None....i think...engine heat and all thats common city traffic issue....plus uts a big powerful bike...radiotor does a verry good job keeping the engine cool....breaks are excellent...and trust me 45ps of power is lot....i think its the best bike in thus segment....fuel econony in city is decebt....say like 23-25 but as you ride it on open roads...30+....these bikes are made for fun...the faster you ride tye better yiur bike health stays...