what model 770?
an exhaust hose will split for a few different reasons
1. age (most common)
2. defective hose from factory (havent seen one yet)
3. blocked exhaust causing extreme pressure
4. lack of cooling water (usually will melt through not split)
does the engine seem to run hot? manifold hot? water box hot?
have you run it on the trailer with a flush kit to see how much water comes out the exhaust?
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1999 Tigershark 1100R
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