THe CRF one probably wont bolt straight on without an adapter. If it’s off idle bog you are trying to sort out, have a look at the Mikuni then. I ran one on my 600 and Chicken runs one still. The Mikuni made a world of difference, especially getting rid of the “post jump bog” it suffered from. They are also a sinch to start again after a drop too,where as the stocker carbs flood easily. Ballards do a kit and I think from memory it was around the $435 mark for the Carby , cables and new Throttle tube etc..