A 1250 cc Screamin' Eagle version of the Revolution engine was made available for 2005, and was present thereafter in a single production model from 2005–2007.

Don't they have any bike which is upto 1500 cc???

Obviously they have. Search for it. I think you will find it at your nearest showroom of Harley Davidson.

An internal combustion engine is basically an air pump. The faster you spin it, the more air it processes within a given time. The amount of power it produces is governed by the amount of fuel it burns, which depends on the amount of air it can breathe. More air can mean more power. Turnning the engine over faster will also increase air and fuel flow and cause it to make more power.