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Thanks Shanared and Rocky. I'll check the head gasket for leaks. I've read that if you hold a piece of tissue close to the join the escaping air should cause it to move.The acceleration problem doesn't involve any backfiring but appears to be more due to the engine missing. As soon as it has reached higher revs it maintains a steady speed without further jumping. I wondered initially if it was a fuel supply problem. The carbs are only 6 months old and have run perfectly since fitting. However I noticed that the air screw is factory set to one and half turns out. I always used to use two and a half. Wonder if I should return to that?
Thanks Shanared and Rocky. I'll check the head gasket for leaks. I've read that if you hold a piece of tissue close to the join the escaping air should cause it to move.
The acceleration problem doesn't involve any backfiring but appears to be more due to the engine missing. As soon as it has reached higher revs it maintains a steady speed without further jumping. I wondered initially if it was a fuel supply problem. The carbs are only 6 months old and have run perfectly since fitting. However I noticed that the air screw is factory set to one and half turns out. I always used to use two and a half. Wonder if I should return to that?