: Villiers 172cc sport
« on: December 17, 2019, 06:41:21 AM »
Is it true that all 172cc sports engines had steel pistons?
Because my engine has an aluminium piston. Furthermore both of my engines has conrods which are marked with "VIII C"
Is this ok, or a part mix?
Thank's
Ralf

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