Dave Ett wrote:Fuel coming out of the pipes is most often caused by sitting for a while when the float valves haven't shut off the fuel, so the carbs overflow into the crankcase and that excess fuel is pushed through the engine.

Not sure how that could happen after a race though!

Maybe you better start by telling us the exact modifications...

Yeah I thought of that, and it seems possible that perhaps it could fill between races? That would have to be quite a flow of fuel within an hour though. Is there a simple way to check if the valves are sealing?

Re. Float levels, forgive my ignorance but how would the level cause the symptom? Would it push more fuel though the jets?

Specific mods are: Tyga exhaust, Tyga reed valves, rear head conversion, standard oil pump and standard power valve adjustment (which is working I believe - well it was when I checked yesterday morning). Jetting I obvious can't really discuss but the power jets have been blanked and mains adjusted.

So the suggestion of too large pilot jets isn't valid you fellas don't think?