For the past few months, MV fans have been waiting for something concrete about the new 675cc triple, the F3, from MV Agusta. There’s been lots of spy shots, though mostly those were of a bike with F4 fairings, preventing us from getting a good look at the bike’s final appearance. That’s changing now, as MV begins releasing some images of what appears to be the final pre-production version.
We’re still short of performance specs for the F3, but Motociclismo, in Italy, is reporting the bike will have radial valves like the F4, a cassette transmission, and will weigh in, dry, at 354 lbs. As a 675 triple, this bike’s obvious performance comparison will be with the Triumph Daytona 675. The Daytona is 407 lbs., wet, with an engine output of 124HP at 12600 rpm and 53 ft.lbs of torque at 11700 RPM making for a pretty revvy bike, although not unusually so for a SuperSport.
So, the real question is whether MV is going to be satisfied with simply matching those specs…or try to better them. A 10% increase in power would give the F3 an output of 136HP. That would be…fun. How they’d get that much of an increase is a bit problematic, though.
The Daytona 675 already has a compression ratio of 12.65:1, so there’s not a lot of room to grow there, and a compression ratio of 20:1 to get to 136 HP is right out. An increase to a race-spec compression ratio of 14:1 yields an output of 127HP, so I think we’re pretty much done, there. Exhaust restrictions are probably going to limit any increase by preventing a freer-breathing–hence more polluting–system from being implemented. We’re already at 4 valves per cylinder, too. So, we’re pretty much down to really hot cams, I guess.
I can hardly wait to see what the final specs look like.