RE: Q500 entry-level Q's
A Grand Chelem V2 or a Viper or a Parana with a 23R40 (3 port) with its stock black tuned muffler is going to get you 140 plus mph(240+ kmh) as will a TT40 on a Performance Specialties or Jett tuned muffler. Hardly an entry level combo. These combos fly more like 428s than 424s. The problem with the Rossi is that it weighs 84 grams more than the TT and a 112 grams more than a Nelson or Jett and pesents a real balance problem with most quickie configurations.
Denis