Alright i was on my way home from work, and then i took off this one time and the car just ran like a dog, i had to pull the choke out and managed to limp home. I had a fiddle with the mixture screw starting in little increments then just went to the extreme but still no change at all, i took had a look insede the carb and seems to be jetting alright, it doesn't blow any black smoke. Now this leads me to believe it may be some sort of ignition problem. I recently did a major service just after i bought it (about 3 weeks ago) which means it has new leads and plugs, the dizzy looks reasonably new, so i was wondering if it may be the timing is out. and help of suggestions is greatly appreciated cheers!!