Battery & voltage regulator update

[Segmant]

Hi

I have a Honda CB250N 1979 that im currently turning into a Cafe Racer.

As i have very little space i'm looking at getting an Antigravity 4 Cell Lithium Battery https://www.antigravitybatteries-uk.co.uk/small-case-type-batteries/antigravity-battery-ag401.html though expensive it'll solve my space problem, the problem i have is that electrics baffle me!!

I have to update my Voltage Regulator, what am I looking at re aftermarket parts? I know what i need to swap but i don't know what with.

Cheers

https://cdn.bikechatforums.com/files/cb250__uk_.jpg

[stinkwheel]

It'll run like an utter bagowank if you remove the airbox. Superdreams have fussy diaphragm-free CV carbs and really like a predictable pressure differential between atmosphere and the venturi chamber. Just so you know.

I'm pretty confident that the wiring diagram you have posted there is NOT for a CB250N. It's almost certainly for a much earlier K-series CB250.

The CB250N has a proper, 3-phase reg/rec unit which was and still is well regarded as being an effective and reliable reg/rec. Until the advent of mosfet voltage regulators, a superdream reg/rec was THE choice to replace a dodgy one.

So go find your reg/rec. I suspect you'll find a roughly 6"x6" black metal box with cooling vanes on it. It has three yellow wires, a green, a red and a black/white.

If it looks like this, keep it. It's a good-un.
https://tws.dk-server.co.uk/item78948-5b.jpg

Your wiring should be more like this:
https://i1091.photobucket.com/albums/i398/stripey955i/Motorbikes/CB250%20Restoration/Wiring_Diagram_CB250N__CB400N_all_models.jpg

Also on a more personal note. A 250N superdream as a cafe racer? You're having a laugh right? It'd be the all day challenge breakfast greasy-spoon Cafe racer. They weigh a ton and the frame has all the aesthetic merit of... well... a mass-produced 1970's pressed steel commuter bike.
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[Rogerborg]

https://i.imgur.com/m1P2XL1.jpg?1

Think how much more it'll be worth when it's sold on as "90% complete café conversion, was running great before it wasn't".

Eh, kickstart, so why not go the whole hipster and replace the battery with a big blob of capacitance?
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[chris-red]

That battery seem insanely priced.

I recently purchased one of these...

https://www.amazon.co.uk/Compact-Portable-Advanced-Protection-Flashlight/dp/B011U6Q0K6/ref=sr_1_29?ie=UTF8&qid=1449837515&sr=8-29&keywords=anker

It was £40 in the black friday sales. I don't know for certain but I imagine you could adapt it to use in a bike.

A quick comparison

£120 tart battery
120 CCA
6AH

£60 (or less if you shop around as I said I got it for £40)
400CCA
10AH

I'm sure there will be other cheaper options.
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[Robby]

Hmm. That battery is worth as much as a superdream.

Have a look at one of the little 4 or 5 amp scooter batteries if you're tight on space.

[stinkwheel]

[Ariel Badger]

I want an anti-gravity battery if it does what it says on the tin and for that price it should!
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