I guess I will bring this up to date. I bought a Kavan 50 and on inspection...it never was run at all. I now because I pulled the pan off and it was pristene inside. I only run it about 2 times a year. Love it. I have a digital sensor and each cyl runs within one degree of the other cylinder. Sounds awsome. I will post a photo of it...I have to take a new photo though....my engine photos are in my old computer. Best Regards Capt,n 7/9/2011