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D3 and/or D10, time will tell.
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BikeLugger
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August 14, 2016 - 11:46 pm
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Hi,

As I've mentioned ** Please log in to view ** in my introduction, I'm in the process of taking a couple of Bantams into my possession. I'm totally new restoring old things so I feel free to speak slowly and avoid using too many multisyllabic words. Also don't be afraid to point out what you consider to be something obvious, it could save me embarrassment.

So far I have both engines and a few odds and sods. The remaining cycle parts are still tucked away in a mates garage in the same condition he got them in and I've only been able to peak at them by torch light. They look dusty....

The BD3B looks like someone pulled the engine apart, then left a dry cylinder to corrode it's self into the barrel. Thanks. Oh, and the bottom end is also stuck. Thanks again. doh

Currently the stuck bits are sitting under my workbench with a nice bath of gunk hopefully soaking it's way down. You'll notice the broken cooling vane, nothing to do with me! 

Thinking positively I gave a selection of rusty looking parts a bath and good scrub down today. All being well they might come in useful.

Not bad considering the time they've spent exposed to the elements.

I'm not convinced on the condition of the clutch plates, lots of pitting. The friction plates are totally shot unsurprisingly.

 

The D10 engine looks a lot better, just missing a couple of covers, chewed up splines on the kickstart and few other bits missing. I've already spotted the missing covers on ebay so those are on order. I've also got a clutch compressor and sprocket holder thingy on the way so I can pull things apart on the D10 and curse my curiosity when things don't go back together again. 

So, thats where I'm at currently. I'll keep you posted as I go.

 

Cheers,

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Anderzander
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August 15, 2016 - 8:07 am
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Hi Matt

Hours of fun ahead of you!  

Forest of Bowland is a lovely spot - I'm between Preston and Blackpool and often take a ride over, I've been meaning to take the Bantam over to Dunsop Bridge for a while in fact.

Stephen

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August 18, 2016 - 10:25 am
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Yeh, it's a lovely part of the world. Great little lanes to ride around providing you don't mind dodging some muck and gravel! 

 

I've been working away from home these past few days, but I've returned to see all the bits I'd ordered have arrived. In the deliveries were a clutch compressor and a sprocket holder.  This gave me chance to pull the clutch on the D10 last night. As you can see from the bend in the sprocket holder, it was a little tight! I did't realise it had distorted until I had loosened the nut.

Everything looks in reasonable nick.

 

No initial sign of the wire circlip to hold the starter ratchet spring thingy in place. (not sure of the correct term...)

 

Only for it to be spotted hiding under the washer.

 

This doesn't look too promising. Seems to be a run of once molten aluminium with a black waxy build up next to it. Will have to see what that's all about once I split the case.

 

I've not done much with the D3 engine, just a bit more cleaning of the case internals, frequent spraying of the stuck piston and I've left the carb to soak in petrol. 

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Bournemouth Bantams
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August 19, 2016 - 10:18 pm
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I would not worry to much about the pinion retaining circlip popping off, the retaining cup wares due to the rotation of the shaft meaning the hole is then larger than the outer dia of the circlip. New retaining cups and larger dia circlips are a stock item.

Before you split the cases remove the two hollow engine dowels in the upper front and back engine mounting holes. If you don't remove them they hold the two halves and make splitting the cases difficult. the two halves are a metal to metal finish, no gasket so be careful you don't damage the faces. the clutch assembly may look the same between the two engines but there are differences so make sure you keep them separate.

Howard    

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BikeLugger
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August 19, 2016 - 11:41 pm
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Cheers for the tips, though I'd already split the case yesterday. I'll no doubt be putting in an order for a few parts soon!

The head came off with a slight struggle.

Then I managed to get the two halves to split with surprising ease. I was certainly expecting a struggle, but a few gentle taps from a soft face hammer saw it split with ease. As soon as it opened pieces of gears fell out...

Well, that's not good.

When I asked about the circumstances behind my friend getting the bikes he initially said he thought the D10 had sugar poured in the tank by someone who took a dislike to the previous owner. Judging by some singed rubber on the forks we then thought it may have seen some fire instead/as well. 

By the looks of it someone removed the dipstick and poured molten solder into the gearbox. If it didn't strip the gears when he kicked it over I bet it made some meaty clunks as soon as he let out the clutch and tried to pull away.

Ouch.

A good collection of parts laid to waste. The case still looks undamaged thankfully.

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cocorico
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August 20, 2016 - 8:25 am
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I've heard of wives shredding their husband's trousers and sugar in petrol tanks - but molten lead in the gearbox???

PO must have REALLY upset someone...

Hope you get it sorted OK.

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine being rebuilt (slowly).

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BikeLugger
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August 20, 2016 - 10:46 am
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Yup, whoever poured it was not someone you'd want to upset, that takes a bit of planning!

 

The primary drive sprocket took a bit of persuading with the puller and some gentle heat before it finally gave way with a bang.

A little bit of cleaning to be done here.

What do you think, new rings and this piston should be good to go?

 

I know this is turning into mostly stuff about the D10 engine, but until I get the cycle parts or extract the cylinder from the head of the BD3B I cant really do much with it other than clean components. 

After soaking the D3 carb I pulled it apart to check things out and see the build up of gunk. Managed to blast out all the bits of crud jamming up the jets using my airline. Even after a couple of days submerged in petrol the float was still floating so it bodes well for it not being ruptured. I'll probably hold it under petrol for a week or so on it's own before It sees active service. I've never done anything to carbs other than eaten them so most of my knowledge on how they work is guess work.

Looks the business at least.

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Bournemouth Bantams
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August 20, 2016 - 11:25 am
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That piston looks better than any I have taken out of a Bantam, have you cleaned It?

The rings look like they are the wider 1/8" rather than the usual 1/16" does it have a domed crown or a flat crown, from the pictures it looks like a domed.

I have a bag full of second hand cogs the same as the cog that is broken so don't worry about replacing that. if there are any other damaged cogs you need to ensure you match the pairs as there are various ratio alternatives and shaft configurations.

Howard

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August 20, 2016 - 11:36 am
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Bournemouth Bantams said
That piston looks better than any I have taken out of a Bantam, have you cleaned It?

The rings look like they are the wider 1/8" rather than the usual 1/16" does it have a domed crown or a flat crown, from the pictures it looks like a domed.

I have a bag full of second hand cogs the same as the cog that is broken so don't worry about replacing that. if there are any other damaged cogs you need to ensure you match the pairs as there are various ratio alternatives and shaft configurations.

Howard  

Yeah I gave it a clean, had some patches of carbon on the sides. Nothing that made it look like it had failed. Domed top is correct. 

There are two cogs and one shaft damaged. I'll get some better photos of them and post them up if you could let me know a price that would be great. thumbs-up

Cheers.

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Anderzander
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August 20, 2016 - 1:03 pm
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That carb cleaned up beautifully !

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BikeLugger
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August 20, 2016 - 1:48 pm
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Anderzander said
That carb cleaned up beautifully !  

Yeah, doesn't look too bad does it! I love the design of the inlet. 

 

These are the damaged components from the gearbox.

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Anderzander
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August 20, 2016 - 2:55 pm
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cocorico said
I've heard of wives shredding their husband's trousers and sugar in petrol tanks - but molten lead in the gearbox???

PO must have REALLY upset someone...

Hope you get it sorted OK.  

It seems bizarre to presumably get access to the bike with a blow lamp and length of plumbers solder ?

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BikeLugger
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August 20, 2016 - 10:23 pm
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Perhaps it was a plumber seeking retribution for unpaid bills?!

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Anderzander
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August 20, 2016 - 10:25 pm
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He'd have been better taking the bike ! 😀

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BikeLugger
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August 22, 2016 - 10:10 pm
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Did a little baking over the weekend. 

Made for very easy bearing removal before giving both halves a good clean

Not much I can get on with until a few parts arrive so turned my attention to what was a heavily corroded and damaged cover. Could probably do with a little more attention but I quite like the look.

In D3 news I've flipped the barrel to give the lower half a soaking and. This is the first time I've had a proper look at the damaged lower cooling fin. I didn't realise that so much of it was missing.

I wonder if that missing corner will create issues or if the collar will provide enough of a seal to prevent gas escaping.

Many thanks to Howard from Bournemouth Bantams for advise around the D10 and hooking me up with some replacement gearbox parts.

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cocorico
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August 23, 2016 - 8:06 am
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Might be worth looking out for a spare cylinder, or contact Dimitris - he's used some sort of epoxy on his exhaust stub, I think.

When your new bearings arrive, it might be worth measuring them against the originals as most modern ones are metric equivalents and may be a bit tight on the shaft. Also check for non-radiused edges where the casing is made for a radiused edge.

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine being rebuilt (slowly).

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GlenAnderson
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August 23, 2016 - 5:23 pm
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Personally, I'd replace that barrel rather than putting any time or effort into it. In a pinch you'd probably get away with using it again, but it's only something I'd consider if I were miles from home, massively skint or planning on selling the bike sharpish. 

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September 6, 2016 - 1:48 pm
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Well I had written a post but the forum seemed to swallow it when I tried posting. This will be an abridged version!

New Bearings in after another cook in the oven.

One of the bolts for the gear selector carrier had stripped some thread from the case. It did hold a bit, but I didn't fancy risking it even with thread lock so I tapped a larger thread size for a replacement bolt. 

Metric? who said anything about Metric...whistle

Pressed out the old little end bearing and squashed a new one back in again.

Time to put all the gubbins back inside and stick the two halves together!

Clutch, kickstart and primary sprocket came next.

Followed by the primary chain.

Ready for the piston.

So this is how it sits currently. Just need to fit the replacement bolts and then source a carb. I suspect the one for the D3 won't work, but I'd happily hear otherwise! Oh, then there is the small matter of ignition. I'm toying with the idea of a 12v electronic conversion...

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BikeLugger
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September 6, 2016 - 9:34 pm
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Ok, enough about engines for a little bit. Yesterday I managed to get some time and killed two birds with one trailer. I picked up the two Bantams and then dropped of the Chinese scooter with its owner.

First of all, we had to dig out the bikes. This involved moving a number of bikes before the Bantams were revealed in all their dusty glory.

Eventually they saw the light of day for the first time in decades.

It's clear to see that the D10 is missing a vast number of parts. Oh well, looks like I know which one I'll be playing with.

I tried my best to wheel this into the trailer, but he was having none of it. After he's finished work on his current project bike this will see his attention. I wonder if anyone here can correctly identify it.

After the 20min drive into the back of beyond the D3 had shed a little weight.

In with the old and out with the new. Bye bye scooter!

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cocorico
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September 15, 2016 - 10:19 am
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BikeLugger said
.... One of the bolts for the gear selector carrier had stripped some thread from the case. It did hold a bit, but I didn't fancy risking it even with thread lock so I tapped a larger thread size for a replacement bolt.

Metric? who said anything about Metric...whistle

Just make a note in the bike's log book for future reference. (You do have a log book don't you? - No, me neither! embarassed )

1956 D3 running, lights to sort. 7 other bikes in the Barn. 1950 D1 engine being rebuilt (slowly).

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