finally my nrg is running had a problem with the fuel not getting through as its a vacume system but at last success all i needed to do was drill a small hole at the back of the carb inlet manifold glue a nipple from my standard carb into it with epoxy attach the vacume hose to it and BINGO she runs thankyou haynes manual just shows you that read enough and the answer finally slaps you in the face lol