Speedmaster/america Fuel Tank Swaps

Speedmaster 790cc (-2006) have 16.6-litre (4.4gal) and 865cc (2007-) have 19.3-litre (5.1gal) fuel tank, that gives a 240km (150-mile) range.
Speedmaster 1197cc (2018)
have 12-litre (3.2gal) more for retro sizing but has better mpg

 

The 790cc and 865cc variants share the same frames etc !!

 

Had a 2007 865 (865 engine came out 2005 in uk) carbed speedmaster, carbs are pretty reliable and easy to keep on tune, fuel consumption is slightly better on EFI bikes from 2008 on but as previously stated you get less fuel in tank due to space taken up by internal fuel pump.

 

The 790 and 865 engines put out identical horse power , but they make it differently . Rode a mates 790 back to back with my 865 , 790 makes power later than 865 ! Both peak at same out put .

The fuel pump would take up less than 200cc of fuel space ! I've had my fuel tank apart , to replace the fuel filter.

Wouldn't be too hard to retro fit a fuel injected tank to suit a carbureted bike.

 

I had a 2009 America. They went to the wider tank that year so accommodate the inj. and give greater range. Here in Phoenix I am interested in coming back to Triumph because I really liked my America but it didn't have enough power to compete on the roads of our southwest. Now with 1200 cc I assume there will be enough but they've gone and reduced the range with the smaller tank. So I'd like to know if the new Speedmaster can be fitted with the old 5.1 gal. America tank to give the range I need.