I took my Fully modded JS out for a spin yesterday. It was a pleasent surprise. It has a smooth powerband, which made it easy for me to control power. With 7.5 insert it had a competetive fuel economy and on the straight it seemed to have just and inch more top speed than the average engines i was racing against (top line RB's and Novarossi's). However, the straight was fairly short, so it was difficult to say for sure.

One problem i noted was that the carburator didn't seem to move so smooth. I compared it to some of my older engines (a Go and a Novarossi) and it was clearly more tight. It was the same for my buddies FM JS. Any ideas or thoughts on this experience?