hello all.. i got a little problem with my f15 malaguti. it has a molossie 70 kit on it, 4 gram rollers, and up jetted to a 75, standard air box and exhaurst, new belt, standard carb, i goes about 50 mph down hill and 45 on a flat road, the problem i got is when i pull off from stand still it bogs a bit then goes, when choke is on its ok. iv tried smaller jets/bigger, and tried 5gram rollers, cleaned carb, its has a new clutch and new red springs, but this problem is still there. can anyone help me out with this ?? many thanks for reading.. cheers. mark1,