Hi, I have a Honda CD200 that has never started well, tried all sorts but now garage is saying I need a new carb as the needle sticks. Whats been happening, the bike while running starts revving higher and higher, so I have to kill the engine then she won't start - garage said she keeps burning plugs so tried hotter ones, still the same. Now they're saying new carb - do they really wear out that bad that a refurb wouldn't work? if so do any others fit or anyone know a supplier that sell NOS or pattern ones converted to electronic ignition, has 2 in 1 exhaust, new battery, other electrics seem fine - help