Congratulations, very nice bike!
A few years ago i had a '93 model of the KTM 600 LC4, and in terms of concept and workmanship this was by far the best bike i ever owned. You will notice the racing background that KTM come from on every bolt and every screw. The Japanese learned a lot from these bikes.
55hp is a very good achievement for a 600cc engine, even if it is called a 620. Giving the cylinder head a little tlc you can earn about 60hp, and believe me, this is a lot! Of course you can double the power by installing a turbo charger
, but if it would be my bike, i would leave the engine untouched and stay with the 55hp. Don't forget to change the oil about every 1000mls, the engine will be grateful.
Have fun with your KTM!
