What are some common problems
as with all bikes of this nature, check for runout in wheels, loose spokes, lighting working, suspension not leaking, brake discs for exsess wear, check coolant level , check engine oil for evedence of water, leaking water pump, radiator cap leaking past overflow pipe this could be pressure in system due to head gasket failure, fuel leaking, also check area around eng oil plug for evidence of repaire with cemical metal or similar, slightly noisy tappets is not uncommon,, normaly prety good bike, avoid bikes that smoke exsessive, check all gears are working correctly. dont jump out of gear ride in every gear and check for mechanical noise from gearbox, good gearbox normaly easy to select, doesnt jump out of gear, if u are looking at buying a bike of this nature they are fairly high maintenance, like to be cleaned , oiled and addjusted frequent oil changes, these are basic things i would check when buying a machine of this type, not nessasary a ktm, and these coments are not meant to harm your decision only help you chose the rite one.