Finally got my Ultra RC Yak 54 DL50out and in the air this week and what a blast had the engine a little rich the first couple flights. I leaned her out and she doesn't miss a beat.
I changed exhausts from the stock exhaust to an old KS can that I purchased about 10-12 years ago, it is super quiet but it robs a lot of rpm's. With the can I get 6860 rpm's
and the stock exhaust I was getting 7800-7900 on a 22x8 menz. I don't need any more power as I have unlimited vertical and great throttle response, this engine really kicks butt.

Bob, I know that you havethis same plane, so are you running a can? If yes how did you tighten it in the tunnel?


Thanks
Jeff