my sami is hard to start in the morn after work or any time it sits for more than a few hrs . to get it to start i have to pump the gas continuously while i turn the key flooring it does nothing. a new problem when i drive down the road especially when going up hill it feels like its gonna die ill go from 45 to 35 like that and back, anyways iv been told its most likely a carburetor issue, cause it sat for 5 years before i bought it. the carburetor needs to be rebuilt anyways, so i thought i would just go with buying a calmini carburetor. is it good? or is my problem somewhere else?