Hi i have an Xreg 900 cinquecento that hunts badly at idle. Its like
you are blipping the throttle. Also does an 1100 sporting complete
exhaust fit a 900.
Thanks Ash.

Thottle cable too tight is one cause. Make sure there is plenty slack at idle.

You cannot fit a complete 1108 exhaust, the manifolds come from different sides of the head, but post cat you can use it, although it will need an insert. The 1108 pipe is larger bore than the 899.

Cheers

D