A Practical Mechanic’s Guide to TKM Karting If the the Pop-Off pressure is more than a few pounds out or when set correctly the stabilised pressure is not correct then something is wrong! •
Ensure that the four screws holding the diaphragm cover are correctly tightened.
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Ensure that the Diaphragm and Diaphragm Gasket are in good order and correctly assembled.
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Ensure that the Metering Valve and its seat are clean and undamaged.
7.8 Re-fitting the Carburettor Ensure that the 3 gaskets are in place and in good condition [Figure 7.4.2-1]. The two carburettor securing screws should be tightened to the correct torque [14.3]. Note that these need to be rechecked frequently as the engine vibration and the length of the screws may cause them to slacken. Fit the Air filter and tighten the jubilee clip to the absolute minimum required to keep it in place. If you over-tighten it the rubber will stretch and it will become harder to fit. When fitting the Air Intake Box, ensure that it, and the jubilee clip which holds it in place, are perfectly lined up. If it is miss-aligned then the black plastic housing will crack when you tighten the jubilee clip. The trumpet should be high enough to clear the side pod or, if it's raining, positioned in the side pod [7.11]. The Air Intake Box can be fixed to the Back-plate using self-taping screws. If you choose to do this then take care to not crack or split the Back-plate. Ensure that when the accelerator is pressed fully down the throttle is fully open, but that the throttle actuator arm is not under load against its stop. This needs careful adjusted because the carburettor will be damaged if it is over-stressed. Adjustment is usually provided on the front end of the cable outer and to the accelerator pedal stop.
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Chris Compton (compark) 2001