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rossclark wrote:you need to do a leak down test, basically find a means to pressurise the cylinder and crankcase and see how long it holds pressure for.
A simple way to do it is with the piston at BDC place a section of bicycle inner tube with one end over your carb manifold and the other over the end of your exhaust U bend. Pump it up to about 5 psi and see if it holds - if not start spraying soapy water round the various joints - inlet manifold, cylinder head, base gasket, round the mag housing etc.
MickYork wrote:The choke adds more fuel, altering the ratio of fuel to air.......so you have either either too much air (air leak) or too little fuel (bigger pilot jet).
With the over rev' you mentioned previously this would point to an air leak.
An air leak can cause serious problems, with the potential of holing your piston.
LammySX wrote:MickYork wrote:The choke adds more fuel, altering the ratio of fuel to air.......so you have either either too much air (air leak) or too little fuel (bigger pilot jet).
With the over rev' you mentioned previously this would point to an air leak.
An air leak can cause serious problems, with the potential of holing your piston.
Over revs was a one-off, hasn't happened since last week, I'll assume it was a sticky cable
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