What Exhaust

Can anyone tell me what they would do in terms of exhaust options if fitting a standard 125 Starstream engine and carb into a lui as not sure if a standard Vega exhaust that i have spare would fit and work or should it just be used with a new remade standard 125 Starstream pipe to keep it simple.

Any suggestions

first theres the rear shock mount to overcome.
exhaust wise, i'd keep it looking like a lui if single seat etc, and use a starstream exhaust. the vega exhausts are a pain on the bigger cylinders, i lost patients and cut brackets off mine and had a mate tig them back up.

Is that because the exhaust port is in the wrong place?