I have recently bought one with a knackered electric start, speedo drive and custom made predator exhaust. Purple in colour and in good general condition but the parts to put the sprag clutch plus housing to rights has cost over £350. Seems I bought a lemon, though a pretty one! Fed up with needing special tools to work on it which have to be bought or bodged up in the shed. Interested to know what the tuning you have done has improved. ive been told bigger header pipes make areal improvement and losing the airbox lid/K&N filter?