When I opened my carb the clip was in the second grove from the bottom. On an Amal Concentric carburetor, if the float level is too high it will cause the float to interfere with the bottom of the carburetor and surprise you with a leaky carb. Needle jet 106; Needle position 1 or 3 ... Bear in mind that these are always starting positions, and the carb may need individual tuning. The problem I (still) have is the carburettor setting. Before you panic you need to know and understand a few things before you throw in the towel.. Remove cable by depressing spring and carefully lift out needle. With the throttle slide in this position, the engine is idling, the needle valve is shut and the pilot jet … Thus with the VM the needle is in play through wide open throttle. (To access slide needle, unscrew top cap of carburettor and withdraw entire slide needle assembly. Registered Office: Burlen Ltd, Spitfire House, Castle Road, Salisbury, Wiltshire, SP1 3SB Registered in England and Wales Registration Number: 2005550 VAT Number: GB 423 5232 84 1. So you purchased a new Amal Premier carburetor and noticed that your classic motorcycle is running too rich or too lean on the pilot circuit. Stock T140 Triumph: 930 Concentric 190 main 106 needle #3 slide "STD" needle in the second position I already replaced the jets and the needle and the throttle slides and everything is according the manual now: main jet: 190 needle jet: .106 position: 1 (lowest) cutaway: 3 There are two problems: The first is that there is a "gap" between idling and little throttle opening. My question is this, is the top groove in the needle number 1 (leanest) or is the lowest groove number 1 (richest)? How The Carburetor Works: Throttle Setting, Full Closed: The carburetor proportions and atomizes the correct amount of petrol with the air that is drawn in by the engine. • With the Amal, depending upon which groove the needle clip is in, the needle leaves the needle jet at approx. Hi Guys, my manual for my T140V says the Amal Mk1 carb needle clip position is number 1. What does raising or lowering the needle mean? Post by mathologie » Thu Jun 05, 2008 10:10 pm. Thanks. I read that the correct position for the needle clip is 1 But one from the top or from the bottom. 8. Amal concentric needle clip position and stalling. 3/4 throttle. Raising the needle richens the mixture and lowering it … It is no in play when tuning the main jet. The needle jets look similiar, but are not the same. Remove slack from the carb … The taper needle position in relation to the throttle valve can be set according to the mixture required by repositioning the jet needle clip in any of three positions thus raising or lowering it. AMAL Main and pilot jets are interchangable between Amal MK1 and MK2s. Example: – 6 5 Grooves 3 3/16” where 6 is the marking on needle, 5 Grooves is the number of grooves in the needle & 3 3/16” is the overall length of needle. Do you know what part in your carburetor controls the majority of the fueling? When this happens, the float will no longer be able to close the needle in the seat orifice to prevent fuel from entering the carburetor. Amal concentric carburettors don't have an idle jet, well not one you can tune as such, and the needle has no effect on idling whatsoever. • With Mikuni the tip of the needle never leaves the main jet orifice all the way through wide open throttle. Move circlip nearer to middle of needle for (a) and nearer to end for (b). The information for each needle type is laid out as follows – (a) marking on needle (if any), (b) number of grooves in needle, (c) overall length of needle.
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