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Upgrading the D1 engine
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dreverl
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January 6, 2019
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January 6, 2019 - 9:54 pm
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Hello All,

 

Ive been asked to help my Uncle restore his 1955 Bantam so I thought Id start by asking a general question here.

 

Im sure this is covered somewhere so maybe a heads up of where to look might be all thats required.

 

What upgrade options have we got for the either the D1 engine, or swaping out for a D14/B175 engine/gearbox package? Do these bigger engines fit directly in? If they do, that seems the easiest way doesnt it? If not, what can I do to get more out of teh D1 engine.

 

I dont want to finish the resto and think back 'I shouldve done that if Id known'...

 

Thanks for your help

Andrew

 

NB: I just checked and the engine number is actually DD so it's not a D3 but a D1 I think.

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cocorico
Central France
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January 7, 2019 - 9:35 am
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Hello Andrew. If you look in FAQs (2nd topic down under 'New Users) you will find a topic titled 'How to make your D1 go as it should', it applies to all Bantam engines also, which may be useful as all model engines fit straight into all model frames.

All the info you need will most likely be somewhere in the forum, just learn to use the search facility or type your search site:bsabantamclub.com/forum into your browser, where your search is a keyword or two.

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GlenAnderson
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January 7, 2019 - 6:38 pm
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If your engine is the bike’s original one, then you should be able to fit a 150cc head and barrel, which would be the best starting point if you want to keep your modifications invisible. 

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