Max said:The injectors and throttle body are the same. The difference is the flash on the ecm. I have ridden a couple of dozen now 1250's and honestly can't tell the difference in how they feel. It might be a little more torque but not enough to make any kind of noticeable difference. So if your changing just for the size you might re-think it and spend your money other places. If you have a bad motor and a chance to get a 1250 then it will work fine if you get a race tuner to flash the bike.
As Max stated, the only difference is the ecm flash. You can find a 1250 ecm or maybe have a dealer flash your current ecm to the 1250 specs.Cakkadue said:The old motor is broken. Supercharger was not the way to go :-(
I have the 1250 motor in the shop, so all I needed to know was if it would fit without big modifications. Thanks for the answers so far!