Usually the 7 speeds are fitted alonmg with better barrels carbs and exhausts so yeah there is a big difference , i have tried and ordinary 6 speed with a 7 speed and yes it was also fun .
Im not the sort to obsess about power and gear ratios etc but yes 7 speeds are fun but then again so are 6 speeds .
Here is how you tell if you engine is 6 or 7 speed and the mechanical differences .
As you can see in above picture ( not very clearly ) the engine code stamp 5P this tells me it is the
7 speed engine .
under this stamp is the engine number
Mine begins with BG97 which tells me its a 1997 model so a cagiva mito evo 1 1997 .
That s how you tell year and if its 7 speed from the outside of engine .
Here are the internal differences
The engine cases are thje same as in a six speed Cagiva just shave off a bit of metal to be able to squeeze in the extra gear .
close up picture of machined casing
The only other differences are in the gearbox itself obviously 7 gears on input - output shafts
Cagiva also added an extra selector fork which is needed to select the gear , i presume the shafts are the same lengths as before to avoids case changes and i also assume the selector drum would be different ill find out when i get a 6 speed in bits to compare .