Sorry if this has been covered before, I have looked for quite a while but couldn't see the answer, If I change the exhaust on my Pulse Adrenaline 125 to one of these http://cgi.ebay.co.uk/ws/eBayISAPI.d...T#ht_624wt_698
and fit a 16 tooth front sprocket would I have to up jet the carb? if so what to? I would prefer to stay out of the dark art of carb fettling if I can help it, I just want to be able to sit at 60mph or so comfortably.
Thanks all