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D14 off road air filter.
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Roland Malcolm
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January 14, 2021 - 9:57 pm
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Hello, I am looking for an air filter for a D14 engine fitted with an amal 626 Mk 1 concentric. I do not want to use the standard one as I intend to have no tool boxes, battery carrier etc. This is a trail type build with electronic direct ignition. All the pancake filters available are too thick for the limited space between the carb and the frame rear down tube. Any ideas welcome. Thanks, Roland.

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Sponge
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January 15, 2021 - 9:13 am
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Roland Malcolm said
Hello, I am looking for an air filter for a D14 engine fitted with an amal 626 Mk 1 concentric. I do not want to use the standard one as I intend to have no tool boxes, battery carrier etc. This is a trail type build with electronic direct ignition. All the pancake filters available are too thick for the limited space between the carb and the frame rear down tube. Any ideas welcome. Thanks, Roland.  

Hi Roland, unless you have done something different mounting your carb there should be ample room for a pancacke filter in there.

 You could consider leading a length of flexible rubber hose off the carb inlet and up to a Vokes type air filter element under the seat pan.  This would work well  and its all readilly available. I think its a case of finding an air filter that you like and working out how to mount it on the bike. All you need then is some rubber hose. If clearance is tight then use the Std D14  rubber air pipe to dodge the frame downtube and graft an extension onto it.

If you dont like the Vokes filter then a Std Amal or spec K&N would also be suitable. 

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cocorico
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January 15, 2021 - 11:47 am
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I fitted one like this to a D3 at one time. Just fitted between the carb and down tube. They are available in various throat diameters and with angled connections if required. Could also be used with a flexible extension to take it up under the seat, as suggested by Sponge. They are also dead cheap!

Filter.jpeg

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mcafee
Malton North Yorkshire
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January 15, 2021 - 12:00 pm
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AE61ED92-F018-4250-A51C-009E72D024C8.jpegHi,here is my solution to adding an air filter to cope with deep puddles.I know it is a Mikuni carb but with the right adaptor it should work for an Amal.  David

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cocorico
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January 15, 2021 - 4:12 pm
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That's just what I was thinking!

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Alan.Moore
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January 15, 2021 - 4:38 pm
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Roland

As Les says a pancake filter should fit OK on a D14 (and B175) ...I had one on my B175, Spacedmarine has/had one fitted to his and there appears to be loads of room. Maybe some are deeper than others?

Cheers

Alan

1939 Ariel VH, 1942 Ariel WNG, 1951 Triumph 6T Thunderbird, 1970 BSA Bantam B175, 1980 Honda CB250N, 1986 Yamaha SRX600

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Roland Malcolm
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January 15, 2021 - 4:41 pm
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Thanks for all the input. Having put the engine back in the frame today I can get a pancake filter in by using bolts instead of studs to attach the carb. I was looking at my D7 for reference and had not realised that the monobloc was actually a bit shorter, front to back, than the concentric carb. All sorted now. Thanks again, Roland.

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