After market exhaust suggestions for 2007 TT250RV

[DELTA]

Hi, any ideas on a suitable aftermarket exhaust for my 2007 TT250R? and would I also have to rejet if I change the exhaust? any advice would be most appreciated:confused:

[Trouser]

Yamaha do a optional exhaust. Kiwirider fitted one on to their longterm test bike. About $500 and made a noticable difference.