stompy
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« on: 14.05. 2011 12:11 » |
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As my new (to me that is) 1949 Star twin runs no filters on its carbs,I worry about what it is ingesting. Does anyone have any ideas about filters for these? There is very little room behind the stacks,so they would have to be very compact! Any advice most welcome.
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bsa- bill
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« Reply #1 on: 14.05. 2011 21:21 » |
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depends where in the world you live Stompy
In the UK we use damp air filters (rain) seems to work seeing as some A's are still running on original bores
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All the best - Bill  |
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stompy
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« Reply #2 on: 15.05. 2011 01:57 » |
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Thanks Bill, Im in Melbourne, Australia. Whats the story with the filters you mention?
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bsa- bill
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« Reply #3 on: 15.05. 2011 10:35 » |
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Ah sorry Stompy - I love Aussie humour but obviously my brand of funny passed you by
I was relating to the fact lots of our bikes have no filter (or BSA one which also counts as none) and it rains a lot so we don't get the dust issues you guys have to endure
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All the best - Bill |
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stompy
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« Reply #4 on: 15.05. 2011 12:22 » |
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You may picture me punching up crocodiles and tying them to the back of the bike,dragging them back to my hut and making saddlebags with their hide, but I live in a big city and pollution is more of a concern than dust. Maybe tire and brake dust!
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BSA_54A10
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« Reply #5 on: 15.05. 2011 14:20 » |
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Me thinkeths that K&N's will fit.
They will look a bit out of place but most intelligent people can deal with that.
Foam filters that are cut at a slant ( like Ducatti's ) will also work if you can find some in the right size ( Morrini 350 ? )
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Bike Beesa Trevor  |
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muskrat
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Lake Conjola NSW Oz
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« Reply #6 on: 15.05. 2011 21:55 » |
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G'day Stompy,
I have seen stumpy filters used on minimotos. I have a mate up here that has one on his Matchy, I'll investigate.
Cheers
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Only young once, immature forever. Now how can I make this go faster. '51 A7 plunger, '57 A7SS now A10, '71 A65 Lightning (gone to god) '76 XT500, '83 CB1100F, next project a '64 A65. |
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Brian
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Mt Gambier, South Australia.
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« Reply #7 on: 16.05. 2011 00:24 » |
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Dont want to seem negative but I really do think you will struggle to find anything to fit a Star Twin.
For the benefit of others I've added a pic of the right side, the left is not much better. You can see there is only about a inch between the oil tank and carby.
Good luck.
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stompy
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« Reply #8 on: 16.05. 2011 02:23 » |
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Stuff all room its true,the left appears even worse.
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trevinoz
Newcastle, N.S.W. Australia.
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« Reply #9 on: 16.05. 2011 22:44 » |
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My set of carbys only have bellmouths with gauze strainers fixed to them.
The gauze, as I see it, has two functions.
One, to prevent rocks entering the engine and two, to arrest flames on blow back which could save the bike from burning.
Trev.
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stompy
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« Reply #10 on: 17.05. 2011 07:52 » |
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I like the sound of the gauze strainers Trev,as my bike shows evidence of a fire at some stage before my ownership. The left bellmouth is very close to the battery too. The float gets stuck sometimes and fuel pours out the top. Its quite a fire hazard and Im trying to make it safer!
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muskrat
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Lake Conjola NSW Oz
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« Reply #11 on: 17.05. 2011 12:26 » |
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G'day Stompy,
the minimoto filter is about 1 3/4" long so may not fit. Trev's bellmouths with some light cotton fitted over might work.
been running the '51 for 25 years with no filter, only on 3rd set of rings.
Cheers
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Only young once, immature forever. Now how can I make this go faster. '51 A7 plunger, '57 A7SS now A10, '71 A65 Lightning (gone to god) '76 XT500, '83 CB1100F, next project a '64 A65. |
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stompy
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« Reply #12 on: 17.05. 2011 12:29 » |
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Trev,do you know a place that sells the bellmouths?
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trevinoz
Newcastle, N.S.W. Australia.
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« Reply #13 on: 17.05. 2011 23:56 » |
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Stompy,
You could try Amal for the bellmouths.
The gauze in mine is brass. The theory is that a flame will not pass through gauze which was demonstrated to me at school so many years ago.
This is put to practical use in miner's safety lamps.
Trev.
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*nick*
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« Reply #14 on: 29.07. 2011 00:08 » |
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Stompy, perhaps try investigating running a small foam air filter (dry type) from an Australian company called UniFilter, i've seen them on all manner of classic racing cars and bikes. |
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michaelcboyd
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« Reply #15 on: 01.01. 2012 16:41 » |
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My Star Twin is now fitted with a 276 carb as I had no luck with the twin carbs. However I did have a fire as the engine back-fired after I had flooded the carb to start .
Since then I have fitted a gauze from a tea strainer and secured around the carb mouth with a hose clip, not pretty but prevents a fire. At Kempton park in Dec a guy was selling gauze filters for a £1 each that could esily be modified.
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