a friend cleaned carbs, no petrol smell in the old oil, put fresh oil in, bike still won’t start? it sounds like I’m starting a normal working bike except the starter just carries on instead of a sweet Vrooomm. What could it be? And could the clutch thing have anything to do with this? Also when I hold the starter down for a little bit, the fuel pump clicks ONCE a couple of seconds after I let go of the button, is this related? There’s only a reserve, off or on, there’s no prime or anything else, no filter on the reserve just a tube at the bottom of the tank.