One question, what causes the clogged jets?
A number of things can occlude jets. One is deteriorating, aging fuel; especially now with the politically-motivated ethanol infusions we must suffer.
Then again, there are just plain ol' li'l bits of TRASH that now and then enter the sanctuary of our fuel supply system; could elude the petcock standpipe strainers, any aftermarket in-line filters, and wind up clogging one or more jets.
Even THIS has happened: The cork-like or rubber-like or whatever-like gaskets in the petcock assembly vicinity DETERIORATE, flake off, and merrily glide down the fuel line to the carburetor float bowl, where they raise their own demonic havoc.
Ain't exactly CLOGGED jets, but . . . fuel contamination through moisture can be a problem. The main jet is the lowest (in elevation) jet; water is heavier than gasoline; thus . . . a pilot or idle jet may suck up its sustenance and the engine idles fine, but . . . open the throttle, crack the butterfly valve, create manifold above the diaphragm raising the slide and the needle and . . . the main jet sucks up only incombustible WATER, resulting in a stall or flame-out.
From this rambling, purging your float bowl, to get rid of trash (if you're lucky) or contaminated fuel, and re-fill with the best gasoline you have on board (from your fuel tank) isn't a bad idea, when fuel contamination is suspected.