Email bikemaster with your ideas comments and materials. © 2010 Phil Hindle
Jonny Bealby decided to travel round Africa, down the west and back up the East coasts, but starting bizarrely in Tunisia! Adventure inevitably followed him, as did romance, men with guns and bad biking days. (do not know about his hair!).
His book, Running with the Moon paints a graphic picture of life on the road, and does not include the support teams that so many modern travellers take with them.
I am sure Barry Morse would be delighted to spend time discussing the deeper workings of Amal products with anyone keen enough to ask. Look out for him at club and wrinklies meetings meetings.
By Barry Morse.
I am now looking for ideas and material to feature in this section. If you have a technical thought you would like to share, a picture diary of your latest rebuild, a brilliant bike you want us to see, or any other interesting stuff, please get in touch and I will make sure it gets used.
Email bikemaster with your ideas and materials.
The pilot jet in the concentric carb is prone to getting blocked, particularly if left for a long time with petrol or 2stroke still in it. It is only possible to gain access to the pilot jet after removal of the pilot adjusting screw. Blowing air in here seldom clears the blockage.
Above is the offside of the carb showing the pilot screw (arrow pointing) and throttle stop screw.
Above picture: The blank side of the pilot after drilling and tapping.
Concentrics are built with each side a mirror image of the other. On the opposite side to the pilot screw is an identical but blanked off section. If this is opened up and a modified pilot screw and o ring inserted, when both screws are removed the blockage can be blown through and daylight will be seen through the pilot orifice.
The dummy pilot screw is made by cutting the taper section from a spare pilot. See picture, below.
The blanked section is then carefully drilled and tapped. Be careful not to let the drill go in too far, risking damage to the brass pilot jet. Use a 5/32 (3.9 – 4mm) drill and a 3/16 x 32 t.p.i. tap. Rinse and blow out the swarf . Add an o ring to the dummy pilot screw and reassemble.