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SpacedMarine's D14
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SpacedMarine
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September 15, 2019 - 7:38 am
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swalsh58 said
Allen has articles in Classic Motorcycle Mechanics, and has been on tv quite a bit recently with Henry Cole. He is an amazing engineer and his creations are fantastic.   

So I'm guessing the answer to my question is not unless your Allen Millyard ??? wowscared9_gif

I could make a new shaft and I've got the hang of crank rebuilding now so if I can find something that'll fit without too much modification to the cases its possible.Just wondering if it would actually be any more powerful than a standard bantam alternator wired for 12 voltsScreenshot_20190909-144138_Gallery-2.jpg

Heres one I made earlier 🤣

What's 7/16 in mm again?

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SpacedMarine
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September 20, 2019 - 5:04 pm
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Well for anyone that's interested she's now running 12 volts.Was pretty easy once I got the two switches I pretty much made it up as I went along.Screenshot_20190920-165413_Gallery.jpg

Mounted the rectifier in the battery compartment.Wasnt sure the larger battery would fit but a bit of packing polystyrene underneath and 4 zip ties it's like it was made for it and its sealed aswell so that's nice.Have to do something about the switches though!could do with painting the sub frame aswell looking at the pictures and yes I put an inline fuse in once I'd finished.Got a 15 amp in at the moment but I think 10 will probably be enough as even with all the lights on cant see it drawing more than 120watts!Screenshot_20190920-165356_Gallery.jpg

So now it goes and hopefully will be reliable.Next job is get back on the forks.Someone mentioned that the new type fork bushings need punching onto the stanchions.I tried it on the spare set of old forks I had lying around as whoever's rebuilt those had just shoved them on and were loose.4 taps in the oil holes on the bushes and they were solid.Happy as I didn't want to try it on the new ones and deform the brass.

What's 7/16 in mm again?

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cocorico
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September 21, 2019 - 3:08 pm
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SpacedMarine said

I could make a new shaft and I've got the hang of crank rebuilding now so if I can find something that'll fit without too much modification to the cases its possible.Just wondering if it would actually be any more powerful than a standard bantam alternator wired for 12 volts

There are any number of complete cdi units, complete with multi-pole alternators available for peanuts on aliexpress. Usually free delivery too. Might be worth a look? EDIT - no, only a spare cdi coil. I may even have one spare (ordered one and 2 turned up for some reason) if you fancy.

1956 D3 running, lights to sort. 7 other bikes in the Barn, 6 runners (when I get time!) and a still in progress Morini 250

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SpacedMarine
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September 21, 2019 - 4:37 pm
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cocorico said

SpacedMarine said
I could make a new shaft and I've got the hang of crank rebuilding now so if I can find something that'll fit without too much modification to the cases its possible.Just wondering if it would actually be any more powerful than a standard bantam alternator wired for 12 volts

There are any number of complete cdi units, complete with multi-pole alternators available for peanuts on aliexpress. Usually free delivery too. Might be worth a look? I may even have one spare (ordered one and 2 turned up for some reason) if you fancy.  

If your not using it I'll have a go at it might be an over the winter job as I'm riding to work on it at the moment 😆 could go well with my brand new home brew crank if I ever get around to it!Screenshot_20190921-163906_Gallery-1.jpg

Guess I'm a little way off yet 🤣

What's 7/16 in mm again?

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cocorico
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September 21, 2019 - 6:18 pm
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Sorry - I checked but it was only a cdi coil that is duplicated. The whole lot is dead cheap though. Like this stator unit, cdi unit is no more. ** Please log in to view **

1956 D3 running, lights to sort. 7 other bikes in the Barn, 6 runners (when I get time!) and a still in progress Morini 250

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SpacedMarine
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September 21, 2019 - 7:23 pm
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Ta Coco no worries.Looking at that I'd still need some kind of flywheel.Worth thinking about.Im actually thinking about making some beefier fork bottoms to help stiffen the front up but I'm guessing most of the flex comes from the puny stanchions and badly fitting bushes 🤣

Was even thinking of making them out of thicker walled stainless like this ** Please log in to view **

But maybe too blingy  for a bantam !

What's 7/16 in mm again?

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mike p5xbx
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September 23, 2019 - 11:59 pm
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SpacedMarine said
Ta Coco no worries.Looking at that I'd still need some kind of flywheel.
 

you can get the complete thing from China if you fancy doing some machining adoption
** Please log in to view **

but like one of the popular CDI for bantams it has no electronic built in advance/retard

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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cocorico
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September 24, 2019 - 8:56 am
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mike p5xbx said ...you can get the complete thing from China if you fancy doing some machining adoption
** Please log in to view **
but like one of the popular CDI for bantams it has no electronic built in advance/retard  

Does that matter on a Bantam though? There again, although this sort of modification is interesting to read about, does it really change the nature of the beast? I think I prefer to keep mine pretty close to original and ride a 'newer' bike for more performance. Just my choice though. cheers

1956 D3 running, lights to sort. 7 other bikes in the Barn, 6 runners (when I get time!) and a still in progress Morini 250

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BonesCDI
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September 24, 2019 - 9:31 am
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mike p5xbx said

SpacedMarine said
Ta Coco no worries.Looking at that I'd still need some kind of flywheel.
 

you can get the complete thing from China if you fancy doing some machining adoption
** Please log in to view **

but like one of the popular CDI for bantams it has no electronic built in advance/retard  

Yes this unit does have built in advance...………..

Running and project bikes from 1912 -2005..........She hasn't said stop yet.........

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SpacedMarine
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September 24, 2019 - 9:36 am
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It's running perfectly as it is at the moment.If I went to the effort of making some kind of cdi system I would want the advance/retard function. Why?Why bother otherwise! Ok it may change the nature of it but as I say why bother otherwise.I had this conversation with my Dad over the 12 volt conversion.He said part of the charm was being old and unreliable.I said not when your broken down ten miles from home!🤣.He said push it I said just buy a decent pair of boots then😆.

I mean if your actually gonna do something like a restomod type thing why not go the whole hog and go fuel injection and adjustable suspension,mag wheels etc.

It's not something that I'm planning at the minute as like I say it's running perfectly for now.

How far could you actually go with frame modifications etc before you have to get single vehicle type approval and start paying road tax?

I mean if you wanted to go mental you could do this 🤣🤣

Anyway I'm off to the garage 😆

What's 7/16 in mm again?

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cocorico
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September 24, 2019 - 10:24 am
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As we always try to say - it's your bike to do with as you like. Just saying that the kit is available, both made to measure or requiring modifications, but for myself, as I have an old D3 in it's (mainly) original state, as well as several other bikes of various types, I can afford the luxury of a possibly unreliable 'classic' bike. I'll get me coat...get-me-coat

1956 D3 running, lights to sort. 7 other bikes in the Barn, 6 runners (when I get time!) and a still in progress Morini 250

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mike p5xbx
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September 24, 2019 - 5:31 pm
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cocorico said

Does that matter on a Bantam though? There again, although this sort of modification is interesting to read about, does it really change the nature of the beast? I think I prefer to keep mine pretty close to original   

No not in any great degree but we all like to fiddle about with different mods, be that condenser alternatives or voltage regulation or even LED lights
but all my bikes use contact breaker points ignition and I wouldn’t have it any other way
even if the points are from a Ford Escort smile

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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SpacedMarine
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September 24, 2019 - 6:43 pm
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mike p5xbx said

cocorico said

Does that matter on a Bantam though? There again, although this sort of modification is interesting to read about, does it really change the nature of the beast? I think I prefer to keep mine pretty close to original   

No not in any great degree but we all like to fiddle about with different mods, be that condenser alternatives or voltage regulation or even LED lights
but all my bikes use contact breaker points ignition and I wouldn’t have it any other way
even if the points are from a Ford Escort smile  

Yeah I'm of the mind if it improves the thing and its not ridiculously technical/expensive why not.I'm going to leave it on points for now as the hassle of making up the pickup,cdi or whatever isnt worth it.If I had a racer to play with maybe,or if something went seriously wrong and it had to come apart I may think about it.Small gradual improvements is the way to go I think unless you have more money than time or vice versa.Im happy with it the way it is at the moment although that may change 🙂

What's 7/16 in mm again?

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SpacedMarine
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September 25, 2019 - 6:23 pm
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BonesCDI said

Yes this unit does have built in advance...………..  

I'm assuming its wasted spark so itll be ok for a 2 stroke?Says it's for a 4 stroke is all.Im guessing theres a rev limiter on it too.Or are you referring to your name sake?How does the advance curve affect performance out of interest?Does it make it "perkier"

What's 7/16 in mm again?

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BonesCDI
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September 25, 2019 - 11:58 pm
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PM Sent.….

Running and project bikes from 1912 -2005..........She hasn't said stop yet.........

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mike p5xbx
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September 26, 2019 - 4:09 pm
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you can get the complete thing from China
** Please log in to view **.....1595183606
but it has no electronic built in advance/retard

BonesCDI said

Yes this unit does have built in advance...………..  

yes it has advance
but not any Retard
ignition curves for the PVL and elecworld
you dont seem to publish yours

bantam-time-corv.jpg

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D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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BonesCDI
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September 27, 2019 - 8:51 am
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No Mike...…...But if people want to ask me questions they're more than welcome to PM me.....I don't have anything to hide.

The forum has rules in relation to retailers which I have no intention of breaching......

Running and project bikes from 1912 -2005..........She hasn't said stop yet.........

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SpacedMarine
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September 27, 2019 - 9:58 am
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mike p5xbx said

you can get the complete thing from China
** Please log in to view **.....1595183606
but it has no electronic built in advance/retard

yes it has advance
but not any Retard
ignition curves for the PVL and elecworld
you dont seem to publish yours

bantam-time-corv.jpg  

I'm assuming the electrex graph is for a d14?25 degrees on that d7 😀

What's 7/16 in mm again?

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mike p5xbx
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September 27, 2019 - 4:18 pm
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The static timing on a 2stroke is a compromise between not breaking your foot with kickback starting it, reasonable mid range performance and not melting the piston trying to do 70+mph downhill
but you can run a lot more advance midrange if you can alter the timing curve electronically
the Chinese cdi I linked to is for a 4stroke and would guess its timing curve would be a more or less typical straightish line 4T as in the pic below
more reading if you are interested
** Please log in to view **

Tune-11A.jpg

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D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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