I have 3 diferent ASP 2 stroke engines and 1 Four Stroke.
Those are:
ASP 40, ASP 46 and ASP 52
All of them are Series 3 models
ASP 61 FS , in a 52 case.

I bought them from Just Engines UK.
Excelent engines, beter performers than OS (the 2 strokers) , a little less than OS (the Four Stroker).

The quality is Good, some miror leaks, but not affecting performance.
A lot of people are using them at my Club, we have yet to find one that has a problem, or does not run well.

Give them a chance, you won't regret it.

Baper