Lots of Fox posts reveal what truly is going on with frustrated buyers.
I haven't seen a post with a problem with a
brand new Fox since their new carb. Before that they cleaned up their act with the head buttons and other issues that made them overcompressed and detonate, sometimes even with FAIfuel. All frustrated posts are with older engines and often because they did not have the manual and did not know the correct proceedure to tune the engine, or were using too much nitro.
You cannot take ONE Fox engine, and ONE Rossi and make a conclusion on tuning.
Actually with the older Fox .46 and the Rossi 2000 .46 the Fox is easier to tune. That Rossi had issues with the carb. Yes the Fox had crude needles, but they worked well. The newer Fox's have even better needles than Rossi or OS.
http://www.foxmanufacturing.com/inde...oducts_id=1514
http://www.foxmanufacturing.com/imag...carburator.jpg