Hiya Frank

I don't think the problem is the design of the engine - it's probably more to do with trying not to launch too many different models at once.

Triumph have said they guarantee three (or was it two?) new bikes every year for the next 10 years.
'New' could mean re-vamped too I suppose.

Anyway - Americas and Speedmasters are selling well enough so I suppose they feel happy with the smaller end of the cruiser market and they (currently) have the daddy with the Rocket so they are obviously concentrating their efforts elsewhere.

I brought this subject up last year and I think it's going to come - we'll just have to wait.

As I said, the engine shouldn't be holding Triumph up, they originally went for 1500/1800cc for the Rocket until they heard Honda were developing 2000cc.
So I'd say the engine is already there.

With the scrambler, 675 and lazy Rocket, that's it for a while.
We've just gotta wait for the 1500/1800cc cruiser, the Trophy replacement (a monster tourer with 1500/1800cc?) and the 1050cc Tiger to come out ...