Pancake or bellmouth?

[morris]

My plunger A7 has just been fitted with a new Amal Premier 600 series and space is tight between it and the down tube. A small bell-mouth would go in but is there an option for an after-market air filter?
{There is no trace of the original plunger air filter assembly}

On my Plunger that's got a 900 series concentric I managed to just wiggle in a short bellmouth like the one on the picture.
First tried a home made filter made from some air filter material I bought, but I couldn't make it big enough due to lack of room so ended up far too restrictive. Tried it anyway but it was like running with the choke permanently closed. Thinking about buying a sock filter to pull over the bellmouth but I'm afraid that'll end up the same way

[Triton Thrasher]

 I managed to just wiggle in a short bellmouth like the one on the picture.

That little gauze must be restrictive at full throttle.

[morris]

 I managed to just wiggle in a short bellmouth like the one on the picture.

That little gauze must be restrictive at full throttle.

That’s why I mounted a little fan behind it that kicks in at about 5000 revs... should see me going then 
If not, it’ll keep the flames in when it backfires.

[duTch]

 I've never been a fan of the OCD rivet counter side of me,  so am quite comfortable (with) my ally head on Plunger effort...

[BSA_54A10]

BSA Firebirds & Spitfires used a pill box air filter  that has an inset where it mounts on the carb so it goes forward to cover the carb mouth as well as back.
Thus you only need 1.5" to fit it.
The trick is to glue the front plate to the carb mouth then assemble the air filter to the carb rather than trying to screw the air filter on as a single lump which needs 3.5"

[muskrat]

I've never been a fan of the OCD rivet counter side of me,  so am quite comfortable my ally head on Plunger effort...

No rivets there hay duTch Where's the battery live?
Cheers

[Triton Thrasher]

Where's the battery live?

Other end from battery earth.

[RichardL]

I've never been a fan of the OCD rivet counter side of me,  so am quite comfortable my ally head on Plunger effort...

No rivets there hay duTch Where's the battery live?
Cheers

It looks to me like Dutch has grafted a piece of another mudguard on top of his blue rear mudguard to hide the battery

Richard L.

[BSA Biker]

In the UK I never fitted a air filter of any type, only A7SS, just a long bellmouth bought back in 1967, looked the business. But now living in Spain the dust is always about and the new 376 monobloc made by Burlen has already got wear marks on the slide. So the other day I bought and fitted the wire cone filter from Burlen, only just fits in the space between the battery carrier and the carb. Not sure if it will help keep the dust out but it looks okay.

[duTch]

 

..No rivets there hay duTch Where's the battery live?...

 Yep- what TT said...and hay was a bit too chaffy for seat padding...

 

..It looks to me like Dutch has grafted a piece of another mudguard on top of his blue rear mudguard to hide the battery .

 ....technically half-correct; I had a fold-up rear piece that I grafted onto a corrupted main guard that had been vertically chopped behind the main strut, and both batt.-earth and buddy batt.live live on the battery behind on the far side in the toolbox space .....