Did you ever fix this problem? I have a 98' model thats just done the same thing and don't want to start stripping it back for no reason.
Was running strong and starting well, stood for two weeks for remedial work pre-MOT and now will not fire.
Very good spark and chugs away on starter (not sprag clutch problem) - Seems to be fuelling but cannot imagine why?
Have you tried checking the fuel level & condition in the float bowl?
Had the entire fuel system to bits cleaned and checked - All perfect.
My gut suggests the old truth...
"98% of carburetter problems are electrical"
That said though I have found a huge hole in the bottom end gasket which leaks like a stab wound and am wondering if its losing all its pressure because of it, and simply not drawing fuel in...Don't forget it a big single and thats a lot of pressure.
Its the bottom end vertical gasket in the centre, and its leaking right under the starter motor - Upon turning over when filled with oil it squirts the black stuff straight up into the rear shock/undertray assembly at quite a rate.
Cagiva no longer make a replacement gasket - Hence me shelving the project to the back of the garage and beginning the 1990ZZR that was waiting for resto.
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