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Messages - DM

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2
Identify these bikes! / Re: Alcyon Autocycle
« on: January 30, 2020, 10:01:26 PM »
Banned after tomorrow.

That's a sad end for you.

3
European and Other Bikes / Re: 1952 Berini 32cc cyclemotor
« on: January 04, 2020, 01:33:54 PM »
The Grumph is nice to ride, realy light though so last time it was MOT'd I had to push down on the rear of the bike on the brake test.



Bit of luck today though as I got given another (1957) NSU Quickly.

5
European and Other Bikes / Re: 1952 Berini 32cc cyclemotor
« on: December 24, 2019, 10:34:27 AM »
Probably most towns and cities are much the same, but surely you want to ride a little further afield where the roads are clearer? :-\

Of course, that's why I have a variety of bikes. ::)
Going further afield I'll use the A.J.S or the Grumph, and with any luck I'll be able to get the New Imperial on the road next year

6
European and Other Bikes / Re: 1952 Peugeot BIMA re-build
« on: December 23, 2019, 10:05:37 PM »
Or get the mag tested on something like this Octopus.

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European and Other Bikes / Re: 1952 Berini 32cc cyclemotor
« on: December 23, 2019, 10:00:07 PM »
Bottom of the tank wants replacing completely, metal is a bit too thin to weld and seeing as it is a rare machine with only 4 known of this model I dont want to bodge it otherwise I'd have soldered patches over the holes.

28mph is plenty fast enough where I live in a small town by the sea, in summer traffic is heavy and you wont even get to 28mph.

8
European and Other Bikes / Re: 1952 Peugeot BIMA re-build
« on: December 22, 2019, 06:26:21 PM »
If you have wires to the coil wired backwards the spark polarity will be wrong but it should still run.

The Magneto Guys show you how to determine spark polarity with a  2 electrode spark gap and a pencil.

https://www.themagnetoguys.co.uk/spark-polarity

Years ago I made a mains powered test box to check flywheel magneto backplates off of the engine.( It will test bare armatures from normal magneto's too).
Basically I wire the ignition as per a car ignition circuit, supply DC power to the coil from the test box and use a NE555 timer pulsing a relay across the open magneto backplate points.
An adjustable spark gap on the test box makes sure I don't run the mag with too big a spark gap and damage anything.

You can get a rough measurement of the HT voltage from the size of the spark gap as it takes 3kV to jump a 1mm gap, again have to make sure the spark gap is not wide enough to cause damage to the coil.

Can leave it sparking on the bench for half an hour to see if the spark deteriorates when the mag coil heats up.

9
European and Other Bikes / Re: 1952 Peugeot BIMA re-build
« on: December 22, 2019, 04:15:48 PM »
Well you could read the instructions for checking the timing, which is set by altering the points gap.
It is done this way to ensure that the points open with the flywheel magnets in the correct position relative to the coil stator to get the best possible spark.

http://comet-restorations.uk/gallery/bima_instructions_1956.pdf

I  would have expected the engine to fire even if the timing is slightly out so would suspect you have no spark under compression.

I personaly would throw that can of easy start in the bin, before it damaged an engine.

10
European and Other Bikes / Re: 1952 Berini 32cc cyclemotor
« on: December 21, 2019, 10:43:00 AM »
I like all (old) bikes, still have another 2 Quickly's and 5 Cyclemotors hidden away.

The Quickly's I bought cheap with the intention of making a replica racer but are too good to chop about, but all of them got pushed to the back of the queue when I was lucky enough to get a New Imperial.

I reckon getting the New Imperial tank repaired is not going to be cheap.




11
European and Other Bikes / Re: 1952 Berini 32cc cyclemotor
« on: December 20, 2019, 10:03:35 PM »
Yes they can be great fun,

I was with my father when we found it, as he had one on a tandem that he and my mother used as back up transport before I was born he got it.

The NSU Quickly came from the same place the same year and I still have it on the road.


12
European and Other Bikes / 1952 Berini 32cc cyclemotor
« on: December 20, 2019, 08:54:35 PM »
We have had this since 1978 when the engine came out of the Northampton tip for 3, bike was a little more from the same tip.

Put together with mainly second hand bits, rims, spokes, frame, bars etc all came from different bicycles.

Engine has only had to come apart once since it was put back on the road.

Still in regular use.


13
European and Other Bikes / Re: 1952 Peugeot BIMA re-build
« on: December 20, 2019, 08:15:05 PM »
Why do you want to get the probes in through the slots ?

Measure continuity on the each wire to the mag backplate. one wire will go to the points and condenser so if the points are open there will be a high ohms reading on the meter (turning the mag over assuming the points are clean and making good contact should see the meter alternate from high to low ohms readings), the other wire will go to the generating coil and give a low ohms reading.

14
European and Other Bikes / Re: 1952 Peugeot BIMA re-build
« on: December 20, 2019, 06:44:31 PM »
Don't worry mini, we will aim for a new record just to wind you up  :)

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European and Other Bikes / Re: 1952 Peugeot BIMA re-build
« on: December 20, 2019, 05:11:08 PM »
It looks like there are only 2 wires coming out of the mag, you should be able to see which one is from the points through the apertures in the flywheel. Having worked on cars you should then know which coil terminal the points connect to.

If you can't see it use a meter to check which wire goes to the points (easy unless you have done something strange with the condenser ).


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