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I have finally torn into my motor to clean water passages out. I found the passage between the cntr and bottom cylinder blocked. I am down to a couple of bolts on the exaust manifold. With lots of patence and heat I have removed the outside bolts and have only broke 1 middle bolt. I am working on cutting the heads off the rest of the bolts so I can heat them after the manifold is removed. I saw that Yamaha has listed these bolts as obsolite on there webesite. Does any know what size/thread they are or where it buy replacements ? I was thinking of replacing them with studs so I can easly access the water passages later if needed due 100% saltwater use. I am also rebuilding the carbs and was wondering about replacing the reeds. I run Boysen in my dirt bikes and it has always been worth the $. Is there any better reeds any one has used or know about ? Any thoughts on these matters would be great !
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The exhaust plate bolts superseded to 97014-08040-00 Bolts but are available.
The Boysen reeds break more often that original ones do but they probably are available for that engine.
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