Sorry, had to get ya'll attn . My bike 1994 , when cold , is getting really hard to start. (great when warm) I had a feeling my quick silver is not pumping any more. so I screwed in adjustment all the way & no difference. I then pulled carb from boots & looked thru venturi to see if squirting when quick throttle twist, still no squirt. Yes gas flows good from tank & bowl gets gas . I unscrewed adjustment screw completely & gas came out . Also twisted grip quickly wihout adjuster in and flow coming out will squirt out of the adjustment screw hole . So I assume the check ball bb is in place and plunger is still pumping. Its been running good for about 2-3 years & now ??? The only thing I can think of is , there's a clog some where in circut. I do have a small in line filter at petcock & still flows good .Any thoughts ?