Hi
I've just finished restoring a 1970 A65L. I put around 4 to 5 litres of petrol in the tank but when I tickled the carbs only the l/h one showed petrol. Looking in the tank it shows almost all the petrol is on the l/h side - less than an inch on the r/h side. My other BSA is an M20 which has a balance pipe to equalise fuel in the tank - how does the A65 do this?
Thanks
John
LH side is the sidestand side, thats why the fuel fills there first, if you had a twin outlet tank (2 taps) one side can act as a reserve.
we used to rock the bike from side to side to get the fuel from right side to left outlet when it started to run out on the left.
only way to sort is fill tank when bike is upright or point funnel or nozzle over to the right, when you park up on sidestand any over the hump will flow to the left
Hi John,
As Chaz said one side serves as a reserve. Have you got the pipe connecting the two carbs? If not you will have to run with both on and risk running dry.
Dave.
Thanks guys for the quick replies.
I do have a tube between the carbs so will check why the fuel doesnt seem to be going across.
muck in filters at the banjo connectors on the carbs? do you get anything tickling the carb?
any muck in the second carb float bowl? and the one I suffered from, the ethanol had melted the old fuel pipe and blocked it.
only other suggestion is pressure of fuel, is the 4 or 5 litres enough to push over.
Hi,
If the assembly was dry then it is possible that there is an air bubble so try both taps on and tickle both carbs. Once the engine fires all should be well. 4 or 5 litres should be plenty as one side of the tank can run pretty much dry before the other tap needs to be used.
Dave.
:) :) :) :)
I've followed this with interest because I'm about to fit a later tank to my 1964 A65.(Its a whim) Is it not possible to fit taps with a reserve setting. Thus ensuring a flow at least a little emergency fuel???
Mike 8) 8) 8)
Hi Mike,
You can fit a tap with a tube that restricts what can be used from that side but once it reaches the tube that fuel is then trapped on that side. The reserve fuel is in affect what is trapped on one side of the tunnel hence two taps the same.
I suppose there must be tap that has a reserve position built in to it. It would be like having two reserves but I know I would still run out occasionally. My failsafe is that my wife's bike has slightly bigger tank and is a bit more economical so it is a bit like having my own personal tanker. I always have bit of tube just in case some syphoning is needed.
Dave.
I went through my old fuel taps yesterday, noted one of the pull out plunger type that has two plungers, looking at the filter area there is a tube sticking up and a hole on the base, this gives a reserve .
if you dont mind non standard try
WW27729 its a replacement for Triumph T140 part 60-7267 1/4 in BSP in /1/4 BSP out similar to those fitted to JApanese bikes