Weeks ago, I purchase my first 4-stroke engine a RCV 60. I was a little bit afraid about this 'break ins' and so...
But, surprise, no problems. After 2-Hours break-in, this motor is running and running...great.
It's smoking like a old man with a big cigar.....kidding.
Next, I buy an RCV 90.
Cheers.

Hi

Thanks for your comments. I am pleased to hear you are happy with your engine, and am very pleased that you are now considering the 90 size.
As you say, as long as you break in the engine, you should not experience any problems and the engines do run great.

Best regards
Laurenne