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Post by 1951superlux on Jan 7, 2024 14:18:37 GMT
...you wait ages for an Ambassador, then two come along at once: (At today's EACC Mince Pie Run)
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Post by buttybach1932 on Jan 8, 2024 10:31:01 GMT
Hi 1951superlux One of our Northampton Section members has a later Ambassador, but the models that I have never seen in the flesh and would like to have a good look are the Series 1 and Series 2 fitted with the Villiers 5E engine. This engine is the big brother of the JDL with twin side mounted exhausts and four transfer ports. As far as I am aware Ambassador was the only British manufacturer to fit this engin e. Attached below are a couple of pictures of a partly restored ? Series 2 with welded tubular frame that I found online. Regards Butty Bach   |
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Post by 1951superlux on Jan 8, 2024 15:19:56 GMT
Here's a somewhat different Ambassador ... again, not turning up singly This was an the Banbury Run in 2002.
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Post by buttybach1932 on Jan 30, 2024 10:55:55 GMT
Hi 1951 Superlux The pictures from the EACC Mince Pie Run that interested me were of the Mandille et Roux. It's a make that I had not come across before. The Sachs engine is an interesting little unit but the carburettor induction pipe is just weird. Is it because the engine has been fitted with a different carburettor ? This week I am hoping that we can get my mates Honda P50 running. It's been in storage for several years because it did not have a silencer. Last week he managed to buy a replica stainless exhaust and silencer through an advert in Iceni CAM Magazine. The replica silencer looks OK but it weighs a ton. Lets hope there are no major problems with the engine because he has never had it running. Regards Butty Bach  |
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Post by 1951superlux on Jan 31, 2024 9:45:54 GMT
The Sachs engine is an interesting little unit but the carburettor induction pipe is just weird. Is it because the engine has been fitted with a different carburettor ? I don't know about the carb, but I don't think it's the original induction pipe. |
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Post by buttybach1932 on Feb 1, 2024 13:22:08 GMT
Hi 1951superlux
I have had a more careful look at the photographs of the Mandille et Roux and I think the carburettor is a Amal 361 as fitted on D1 BSA Bantams. The induction pipe is probably that length because they could not bend the induction tube to a tighter radius. I am surprised that the carburettor does not vibrate and suffer from fuel frothing problems. The original carburettor would have been a Fichtel & Sachs carb.
Thanks for the original photographs, they clear another mystery because the bike appears to be designed so that it can be pedalled. The chain goes round a sprocket on the pedal crank and the gearbox final drive sprocket. On the bike at the Mince Pie run the chain only goes around the final drive sprocket so the pedals cannot be used to power the bike or assist the engine.
There is a video on You Tube showing a similar Sachs engine being stripped and rebuilt and its really nicely made inside.
Regards
Butty Bach
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Post by 1951superlux on Feb 1, 2024 20:11:47 GMT
The Sachs 98cc engine was used in dozens of German makes of kleinkrafträder during the 1930s but, as far as I can see, none of those used the same arrangement: they all had a conventional pedalling chain.
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Post by buttybach1932 on Feb 2, 2024 18:58:59 GMT
Hi 1951superlux I have noted that there appears to be two versions of the 98cc Sachs M32 ? engine. One with and one without a kickstart. On the version without the kickstart the pedals are needed to start the engine. Which begs the question why did Mandille et Roux fit pedals and a kickstart. Was it to comply with French Law for this type of vehicle. Like the UK's old moped laws. I also note that Sachs appear to have manufactured an updated version of the engine with a flat topped piston. But like the Royal Enfield Flying Flea it has two transfer troughs in the piston top. This was possibly done to get around the 'Schnurle Loop Scavenging' patents that were held by DKW. Regards Butty Bach   |
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Post by 1951superlux on Feb 3, 2024 9:31:31 GMT
I have noted that there appears to be two versions of the 98cc Sachs M32 ? engine. One with and one without a kickstart. On the version without the kickstart the pedals are needed to start the engine. Which begs the question why did Mandille et Roux fit pedals and a kickstart. Was it to comply with French Law for this type of vehicle. Like the UK's old moped laws. To qualify as a bicyclette à moteur auxilaire in France a bike had have pedals and to be under 100cc, under 30kg, & under 30km/h. This lasted to 1939 when the weight limit went up to 35kg. Then all the categories were reshuffled during and after WW2. However, a lot of cheating must have gone on as all the BMAs I've see would have broken both the weight and speed limits. The models submitted to the service des mines must have been a bit different from the production versions. |
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Post by buttybach1932 on Feb 3, 2024 16:43:18 GMT
Hi 1951superlux
Thanks for that information I presumed that it must have been to comply with the vehicle regulations. The odd design would allow the vehicle owner to easily disconnect the pedal drive which would actually be an improvement because the drive chain would be properly wrapped around the gearbox sprocket.
Regards
Butty Bach
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d7er
New Member
I'm not that new, I re-joined four years ago. I volunteered for the south Northamptonshire area rep'
Posts: 46
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Post by d7er on Feb 19, 2024 19:37:53 GMT
I've lived in south Northants all my life and have tried for the last 15 years to find any similar souls who'd like to do some two stroke local mileage, but generally if not always now ride on my own, the Cock Inn at Roade used to be a venue a few years back, but due to the early demise of fellow running it, it seems to have finished?
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Post by buttybach1932 on Feb 21, 2024 12:20:08 GMT
Hi d7er
Glad to see you back. I wondered what had happened to you, as you posted the AMC 150 enquiry and then did not log in for several months.
The BTSC Northampton Section still meet on the 2nd Wednesday of the month at 7.30 pm at the Cock Inn at Roade. As there are only 3 or 4 of us that meet up we usually ring around on the morning of the meet to see if we can make it. I am not sure if there was a meeting this month ( February ) because I was ill.
If you send me your phone number or 'e' mail address via a 'Private Message' I will confirm that the next meeting scheduled for Wednesday 13th March is on.
Regards
Butty Bach
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