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Old 12-16-2012, 01:24 PM   #1
Worroll OP
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1957 BSA Bantom - just bought one!








Just picked this beauty up. 150cc, 50 mph max speed, 5 horsepower! It will be fun tracking down parts!
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Old 12-16-2012, 01:26 PM   #2
Pigford
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Part shouldn't be too elusive - those Villiers motors went in EVERYTHING back in the day - from water pumps to .. errr, bikes


Look up "Moto Giro" on the Googler
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Old 12-16-2012, 02:58 PM   #3
D.Bachtel
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Location: Nipomo ,,,, Where HWY 101 and HWY 166 collide!
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Pretty little bike. Not a Villiers but a Deek as in DKW.
War reparations and all that stuff.
German design, originally, but BSA produced and modified.

Could be wrong....

Don in Nipomo
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Old 12-16-2012, 05:12 PM   #4
Prmurat
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Bantam?
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Old 12-16-2012, 06:03 PM   #5
D.Bachtel
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Quote:
Originally Posted by Prmurat View Post
Bantam?
Correct.
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Old 12-16-2012, 10:39 PM   #6
motu
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That'd be a D3 Bantam Major - my fist bike. I think they do 51mph - details like that are important with a Bantam. My wife's first bike was a D7 Bantam Super - that's the 175.
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Old 12-17-2012, 05:30 AM   #7
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Correct, it's a D3 Major. I had to look up the engine number and the frame number to properly identify it. I'm going to restore it to original styling, probably not with original parts, but keep it looking era correct styling. I knew absolutely nothing about these bike until two days ago, so it'll be fun!

It is the DKW design, BSA tweaked and manufactured.

The biggest hurdle is it's missing the stator, ignition and that whole side cover for the engine.

I was curious with the top speed of 50mph, I'm assuming it just runs out of power at that speed, and the engine isn't screaming rpms? safe to run continuously at 45-50mph?
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Old 12-17-2012, 10:39 AM   #8
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That same DKW design was the basis of the Harley lightweights (AKA Hummer) from the late '40s to the early '60s. I have no idea whether any of the motor parts are interchangeable, but it might be worth checking into. There is an active Hummer community here in the states, so if anything like the side cover might work, they'd be a parts source to look into. They might even have a bit of knowledge on the Bantams too.

My first bike was an actual Hummer, which is one of a number of variants of the Harley lightweights and 125cc. My second bike was a Super 10, which was a 165cc version. They would run comfortably around 45mph. For a 14 year old in 1961, they were fabulous. Lots of new found freedom and I rarely saw a highway so the speed was just fine for surface streets.
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davevv screwed with this post 12-17-2012 at 10:47 AM
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Old 12-17-2012, 10:55 AM   #9
England-Kev
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In the 1950's, Bill Lomas and Dickie Dale -- Moto Guzzi works riders -- were invited to ride a Walsh-tuned Bantam and went through the 100mph mark on a number of times. The Walsh Bantam was thought to be the fastest 125cc powered bike in the world.

The Walsh Bantam...



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Old 12-17-2012, 11:45 AM   #10
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Just looked up the Harley Hummer, the engine looks near identical, except it's reversed. I do remember reading that BSA re-engineered the Germany engine reversed - gear shift on right side.
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Old 12-20-2012, 11:05 PM   #11
ricochetrider
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BritBike(dot)com

Hope by now you know of the website Britbike.com ...
Buncha great guys, real knowledgeable, and also a great source for parts, as most major Brit parts suppliers advertise or sponsor there.
Overall, probably THE best single resource for your resto/rebuild. NOT to discount the folks here, who are also quite knowledgeable, and helpful. I've met many of the BB.com folks, tho- and they are definitely really good people who will be as excited as you you are about your Bantam.
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Old 12-21-2012, 03:07 AM   #12
caponerd
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An interesting bit of DKW RT clone history is that Royal Enfield was making one in 1938. This bike was used against the Germans in WWII as "The Flying Flea" which was modified to be dropped from airplanes for use by airborne troops.

Quote:
After the German authorities stopped the Dutch franchisee of the DKW RT100 motorcycle from receiving any more supplies in 1938, preferring a non-Jewish company, Royal Enfield was contacted by the displaced importer about producing a similar motorcycle. Using a less sophisticated but increased capacity two-stroke engine in the same frame, a few of these RE motorcycles were made before the outbreak of the Second World War.
There's a rather sad story between the lines of that.
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Old 12-21-2012, 06:06 AM   #13
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I'll have to sign up at BritBike.

I never thought I'd be so excited about a motorcyle with less horsepower than my snow blower!
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Old 12-24-2012, 03:53 AM   #14
Brunow - 007
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I have the later D14 bike and it's perfect for cruising around town!
Parts won't be that mutch of a problem. Might even think about the electronic ignition!

Good luck with her!

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Old 12-24-2012, 06:45 PM   #15
vtwin
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Cool little bikes.

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