Originally Posted by
chicky03
The only difference that I know of is the part of the carb that goes into the engine on the 69 is metal where the 63 was plastic. So unless you take your carb on and off all the time it won't matter which carb you have. The 63 will deform slightly if you crank down on the carb bolt too many times or make it too tight.
Thanks.
There are several differences between carbs, if i rember correctly 63 or 65 carb has a different internal volume. This again affects fuel economy and how the engine tunes. There is a lot more to the carbs than what meets the eye.