Ive been forced to switch and I chose novarossi. Simply because there are no engines in the country and there has not been since the first 5 21 sti pr pro evo 2 engines of witch i baught 2 and gave one to a friend that he ran at the australin nats last year. Its been a very long time and to put it simply I have one engine that can not be use. And not because it dose not run Infact its very very fress. I picked Novarossi because I was supported with an engine and From the start I tryed to brake the engine a Novarossi and it took every thing i through at it and its now 30ltrs old and with only one front and rear bearing change and a conrod piston pin and clip change Its due for a 2nd rod now. But it has to bee seen to be belived. I still support sirio because i have seen the best and worst it has to offer. I just don't understand why when and if a prob is braught to the atention of the factory they don't act on it. Have a look at the Ninja 21 on-road Every one knows that the very first lot had probs. Grp and Ninja I feel did the right thing by anouncing that there was a prob not all engines were afected but They put a recall out and it slowed the amount of failurs. To me if a company any company has the balls to say there may be a prob publicly and order a recall on certan batches. That shows me that they care about there reputation. If they do nothing and sweep it away because the company lets it go way to far then thats down right bad for bizz. That how i feel and Thats all i want to say on the matter. Thanks and Best Regards Jeremy.