We have now installed this ignition system on 2 of our 2010 TC250's. One common result is a VAST improvement on BOTH bikes, especially towards the top end. In fact I would go as far as to even say a dramatic improvement and if you are serious racer well worth the purchase!!! There is though one conflicting point. One of the bikes has a full Devil exhaust system and the other the full HGS system complete with a thinner needle and jet set that came with the exhaust. The bike that has the Devil system is almost impossible to start off the kick and has to be bumped while the HGS is no where as difficult and can normally be kick started. Does anyone know why this may be?? Before installing the JD ignition the bike was easy to start. Any tips would be greatly appriciated!! Bottom line though the JD system is a great piece of gear!