In physical appearance the "new" 550 Fuji block is very much like the older 440 block. In many ways the new one has been improved in several small ways which I like.
So, what's not to like? Well, there are the obvious problems that have been rather well documented here and elsewhere. But aside from those and the adjustments which have been made in the carburetors, timing, etc to correct them, and the likely fact that heat appears to be related to most failures....is it possible that the engine just doesn't breathe well sometimes?
One of the most significant differences, physically, is that the 550 has reeds, while the older fans did not. That is a really noticeable difference in how they run, especially noticeable when you have ridden one of the older ones for awhile. Yet you never, or almost never, hear anyone mention reeds as a possible cause of the problems the engine has. And I wonder.....those reeds are one of the things that have stayed the same throughout the ten year history of the engine: part # 3085715.
I wonder how and whether the 550s would run sans reeds or with different or modified reeds? And what changes one might have to make in carburetion in order to get things right. Has anyone heard of pioneering souls who have played with this?
So, what's not to like? Well, there are the obvious problems that have been rather well documented here and elsewhere. But aside from those and the adjustments which have been made in the carburetors, timing, etc to correct them, and the likely fact that heat appears to be related to most failures....is it possible that the engine just doesn't breathe well sometimes?
One of the most significant differences, physically, is that the 550 has reeds, while the older fans did not. That is a really noticeable difference in how they run, especially noticeable when you have ridden one of the older ones for awhile. Yet you never, or almost never, hear anyone mention reeds as a possible cause of the problems the engine has. And I wonder.....those reeds are one of the things that have stayed the same throughout the ten year history of the engine: part # 3085715.
I wonder how and whether the 550s would run sans reeds or with different or modified reeds? And what changes one might have to make in carburetion in order to get things right. Has anyone heard of pioneering souls who have played with this?