I have a 1998 Spirit 1100 that started leaking from the crossover tube between the cylinders. It seaped/dripped down the left side and at first looked like a leak from the joint between the cylinder and the engine case. The crossover tube has an o-ring on each end, they do sometimes leak. It would be worth checking into.
1998 VT1100 Spirit
Ridin' is Livin'